WO2010113961A1 - 皮膚外用剤の塗布方法、及び該方法による塗布評価方法、塗布評価装置、及び塗布評価プログラム - Google Patents
皮膚外用剤の塗布方法、及び該方法による塗布評価方法、塗布評価装置、及び塗布評価プログラム Download PDFInfo
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- WO2010113961A1 WO2010113961A1 PCT/JP2010/055729 JP2010055729W WO2010113961A1 WO 2010113961 A1 WO2010113961 A1 WO 2010113961A1 JP 2010055729 W JP2010055729 W JP 2010055729W WO 2010113961 A1 WO2010113961 A1 WO 2010113961A1
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- evaluation
- skin
- application
- value
- coating
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Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/44—Detecting, measuring or recording for evaluating the integumentary system, e.g. skin, hair or nails
- A61B5/441—Skin evaluation, e.g. for skin disorder diagnosis
- A61B5/442—Evaluating skin mechanical properties, e.g. elasticity, hardness, texture, wrinkle assessment
Definitions
- the present invention relates to a method for applying an external preparation for skin, and an application evaluation method, an application evaluation apparatus, and an application evaluation program according to the method, and more particularly to a skin external preparation for improving reproducibility when applying an external preparation for skin.
- the present invention relates to a coating method, a coating evaluation method, a coating evaluation apparatus, and a coating evaluation program.
- external preparations for skin including cosmetics are basically applied to the skin using a finger or an applicator.
- the act of applying with a finger or an applicator can be freely adjusted based on the usage scene, situation, or preference, so for example, makeup cosmetics etc. are thickened with the intention of the user himself / herself It can also be thinned.
- the in vivo SPF measurement method which is a method for measuring the UV protection effect of a skin external preparation, describes a method for actually applying the skin external preparation to human skin using a finger or a finger sack. Has been.
- the in vivo SPF value described above is used as a scale representing the ultraviolet protection effect of a skin external preparation such as a sun care product for preventing sunburn caused by ultraviolet rays, for example.
- the in vivo SPF value is an index indicating the effect of protecting the skin from sunburn caused by ultraviolet rays and preventing sunburn.
- the amount of ultraviolet rays necessary to cause a slight redness when using a skin external preparation Is defined by a value obtained by dividing by the amount of ultraviolet rays necessary to cause a slight redness when a skin external preparation is not used. For example, when using a sun care cosmetic product with an in vivo SPF value of 10, it can be said that it is ten times less likely to be tanned with bare skin.
- the in vivo SPF value is determined by using artificial light (solar simulator) that is very close to sunlight, irradiating the skin to which skin external preparation is not applied and the applied skin with a certain amount of ultraviolet rays, respectively, and tanning the next day ( It can be measured by examining whether erythema has occurred.
- artificial light solar simulator
- the in vivo SPF value is used, an objective evaluation of the UV protection effect of the external preparation for skin can be performed.
- it is indispensable to cooperate with a large number of subjects of a specific skin type, which requires a great deal of cost and days.
- Patent Documents 1 to 3 disclose an in vitro SPF evaluation method for measuring an in vitro SPF predicted value without using a subject.
- a skin substitute film used in the in vitro SPF evaluation method a polyethylene sheet, a nylon film (see Patent Document 4), a quartz plate, a PMMA plate (see Non-Patent Documents 1 and 2), and the like are known.
- the surface of one side of the nylon membrane of Patent Document 4 is provided with a groove imitating a skin groove whose longitudinal section in the short direction is V-shaped, and unevenness is provided by blasting in the non-skin groove portion. It has been.
- Non-Patent Document 3 has a provision that the application amount of the external preparation for skin when measuring the in vivo SPF value is 2.00 mg / cm 2.
- the application amount of the external preparation for skin when measuring the predicted value of in vitro SPF is about 0.75 to 1.20 mg / cm 2 .
- the degradation of the ultraviolet absorber proceeds at the time of measuring the in vivo SPF value. Since the in vitro SPF predicted value of such an external preparation for skin containing an ultraviolet absorber is different from that for measuring the in vivo SPF value, the measurement conditions for the in vivo SPF value are sufficiently reproduced. It may not have been done.
- the application amount of the external preparation for skin when measuring the predicted value of in vitro SPF is set to 2.00 mg / cm 2 in the same manner as when measuring the in vivo SPF value. In addition to this pattern, the application state at a microscopic level of the external preparation for skin is also important in reproducing the measurement conditions of the in vivo SPF value.
- the present invention has been made in view of the above-described problems, and is a method for applying a skin external preparation for improving reproducibility when applying a skin external preparation, and an application evaluation method and an application evaluation apparatus using the method. And an application evaluation program.
- the present invention employs means for solving the problems having the following characteristics.
- a skin external application for evaluating characteristics of the skin external preparation obtained by applying a skin external preparation to the skin substitute film and irradiating the applied skin substitute film with light.
- a first application procedure for spreading in one direction from the side surface on the skin substitute film, and a second application for spreading in one direction from a direction perpendicular to the direction spread by the first application procedure The method includes a procedure and a repeating procedure in which the first coating procedure and the second coating procedure are repeated a predetermined number of times.
- the wavelength range of the light to be irradiated in the present invention is not particularly limited, and it is also effective when, for example, the application state is visually confirmed under room light or sunlight.
- membrane can be improved.
- the uniform application in the present invention enables highly accurate evaluation of various characteristics of the external preparation for skin on the skin substitute film. For example, reproduction of physical characteristic evaluation without irradiation of light such as water repellency and oil repellency on the skin. Can also be used.
- the first application procedure and the second application procedure are based on the time required for the entire coating to be 0.5 to 5 strokes per second, One cycle is about 3 to 20 seconds, and all coating operations are completed in about 30 to 90 seconds from the start of coating.
- a numerical value acquisition procedure for quantifying and acquiring the intensity or transmittance of transmitted light obtained by irradiating the skin substitute film with light, or the intensity or reflectance of reflected light;
- the numerical value obtained by the numerical value acquisition procedure is acquired a plurality of times, and the in-plane variation evaluation, the coating substrate variation evaluation, the absolute value evaluation based on the simple in vitro SPF value, and the in vitro SPF evaluation device are used from the acquired numerical values.
- An evaluation value calculation procedure for calculating an evaluation value for performing at least one of the final numerical evaluations, and application of the external preparation for skin to the skin substitute film based on the evaluation result calculated by the evaluation value calculation procedure And a determination procedure for determining whether or not is correctly performed.
- the evaluation value calculation procedure calculates a CV evaluation value of variation due to a simple in vitro SPF value as the variation evaluation within the coating surface.
- a 17% test for variation based on a simple in vitro SPF value is performed as the variation evaluation between the coated substrates.
- application evaluation for evaluating characteristics of the external preparation for skin obtained by applying an external preparation for skin to the skin substitute film and irradiating the applied skin substitute film with light.
- numerical value acquisition means for numerically acquiring the intensity or transmittance of transmitted light obtained by irradiating the skin substitute film with light, or the intensity or reflectance of reflected light, and a numerical value obtained by the numerical value acquisition means Is obtained multiple times, and at least one of the obtained numerical values is evaluated among in-plane variation evaluation, variation between coated substrates, absolute value evaluation by simple in vitro SPF value, and final numerical evaluation using in vitro SPF evaluation device.
- An evaluation value calculating means for calculating an evaluation value for performing the treatment, and on the skin substitute film of the external preparation for skin based on the evaluation result calculated by the evaluation value calculating means Coating is characterized by having a determining means whether or not performed correctly.
- the evaluation value calculation means calculates a CV evaluation value of variation due to a simple in vitro SPF value as the variation evaluation within the coating surface.
- the evaluation value calculation means performs a 17% test of variation based on a simple in vitro SPF value as the variation evaluation between the coated substrates.
- the application evaluation for evaluating the characteristics of the external preparation for skin obtained by applying an external preparation for skin to the skin substitute film and irradiating the applied skin substitute film with light.
- the computer obtains the numerical value acquisition means for numerically acquiring the intensity or transmittance of the transmitted light obtained by irradiating the skin substitute film with light or the intensity or reflectance of the reflected light.
- the obtained numerical values are obtained multiple times, and from the obtained multiple numerical values, among the in-plane variation evaluation, the coating substrate variation evaluation, the absolute value evaluation by the simple in vitro SPF value, and the final numerical evaluation using the in vitro SPF evaluation device Based on an evaluation value calculating means for calculating an evaluation value for performing at least one, and an evaluation result calculated by the evaluation value calculating means, Application to the skin substitute membrane of Hadagaiyo agent to function as a judging device for judging whether or not performed correctly.
- the questionnaire analysis result in the present invention can be easily realized by a general-purpose personal computer or the like.
- the evaluation value calculating means calculates a CV evaluation value of variation due to a simple in vitro SPF value as the variation evaluation within the coating surface.
- the evaluation value calculation means performs a 17% test of variation due to a simple in vitro SPF value as the variation evaluation between the coated substrates.
- the reproducibility when applying the skin external preparation can be improved.
- the present invention formalizes the know-how and experience of an expert when applying a skin external preparation such as cosmetics to a predetermined site such as the skin or skin substitute membrane, and is reproducible in a very short time even without any application experience.
- Systematically establish clear methods and training methods so that high data can be acquired.
- coating increases,
- the reproducibility of data such as an in vitro SPF measurement, can be made high.
- sunscreen (sunscreen) cosmetics are used as an example of a skin external preparation to be applied.
- skin external preparations include makeup cosmetics, skin care cosmetics, pre-skins. Makeup cosmetics, body cosmetics, and the like can be used.
- the form of the external preparation for skin is not particularly limited, and for example, emulsion, lotion, solid, oil, spray, etc. can be used.
- the material of the skin substitute film is polymethyl methacrylate (PMMA), and the transmittance of light having a wavelength of 290 to 400 nm is 50% to 100%.
- PMMA polymethyl methacrylate
- the surface shape of the skin substitute membrane has a V-shaped cross-section as a skin groove, the groove depth is 30 to 150 microns, the groove width is 50 to 500 microns, and the groove frequency in the vertical and horizontal directions is 0.1. It is assumed that the groove frequency is 1 to 2.0 / mm and the groove frequency in the oblique 45 ° direction is 0.1 to 2.0 / mm.
- the part corresponding to the cuticle of the skin substitute film has an arithmetic average surface roughness of 0.1 to 30 microns.
- the shape which imitated the skin groove and the skin hill shall be given only to the one-side surface.
- the conditions for the skin substitute membrane used in the present invention are not limited to the above.
- FIG. 1 is a flowchart showing an example of a coating method in the present embodiment.
- preprocessing for weighing a sample is performed (S01).
- pretreatment for example, a skin substitute membrane of about 5 ⁇ 5 cm is placed on an electronic balance, zero (0) adjustment is performed, and a sample to be weighed is mixed well.
- wrinkles should be avoided when wearing a finger sack. This is because an accurate amount may not be applied due to the sample entering the basket.
- the sample is weighed (S02). Specifically, the weighing of the sample is started using, for example, a syringe or the like (for example, the required time is 50 seconds).
- the sample weighs, for example, in the range of about 10 to 80 spots per skin substitute membrane having a size of 5 cm ⁇ 5 cm, and more specifically, about 30 to 60 spots are preferable. If it is less than 10 spots, it becomes difficult to uniformly apply within the surface of the skin substitute membrane, resulting in a non-uniform application state, and if it exceeds 80 spots, the time required for weighing may be exceeded, This is because even in that case, the coating state becomes uneven.
- the spot position on which the sample is placed during application is uniformly distributed over the entire application surface of the skin substitute film.
- the sample is applied within a predetermined time set in advance for more accurate weighing. In addition, immediately after the completion of the weighing, the sample application is started.
- the skin substitute membrane is fixed (S03), and the spots are spread out in many small circles so that the sample is evenly distributed over the entire surface (S04).
- the four corners of the skin substitute film are fixed on a desk with a double-sided tape so that no deviation occurs during application.
- the surface of a black color is preferable because it can be visually confirmed while confirming the uniformity of application.
- the posture of the applicator when applying is that the back is stretched, the side is closed, the index finger with the finger sack is extended, and the contact surface with the skin substitute membrane is applied at the part beyond the abdomen of the finger. Is preferred.
- the sunscreen agent or the like is applied after the trainee has actually trained, it is preferable to learn by watching the actual finger movement by moving images such as videos or demonstrations by experts.
- FIG. 2 is a diagram showing an example of how to spread the skin external preparation uniformly in the present embodiment.
- the skin substitute film 1 is spread in one direction (left to right in the example of FIG. 2) from one side as shown in [I] of FIG. 2 (S05) (first application procedure). After spreading over the entire surface of the skin substitute film 1 by the process of S05, next, as shown in [II] of FIG. 2, it becomes perpendicular to the direction shown in [I] of FIG. 2 (different by 90 °).
- the coating is spread in one direction from the direction (in the example of FIG. 2, from top to bottom) (S06) (second coating procedure).
- the process of S06 is spread over the entire surface of the skin substitute film 1 similarly to the process of S05.
- the processes [I] and [II] shown in FIG. 2 are combined into one cycle, and this is performed a plurality of times (repeated procedure).
- the number of times is repeated, for example, within a range of about 3 to 10 times. This is because a certain limit is provided for the time required for coating, and if it is twice, uniform coating cannot be performed because the coating speed is too slow and the sample is not sufficiently dried.
- the number of times exceeds 10
- the application speed is remarkably high, so that the sample is quickly dried, and the application is repeated more than necessary, so that uniform application cannot be performed. Specifically, about 4 to 8 times are preferable.
- the time required for the entire coating corresponding to the process of S04 is preferably about 3 to 20 seconds, more specifically about 10 seconds. This means that if the time is within 3 seconds, the spot placed on the weighing will not spread over the entire surface, resulting in a non-uniform coating. If the coating is spread over the whole over 20 seconds, the time for coating in a certain direction thereafter will be applied. This is because it becomes shorter and results in non-uniform coating.
- the time spent in one cycle is about 10 seconds. That is, all operations are completed in about 1 minute from the start of application.
- the stroke amount and the time spent for one cycle are adjusted according to the sample to be applied.
- the coating is finished when the range of about 40 seconds to 80 seconds elapses from the start.
- the coating time may exceed the specified time if it is about several seconds. I do not care.
- the above-mentioned range is less than 40 seconds, the coating will be non-uniform on the whole, and if it is applied for more than 80 seconds, it will be excessively rubbed depending on the sample. It is to become. Specifically, about 1 minute is preferable.
- the application method in which the operation of spreading in one direction and then spreading in a direction perpendicular to the direction has been described multiple times, but the present invention is not limited to this, for example, It can also be applied in a circle from the center to the outside.
- the skin substitute membrane is not attached to a flat part such as a desk with a tape or the like, after the process of S05 in FIG. 1, the skin substitute membrane is rotated by an integral multiple of 90 ° to perform S06. Then, a method of spreading in one direction from the side surface in the same manner every time may be used.
- the uniform application according to the above embodiment enables highly accurate evaluation of various characteristics of the external preparation for skin on the skin substitute film. For example, evaluation of physical characteristics that do not irradiate light such as water repellency and oil repellency on the skin. It can also be used for reproduction.
- an evaluation apparatus for ultraviolet transmission characteristics and / or reflection characteristics of an external preparation for skin can be used, and is not particularly limited.
- Patent Document 2 Japanese Patent Laid-Open No. 2008-96151
- Patent Document 3 Japanese Patent Laid-Open No. 2008-1111834
- sample measurement can be performed while continuously irradiating light in the same manner as in vivo SPF measurement, so even if light degradation occurs in the sample, the same principle as in in vivo SPF measurement is used.
- An in vitro SPF value can be obtained.
- FIG. 3 is a diagram showing an example of an application evaluation apparatus for ultraviolet transmission characteristics of an external preparation for skin according to the present embodiment.
- the application evaluation apparatus 10 includes a light source 11, a filter 12, an optical fiber 13, an irradiation port 14, a skin substitute film 16 applied with a skin external preparation 15, a detection port 17, an optical fiber 18, and a spectrometer. 19, a photodetector 20, an electric signal processing / application evaluation processing unit (computer 21), a lock-in amplifier 22, an optical chopper 23, and an integrating sphere 24.
- the light source 11 is not particularly limited, and for example, a xenon lamp that is a light source of white light including ultraviolet light, visible light, and infrared light can be used.
- a xenon lamp that is a light source of white light including ultraviolet light, visible light, and infrared light can be used.
- the white light irradiated from a xenon lamp can be used as pseudo sunlight.
- the filter 12 is in the vicinity of the traveling direction of the light emitted from the light source 11, and corrects the light emitted from the light source 11 to ultraviolet rays (for example, ultraviolet rays having a wavelength of 290 to 400 nm).
- the light chopper 23 is irradiated.
- the filter 12 is not particularly limited, and for example, WG320, UG11 (manufactured by SCHOTT) or the like can be used.
- the light chopper 23 is a shutter that intermittently transmits the ultraviolet rays that have passed through the filter 12, and irradiates the ultraviolet rays with pulses.
- the pulsed ultraviolet rays are applied to the optical fiber 13.
- the optical chopper 23 is electrically connected to the lock-in amplifier 22, acquires a synchronization signal of pulsed light from the drive circuit 22, and synchronizes the signal from the photodetector 20.
- the optical fiber 13 is in the vicinity of the traveling direction of the ultraviolet light irradiated from the optical chopper 23 and guides the ultraviolet light to the irradiation port 14.
- the ultraviolet light guided to the irradiation port 14 is irradiated to the skin substitute film 16 to which the skin external preparation 15 is applied.
- the irradiation port 14 and the detection port 17 are fixed at a predetermined interval, and the skin substitute film 16 to which the skin external preparation 15 is applied is fixed at a certain distance from the irradiation port 14. At this time, the irradiation port 14, the skin external preparation 15, the skin substitute film 16, and the integrating sphere 24 are arranged in this order with respect to the traveling direction of the ultraviolet rays.
- the skin substitute film 16 corresponds to the above-described skin substitute film 1. Further, the skin substitute film 16 may be disposed on a substrate such as quartz having excellent ultraviolet transmission characteristics as required.
- the detection port 17 receives the ultraviolet light made uniform by the integrating sphere 24 and guides it to the optical fiber 18.
- the optical fiber 18 is in the vicinity of the traveling direction of the ultraviolet light emitted from the detection port 17 and guides the ultraviolet light received by the detection port 17 to the spectrometer 19.
- the spectroscope 19 is a spectroscopic unit that splits ultraviolet rays irradiated from the optical fiber 18 in a wavelength range of 290 to 400 nm, for example, at intervals of 1 nm.
- the ultraviolet rays dispersed by the spectroscope 19 are irradiated to the photodetector 20.
- the spectroscope 19 has sensitivity characteristics adjusted to ultraviolet rays, and in particular, by using a diffraction grating having excellent sensitivity characteristics in the wavelength range of 290 to 400 nm, the spectral performance can be made high sensitivity.
- a diffraction grating is not particularly limited.
- a concave diffraction grating (model number 10-015) (manufactured by Shimadzu Corporation) can be used.
- the light detector 20 detects the ultraviolet rays separated by the spectroscope 19 with an optical sensor, and converts the intensity of light of each wavelength into a signal by current or voltage.
- the signal based on the current or voltage is transmitted to the computer 21 that is electrically connected to the wiring.
- the photodetector 20 has sensitivity characteristics adjusted to ultraviolet rays.
- the sensitivity of detecting ultraviolet rays can be improved by using a photomultiplier tube having excellent sensitivity characteristics in the wavelength range of 290 to 400 nm. it can.
- a photomultiplier tube is not particularly limited.
- a photocathode made of In, Ga, N, Al, O, Cs, or the like, specifically, an InGaN photocathode or the like can be used.
- a semiconductor photodetector made of In, Ga, N, Al, O, or the like can also be used.
- the computer 21 is electrically connected to the lock-in amplifier 22 and receives data after the lock-in amplifier 22 detects and processes the signal received from the photodetector 20, and informs the user of the application evaluation apparatus 10.
- the data is processed so as to be easy to understand, and the result can be displayed on the screen, the result can be printed on a recording sheet, and the result can be stored in a storage medium.
- the computer 21 performs application
- each function of the coating evaluation apparatus 10 can be executed in accordance with an instruction from the user by an input means or the like.
- the lock-in amplifier 22 is electrically connected to the photodetector 20, the computer 21, and the optical chopper 23.
- the lock-in amplifier 22 controls the pulse light emitted from the optical chopper 23 and the signal received from the photodetector 20 to be synchronized. Specifically, the two signals are synchronized using a phase detection circuit in the lock-in amplifier 22.
- the integrating sphere 24 receives the ultraviolet rays that have passed through the skin external preparation 15 and the skin substitute film 16, collects them, and integrates them spatially to make them uniform. Note that the integrating sphere 24 can be omitted. In the coating evaluation apparatus 10, the arrangement of each means may be changed as necessary.
- the method for evaluating the ultraviolet transmission property of the external preparation for skin is not particularly limited, and disclosed in, for example, Patent Document 1 (Japanese Patent No. 3337832) and Patent Document 3 (Japanese Patent Laid-Open No. 2008-1111834).
- In vitro SPF evaluation method can be used. Thereby, an in vitro SPF predicted value can be measured.
- in vitro UVA evaluation method in vitro PPD method, in vitro PFA method, in vitro UVAPF method, Critical Wavelength method, UVA / UVB ratio method, Australian / New Zealand method, German DIN UVA balance method, SPF / UVAPF (PPD) ratio method, etc., and two or more of these may be used together (for example, Non-Patent Document 1).
- in vitro PPD method in vitro PFA method
- in vitro UVAPF method Critical Wavelength method
- UVA / UVB ratio method Australian / New Zealand method
- German DIN UVA balance method SPF / UVAPF (PPD) ratio method, etc.
- PPD SPF / UVAPF
- the wavelength region of light used in the present invention is not limited to the plurality of wavelengths exemplified in the above-described embodiments.
- the application state is visually confirmed under room light or sunlight. Is also effective. Thereby, the reproducibility at the time of apply
- FIG. 4 is a diagram illustrating an example of a functional configuration of the coating evaluation apparatus according to the present embodiment.
- the application evaluation apparatus 10 includes an input unit 31, an output unit 32, a storage unit 33, a numerical value acquisition unit 34, an evaluation value calculation unit 35, a determination unit 36, and a transmission / reception unit 37. , And control means 38.
- the input means 31 is provided in the computer 21, for example, and accepts inputs such as start and end of various instructions such as numerical value acquisition processing, evaluation value calculation processing, and determination processing.
- the input unit 31 also includes a keyboard, a pointing device such as a mouse, and the like.
- the output means 32 is provided in the computer 21, for example, and displays / outputs the contents input by the input means 31 and the contents executed based on the input contents.
- the output unit 32 includes a display, a speaker, and the like.
- the accumulating unit 33 is provided in the computer 21, for example, and accumulates the data of the numerical value acquisition result in the numerical value acquiring unit 34, the calculation result obtained by the evaluation value calculating unit 35, the determination result obtained by the determining unit 36, and the like.
- the numerical value acquisition means 34 acquires a numerical value that has been SPF evaluated by the coating evaluation apparatus.
- the numerical value is, for example, a numerical value acquired for evaluating the ultraviolet transmission property and / or reflection property of the external preparation for skin.
- the numerical value acquisition means 34 acquires the intensity or transmittance of transmitted light obtained by irradiating the skin substitute film with light or the intensity or reflectance of reflected light as a numerical value.
- the evaluation value calculating means 35 acquires the numerical value obtained by the numerical value acquiring means 34 a plurality of times, and calculates an evaluation value for performing a predetermined evaluation set in advance from the acquired plural numerical values.
- the evaluation value calculation means 35 is at least one of application surface variation evaluation, application substrate variation evaluation, absolute value evaluation using a simple in vitro SPF value, and final numerical evaluation using an in vitro SPF evaluation apparatus. The evaluation value for performing one is calculated.
- the evaluation value calculation means 35 is used for the application surface in order to realize application surface variation evaluation, application substrate variation evaluation, absolute value evaluation using a simple in vitro SPF value, and final numerical evaluation using an in vitro SPF evaluation device.
- the CV evaluation value of the variation based on the simple in vitro SPF value is calculated in the internal variation evaluation, or the 17% test of the variation based on the simple in vitro SPF value is performed in the variation evaluation between the coated substrates.
- the 17% test is based on, for example, the method shown in Non-Patent Document 3 Appendix IV. That is, if the provisional 95% confidence interval (95% CIn ′ [%]) calculated based on the simple in vitro SPF value for each skin substitute membrane is less than 17% of the provisional average in vitro SPFn ′, it is determined to be acceptable. Is.
- the determination means 36 determines whether or not the application of the external preparation for skin to the skin substitute film has been performed accurately from the evaluation value calculation result obtained by the evaluation value calculation means 35. By determining by the determination means 36, for example, even when there is no application experience, data with high reproducibility can be acquired in a very short time.
- the transmission / reception means 37 connects the execution program to a communication network such as the Internet by connecting with a communication network such as the Internet via a SCSI (Small Computer System Interface) cable, a USB (Universal Serial Bus) cable, a LAN (Local Area Network) cable, or the like.
- An execution result obtained by executing the program or obtained from another terminal connected to the terminal and capable of transmitting and receiving data or the execution program of the present invention can be provided to the other terminal.
- the transmission / reception means 37 acquires the numerical value subjected to SPF evaluation for the external preparation for skin such as cosmetics applied to the skin substitute film by the numerical value acquisition means 34. The acquired numerical value is stored in the storage means 33.
- the control means 38 controls the entire components of the coating evaluation apparatus 10. Specifically, the control unit 38 performs various controls such as a numerical value acquisition process, an evaluation value calculation process, and a determination process based on an instruction from the input unit 31 by a user or the like.
- various controls such as a numerical value acquisition process, an evaluation value calculation process, and a determination process based on an instruction from the input unit 31 by a user or the like.
- ⁇ Application evaluation apparatus 10 Hardware configuration>
- an execution program application evaluation program that can cause a computer to execute each function is generated, and the execution program is installed in, for example, a general-purpose personal computer or server By doing so, the evaluation process etc. in this invention are realizable.
- FIG. 5 is a diagram illustrating an example of a hardware configuration capable of realizing the evaluation process according to the present embodiment.
- the input device 41 has a pointing device such as a keyboard and a mouse operated by a user or the like, and inputs various operation signals such as execution of a program from the user or the like.
- the output device 42 has a display for displaying various windows and data necessary for operating the computer main body for performing processing according to the present invention, and displays the program execution progress, results, and the like by the control program of the CPU 46. can do.
- the input device 41 and the output device 42 may be integrated input / output means such as a touch panel, for example.
- a predetermined position using a user's finger or a pen-type input device is used. You can input by touching.
- the execution program installed in the computer main body in the present invention is provided by a portable recording medium 48 such as a USB memory or a CD-ROM.
- the recording medium 48 on which the program is recorded can be set in the drive device 43, and the execution program included in the recording medium 48 is installed in the auxiliary storage device 44 from the recording medium 48 via the drive device 43.
- the auxiliary storage device 44 is a storage means such as a hard disk, and can store an execution program in the present invention, a control program provided in a computer, and the like, and can perform input / output as necessary.
- the memory device 45 stores an execution program read from the auxiliary storage device 44 by the CPU 46.
- the memory device 45 may be a ROM (Read Only Memory), a RAM (Random Access Memory), or the like.
- the CPU 46 controls processing of the entire computer, such as various operations and input / output of data with each hardware component, based on a control program such as an OS (Operating System) and an execution program stored in the memory device 45.
- a control program such as an OS (Operating System) and an execution program stored in the memory device 45.
- OS Operating System
- execution program stored in the memory device 45.
- the network connection device 47 obtains an execution program from another terminal connected to the communication network by connecting to a communication network or the like, or the execution result obtained by executing the program or the execution in the present invention
- the program itself can be provided to other terminals.
- the network connection device 47 can acquire a numerical value or the like obtained by SPF evaluation for a skin external preparation such as cosmetics applied to the skin substitute film from an external terminal connected to the network.
- the evaluation process in the present invention can be executed by the hardware configuration as described above. Also, by installing the program, the application evaluation process in the present invention can be easily realized by a general-purpose personal computer or the like.
- FIG. 6 is a flowchart showing an example of a coating evaluation processing procedure in the present embodiment.
- FIG. 7A, FIG. 7B, and FIG. 7C are diagrams for explaining the evaluation contents in the present embodiment.
- the coating in-plane variation evaluation is for performing CV evaluation of variation based on a simple in vitro SPF value as in-plane uniformity evaluation.
- the CV value is a value obtained by dividing the standard deviation by the average value.
- the simple in vitro SPF value is based on the spectral transmittance measurement, taking into account the erythema action curve, and simply calculating the UV protection ability from the ratio of the erythema effect amount when the sample is applied to when no sample is applied. It is a numerical value and is defined as different from the in vivo SPF measurement in that it does not reflect the light degradation phenomenon of the sample.
- the contents of the evaluation method 1 are 10 evaluation experts using preset samples, and the number of evaluations by the skin substitute membrane is 5 per evaluation expert. Point).
- the above-mentioned sample for example, P3 (standard sample described in International SPF Test Method 2006) is used, and the skin substitute membrane has an arithmetic average surface roughness (Sa) in the range of about 15 to 25 microns, for example.
- An acrylic material is used.
- Sample application conditions include, for example, “the number of dropped samples in the skin substitute membrane during sample weighing”, “time required for weighing (seconds)”, “time required for application (seconds) (time to spread uniformly before application) ”,“ Stroke per application cycle (including length and width) ”,“ total number of application cycles ”,“ time (seconds) required to spread uniformly before application ”, and Evaluation can be performed using at least one of the conditions such as “time (minutes) required for drying after application”.
- Specific numerical values for the above items are as described in Examples 1 to 4 and Comparative Examples (1 to 6) shown in FIGS. 7A, 7B and 7C.
- FIG. 7A shows set numerical values of the example and the comparative example with respect to various conditions of sample coating.
- FIG. 7A shows set numerical values of the example and the comparative example with respect to various conditions of sample coating.
- a coating evaluation apparatus in the evaluation method 1 for example, a spectrophotometer U-4100 (manufactured by Hitachi, Ltd.) can be used, a spectral transmission spectrum is used as an evaluation spectrum, an evaluation wavelength is 290 to 400 nm, a wavelength The step is 1 to 5 nm, preferably 1 nm.
- the measurement locations within the skin substitute membrane surface are, for example, five preset locations (for example, one location at the center and four locations in the vicinity of the midpoint connecting the center and the four corners, such as the 5th eye of the dice). A plurality of distributed locations are used. The number of measurements is once per location.
- data analysis from the evaluation spectrum is performed by multiplying the xenon arc ultraviolet light source (non-patent document 3 (described in International SPF Test Method 2006)) spectrum by the spectral transmittance of the evaluation spectrum, and the erythema coefficient (CIE-1987, publicly known document). , And based on the erythema effect amount obtained by wavelength integration at 290 to 400 nm.
- a method for calculating the simple in vitro SPF for example, a method of dividing the erythema effect amount when the sample is not applied by the erythema effect amount when the sample is applied is used.
- an average value of 5 locations per skin substitute film to which a sample is applied is calculated, and a CV value (standard deviation is averaged based on the average value and its standard deviation in 5 sheets) (Value divided by value).
- the criteria for determining the CV value in the average of 10 people when the CV value is “30% or more”, the content should be set to the evaluation value “1” Can do.
- the content is set as the evaluation value “2”
- the content is the evaluation value “2”
- the content is the evaluation value “20% or more and less than 25%”
- the content is the evaluation value “ 3 ”
- the CV value is“ 15% or more and less than 20% ”
- the content is set to an evaluation value“ 4 ”
- the CV value is“ less than 15% ”
- the content is an evaluation value of 5.
- Evaluation method 2 uses the above-mentioned P3 sample as its contents, and 10 evaluation experts carry out 5 sheets each and perform a two-stage evaluation (pass or fail).
- conditions similar to those of the evaluation method 1 described above can be set as the sample, the skin substitute film, the evaluation number, and the sample application condition.
- the evaluation apparatus, evaluation spectrum, evaluation wavelength, wavelength step, measurement location in the skin substitute membrane surface, number of measurements, data analysis from the evaluation spectrum, and simple in vitro SPF calculation method are also the same as in the above-described evaluation method 1. Conditions can be set.
- the data having a CV value of 20% or less is used as effective data, the average value in the effective data is obtained for each plate, and the average value between the plates is obtained. Further, a 95% confidence interval (95% CI) is obtained based on the average value, standard deviation, and number of valid data at this time. Finally, it passes (OK) when it shows CIn ′ [%] of less than 17% of the average simple in vitro SPF, and fails (NG) when it is 17% or more.
- the SPF test is started by first testing the test material with n 'skin substitute membranes (n' must be at least 10).
- s ⁇ [( ⁇ (SPFi 2 ) ⁇ (( ⁇ SPFi) 2 / n)) / (n ⁇ 1)]
- the 95% confidence interval (95% CI) of the average SPF is expressed by the following formula.
- CIn ′ SPFn′ ⁇ cn ′ to SPFn ′ + cn ′
- cn ′ tn ′ ⁇ sn ′ / ⁇ n ′
- sn ′ is the standard deviation of the first n ′ skin substitute membranes.
- sn ′ ⁇ [( ⁇ (SPFi 2 ) ⁇ (( ⁇ SPFi) 2 / n ′)) / (n′ ⁇ 1)]
- CIn ′ [%] 100 ⁇ cn ′ / SPFn ′
- n ′ is the total number of valid data
- Evaluation method 3 Absolute Value Evaluation by Simple In Vitro SPF Value> Next, the absolute value evaluation based on the simple in vitro SPF value which is the evaluation method 3 will be described. Evaluation method 3 uses the above-mentioned P3 sample as its contents, and performs five evaluations by 10 evaluation experts, and performs a five-level evaluation (5 is the highest score).
- conditions similar to those of the evaluation method 1 described above can be set as the sample, the skin substitute film, the evaluation number, and the sample application condition.
- the evaluation apparatus, evaluation spectrum, evaluation wavelength, wavelength step, measurement location in the skin substitute membrane surface, number of measurements, data analysis from the evaluation spectrum, and simple in vitro SPF calculation method are also the same as in the above-described evaluation method 1. Conditions can be set.
- an average value of 5 locations is calculated for each skin substitute film to which the sample is applied, and the acceptance of the standard width is confirmed based on the average value of 10 or more sheets. Specifically, the acceptance to the standard width of the average value of 10 sheets or more is confirmed, and when it is 13.0 or more and less than 18.0, it is considered as pass (OK), and less than 13.0 or 18.0 or more In such a case, it will be judged as rejected (NG).
- Evaluation method 4 performs final numerical evaluation using an in vitro SPF evaluation device as absolute value accuracy evaluation.
- the above-mentioned P3 sample is used, and five evaluations are performed by 10 evaluation experts, and a five-level evaluation (5 is the highest score) is performed.
- conditions similar to those of the evaluation method 1 described above can be set as the sample, the skin substitute film, the evaluation number, and the sample application condition.
- a coating evaluation apparatus in the evaluation method 4 for example, an evaluation apparatus described in publicly known literature (Y. Miura et.al., Photochemistry and Photobiology, 2008, 84: 1569-1575) can be used.
- Uses a spectral transmission spectrum the evaluation wavelength is 290 to 400 nm, and the wavelength step is 1 to 5 nm, preferably 1 nm.
- one place for example, the central portion set in advance is used as the measurement place in the skin substitute membrane surface.
- the number of measurements is one per location. In this apparatus, since time is required for measurement, the measurement is performed once so that the drying time after coating can be made constant.
- the in vitro SPF calculation method in the evaluation method 4 is based on the evaluation algorithm described in, for example, the above-mentioned publicly known document (Y. Miura et.al., Photochemistry and Photobiology, 2008, 84: 1569-1575).
- This is an algorithm in which 1 MED (minimum erythema amount) is used as an evaluation end point by integrating the transmitted light with time while continuously irradiating the sample with light, similarly to in vivo SPF.
- the average value of in vitro SPF is “less than 11.7, or When the value is “20.7 or more”, the content can be set to the evaluation value “1”.
- the content is set as an evaluation value “2”
- the in vitro SPF When the average value is “12.7 or more and less than 13.7, or 18.7 or more and less than 19.7”, the content is set as the evaluation value “3”, and the in vitro SPF average value is “13.
- the content is set to an evaluation value“ 4 ”, and the in vitro SPF average value is“ 15.2 or more and 17.2 ”.
- the value is “less than”, the content can be set to the evaluation value “5”.
- an upper limit, a lower limit, and an optimum width can be set for various conditions in the various sample application conditions described above, and evaluation can be performed by comparing the set numerical values with actual measured values. Accordingly, in the example or the comparative example shown in FIG. 7A, when the numerical value exceeds the upper limit and lower limit ranges shown in FIG. 7C, the portion was highlighted, resulting in a failure (NG). The part can be extracted easily.
- the present embodiment it is possible to provide a clear training means for each individual to improve the reproducibility of application. Furthermore, in the present embodiment, by providing the following training determination tool or the like as the determination means 36, it is formalized how much training is applied to the applicator to reach the pass level. It can be determined easily and with high accuracy.
- the in vitro SPF is determined by a method using a spectrophotometer or the like, a numerical value corresponding to a simple in vitro SPF that does not consider light degradation, a method using an in vitro SPF measuring device, or the like. Acquired, for example, at the stage where both “data variation is within the specified range (reproducibility)” and “obtained spectral SPF value is within the specified range (prediction accuracy)” (training completed) ).
- FIG. 8 is a diagram illustrating an example of display of the measurement result of the in vitro SPF value at the five application locations for each application substrate and the measurement value determination result by the training determination tool in the present embodiment.
- Display of measurement results of in vitro SPF values at the five coating locations on each coated substrate and the measured value judgment results using the training judgment tool in the present embodiment is realized by, for example, commercially available spreadsheet software or a uniquely developed application. it can.
- the measurement result of the simple in vitro SPF value is obtained for five application locations for each application substrate using the above-described evaluation method 1.
- numbers 13 to 30 of the coated substrates are displayed as “13 to 30” in one line, but in reality, 18 lines from number 13 to number 30 of the coated substrates are numbered 1 to number. It is a table that exists individually following 12 rows up to 12. For the sake of simplicity, the measured values of the coated substrate Nos. 13 to 30 are omitted, and are indicated by “ ⁇ ” instead.
- “number of valid data”, “average value of valid data”, “standard deviation of valid data”, “average value of standard deviation of valid data”, etc. can be displayed.
- the “number of effective data” is 10 from the numbers 2, 3, 5 to 12 of the coated substrate, the corresponding “average value of effective data”, “standard deviation of effective data”, and “effective data” The average value of the standard deviation "is illustrated.
- evaluation value determination settings such as “1. Application in-plane variation evaluation”, “2. Application substrate variation evaluation”, “Simple in vitro SPF value absolute value evaluation”, “4. Evaluation can be made. For example, the determination result when “OK” or “NG” is determined with the CV value of 20% or less as valid data is “OK” on a cell such as a spreadsheet software as shown in FIG. Or “NG”.
- the “average value”, “standard deviation”, “number of test persons”, etc. as a whole can be calculated. Furthermore, by highlighting an important part as a calculation result, the determination result can be recognized more easily.
- FIG. 8 illustrates a training result determination tool. According to this determination tool, it is possible to determine training and evaluate the result of training as follows. It is necessary to apply at least 10 sheets. (1) When the CV value is 20% or less, “OK” is counted as valid data. (2) At least, the valid data can be determined using 10 examples. ) The upper limit is 30 including the number of rejects. If “4. Comprehensive judgment” is not OK at this point, retest.
- the content of the training determination tool described above is not particularly limited thereto, and for example, a determination tool corresponding to the evaluation method 2 described above may be provided.
- the training determination tool creates an evaluation sheet with a macro for executing the above-mentioned contents by using spreadsheet software, and inputs data into the appropriate area (cell), thereby enabling efficient and easy appropriate calculation. After that, an accurate evaluation can be performed based on the result.
- a method for applying a skin external preparation for improving the reproducibility when applying the skin external preparation to the skin or a skin substitute film, and an application evaluation method, an application evaluation apparatus using the method, And an application evaluation program can be provided.
- the application evaluation was performed using an apparatus for evaluating ultraviolet transmission and / or reflection characteristics of the external preparation for skin.
- the present invention is not particularly limited thereto, and other characteristics are provided. Application evaluation can be performed using this.
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Abstract
Description
本発明は、化粧品等の皮膚外用剤を皮膚又は皮膚代替膜等の所定部位に塗布する際、熟練者のノウハウや経験を形式知化し、全く塗布の経験のない場合でも極めて短期間に再現性が高いデータを取得できるように、明確な方法やトレーニング手段を体系的に構築する。これにより、塗布の再現性が高まり、結果としてin vitro SPF測定等のデータの再現性を高くすることができる。
まず、サンスクリーン剤(化粧品)の塗布方法について、図を用いて説明する。なお、以下に説明する皮膚代替膜については、本実施形態においては、以下のものを用いることとする。
皮膚代替膜にグリセリンを一定量(1mg/cm2)塗布した際、塗布前後において290~400nmにおける各波長の透過率差が20%以内であることとする。
次に、In vitro SPF評価におけるサンスクリーン剤の塗布の平準化を実現するための具体的な塗布方法について、フローチャートを用いて説明する。図1は、本実施形態における塗布方法の一例を示すフローチャートである。
更に、塗布者の塗布するときの姿勢は、背筋を伸ばし、脇を閉め、指サックを嵌めた人差し指を伸ばした状態で皮膚代替膜との接触面は指の腹部より先の部分で塗布を行うのが好ましい。なお、実際に塗布者にトレーニングさせてからサンスクリーン剤等を塗布させる場合には、例えばビデオ等の動画や熟練者による実演等により実際の指の動作を見させて学習させるのが好ましい。
ここで、上述した塗布方法の詳細について説明する。まず、S04の処理に対応する全体的に塗り広げるために要する時間は、約3~20秒間がよく、より具体的には約10秒間が好ましい。これは、3秒以内であると秤量時にのせたスポットが全体的に十分に行き渡らず不均一な塗布となり、20秒を超えて全体的に塗り広げると、その後に一定方向にて塗布する時間が短くなってしまい、結果的に不均一な塗布となってしまうからである。
ここで、上述した塗布手順による塗布時の注意事項について説明する。塗布時における塗布者の手の状態は、上述した塗布方法にしたがって、塗り込む力を一定にするようにする。具体的には、塗布者がサンプルを塗布する指(人差し指)は、皮膚代替膜上に添える程度とする。また、力加減によって得られるSPF値が大きく変化することがあるため、塗布者は常に一定の条件を心がけるようにする。また、塗りこむ際には、1方向と定め皮膚代替膜上を指で往復させても構わないが、サンプルが側面に溜まり、ムラになりやすいため、1方向に塗布して皮膚代替膜上を指で往復させないほうが好ましい。
また、上述した塗布方法のS08の処理について説明する。S08の処理では、塗布終了時より15分間暗所・室温で放置することで塗布代替膜に塗布したサンプルを毎回同一条件にて乾燥させる。また、上述した乾燥処理が終了後、SPF評価に移行する。
塗布評価装置としては、例えば皮膚外用剤の紫外線の透過特性及び/又は反射特性の評価装置を用いることができ、特に限定されないが、例えば特許文献2(特開2008-96151号公報)、特許文献3(特開2008-111834号公報)に開示されている塗布評価装置を用いることができる。これらの装置を利用することで、in vivo SPF測定と同様に継続的に光照射しながらサンプル測定ができるため、光劣化現象等がサンプルに生じたとしてもin vivo SPF測定と同様の原理にてin vitro SPF値を求めることが可能となる。
次に、塗布評価装置10の機能構成例について、図を用いて説明する。図4は、本実施形態における塗布評価装置の機能構成の一例を示す図である。図4に示すように、塗布評価装置10は、入力手段31と、出力手段32と、蓄積手段33と、数値取得手段34と、評価値算出手段35と、判定手段36と、送受信手段37と、制御手段38とを有するよう構成されている。
ここで、上述した塗布評価装置10における各構成については、各機能をコンピュータに実行させることができる実行プログラム(塗布評価プログラム)を生成し、例えば汎用のパーソナルコンピュータやサーバ等にその実行プログラムをインストールすることにより、本発明における評価処理等を実現することができる。
次に、本実施形態における塗布評価処理手順について説明する。図6は、本実施形態における塗布評価処理手順の一例を示すフローチャートである。
次に、本実施形態における評価内容の具体例について説明する。図7A、図7B及び図7Cは、本実施形態における評価内容を説明するための図である。
まず、評価手法1として塗布面内ばらつき評価について説明する。塗布面内ばらつき評価は、面内均一性評価として、簡易in vitro SPF値によるばらつきのCV評価を行うためのものである。
次に、評価手法2である塗布基板間ばらつき評価について説明する。この評価方法は、簡易in vitro SPF値によるばらつきの17%検定を行うものである。
ここで、上述の評価手法2で用いられる算出手法について説明する。SPF試験は、初めn'枚の皮膚代替膜を用いて被験資料をテストすることによって始められる(n'は少なくとも10枚でなければならない)。初期のn'枚の皮膚代替膜による暫定平均in vitro SPF(in vitro SPFn')は、SPFn'=(ΣSPFi)/n'となり、またその標準偏差(s)は、以下の式になる。
s=√[(Σ(SPFi2)-((ΣSPFi)2/n))/(n-1)]
また、平均SPFの95%信頼区間(95%CI)は以下の式で表される。
95%CIn'=SPFn'-cn'~SPFn'+cn'
なお、上述のcn'は次のように算出される。
cn'=tn'×sn'/√n'
ここで、sn'は最初のn'枚の皮膚代替膜の標準偏差である。
sn'=√[(Σ(SPFi2)-((ΣSPFi)2/n'))/(n'-1)]
CIn'[%]=100×cn'/SPFn'
ここで、n'は有効データの総数、tn'は自由度ν=(n-1)におけるp=0.05の'two-sided'Student-t分布テーブル等から得られるもので、表計算のためにt値は以下の式によってモデル化できる。
t=2.03+12.7/n1.75(n≧4に対して)
もし、計算された暫定CIn'[%]が暫定in vitro SPFn'の17%未満であれば合格(OK)というものであり、17%以上であれば、CIn'[%]が暫定in vitro SPFn'の17%以下になるまで皮膚代替膜を追加して試験を続ける。最終的に30枚の皮膚代替膜でも達成できないならば、その試験は全部を再度行うこととする。
次に、評価手法3である簡易in vitro SPF値による絶対値評価について説明する。評価手法3は、その内容として、上述のP3サンプルを使用し、評価専門家10名により各5枚実施し5段階評価(5が最高点)を行う。
次に、評価手法4である最終評価法について説明する。評価手法4は、絶対値精度評価として、in vitro SPF評価装置を用いた最終数値評価を行う。
まず、皮膚外用剤塗布の再現性を向上させるトレーニング手順について説明する。まず、塗布者は、標準化された塗布方法に関するマニュアルを読む。次に、塗布者は、平準化された塗布方法に関する動画や実演を確認する。次に、塗布方法の指導者による実演講習に参加し、学び自らの技術として習得する。また、トレーニングシートを用いた塗布方法の実務訓練を行う。
次に、本実施形態における判定手法について説明する。判定手法としては、具体的には、分光光度計等を用いた方法により、光劣化を考慮しない簡易in vitro SPFに相当する数値やIn vitro SPF測定装置を用いた方法等により、in vitro SPFを得て、例えば「データのばらつきが規格範囲内にあること(再現性)」、「得られる分光SPF値が規格範囲内にあること(予測精度)」の両方を満たした段階で合格(トレーニング完了)とする。
最低でも10枚塗布を要することとし、(1)CV値が20%以下は「OK」として有効データとしてカウントし、(2)最低でも有効データを10例を用いて判定を可能にし、(3)不合格の枚数も含めて30枚を上限とし、この時点で「4.総合判定」がOKでない場合には、再試験を行う。
10 塗布評価装置
11 光源
12 フィルタ
13 光ファイバ
14 照射ポート
15 皮膚外用剤
17 検出ポート
18 光ファイバ
19 分光器
20 光検出器
21 電気信号処理・塗布評価処理部(電算機)
22 ロックインアンプ
23 光チョッパ
24 積分球
31 入力手段
32 出力手段
33 蓄積手段
34 数値取得手段
35 評価値算出手段
36 判定手段
37 送受信手段
38 制御手段
41 入力装置
42 出力装置
43 ドライブ装置
44 補助記憶装置
45 メモリ装置
46 CPU
47 ネットワーク接続装置
48 記録媒体
Claims (11)
- 皮膚又は皮膚代替膜に皮膚外用剤を塗布し、塗布された前記皮膚代替膜に光を照射して得られる前記皮膚外用剤における特性を評価するための皮膚外用剤の塗布方法において、
前記皮膚又は皮膚代替膜上の側面から一方向に塗り広げていく第1塗布手順と、
前記第1塗布手順により塗り広げた方向と垂直な方向から1方向に塗り広げる第2塗布手順と、
前記第1塗布手順及び前記第2塗布手順を所定回数繰り返し行う繰り返し手順とを有することを特徴とする塗布方法。 - 前記第1塗布手順及び前記第2の塗布手順は、
全体的に塗り広げるために要する時間を、約1秒間に0.5~5ストロークを基準とし、1サイクルを約3~20秒として、塗布開始から約30~90秒間で全ての塗布作業を終了させることを特徴とする請求項1に記載の塗布方法。 - 請求項1に記載の塗布方法により塗布された皮膚又は皮膚代替膜を用いた塗布評価方法において、
前記皮膚又は皮膚代替膜に光を照射して得られる透過光の強度又は透過率、或いは反射光の強度又は反射率を数値化して取得する数値取得手順と、
前記数値取得手順により得られる数値を複数回取得し、取得した複数の数値から塗布面内ばらつき評価、塗布基板間ばらつき評価、簡易in vitro SPF値による絶対値評価、及びin vitro SPF評価装置を用いた最終数値評価のうち少なくとも1つを行うための評価値を算出する評価値算出手順と、
前記評価値算出手順により算出される評価結果に基づいて、前記皮膚外用剤の皮膚代替膜への塗布が正確に行われたか否かを判定する判定手順とを有することを特徴とする評価方法。 - 前記評価値算出手順は、
前記塗布面内ばらつき評価として、簡易in vitro SPF値によるばらつきのCV評価値を算出することを特徴とする請求項3に記載の評価方法。 - 前記評価値算出手順は、
前記塗布基板間ばらつき評価として、簡易in vitro SPF値によるばらつきの17%検定を行うことを特徴とする請求項3に記載の評価方法。 - 皮膚又は皮膚代替膜に皮膚外用剤を塗布し、塗布された前記皮膚代替膜に光を照射して得られる前記皮膚外用剤における特性を評価するための塗布評価装置において、
前記皮膚又は皮膚代替膜に光を照射して得られる透過光の強度又は透過率、或いは反射光の強度又は反射率を数値化して取得する数値取得手段と、
前記数値取得手段により得られる数値を複数回取得し、取得した複数の数値から塗布面内ばらつき評価、塗布基板間ばらつき評価、簡易in vitro SPF値による絶対値評価、及びin vitro SPF評価装置を用いた最終数値評価のうち少なくとも1つを行うための評価値を算出する評価値算出手段と、
前記評価値算出手段により算出される評価結果に基づいて、前記皮膚外用剤の皮膚又は皮膚代替膜への塗布が正確に行われたか否かを判定する判定手段とを有することを特徴とする塗布評価装置。 - 前記評価値算出手段は、
前記塗布面内ばらつき評価として、簡易in vitro SPF値によるばらつきのCV評価値を算出することを特徴とする請求項6に記載の塗布評価装置。 - 前記評価値算出手段は、
前記塗布基板間ばらつき評価として、簡易in vitro SPF値によるばらつきの17%検定を行うことを特徴とする請求項6に記載の塗布評価装置。 - 皮膚又は皮膚代替膜に皮膚外用剤を塗布し、塗布された前記皮膚又は皮膚代替膜に光を照射して得られる前記皮膚外用剤における特性を評価するための塗布評価プログラムにおいて、
コンピュータを、
前記皮膚又は皮膚代替膜に光を照射して得られる透過光の強度又は透過率、或いは反射光の強度又は反射率を数値化して取得する数値取得手段、
前記数値取得手段により得られる数値を複数回取得し、取得した複数の数値から塗布面内ばらつき評価、塗布基板間ばらつき評価、簡易in vitro SPF値による絶対値評価、及びin vitro SPF評価装置を用いた最終数値評価のうち少なくとも1つを行うための評価値を算出する評価値算出手段、及び、
前記評価値算出手段により算出される評価結果に基づいて、前記皮膚外用剤の皮膚又は皮膚代替膜への塗布が正確に行われたか否かを判定する判定手段として機能させるための塗布評価プログラム。 - 前記評価値算出手段は、
前記塗布面内ばらつき評価として、簡易in vitro SPF値によるばらつきのCV評価値を算出することを特徴とする請求項9に記載の塗布評価プログラム。 - 前記評価値算出手段は、
前記塗布基板間ばらつき評価として、簡易in vitro SPF値によるばらつきの17%検定を行うことを特徴とする請求項9に記載の塗布評価プログラム。
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CN2010800146925A CN102369429A (zh) | 2009-03-30 | 2010-03-30 | 皮肤外用剂的涂敷方法及根据该方法的涂敷评价方法、涂敷评价装置、以及涂敷评价程序 |
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JP2015188665A (ja) * | 2014-03-28 | 2015-11-02 | 富士フイルム株式会社 | 塗布材料の光学特性の測定システム、測定方法、測定装置、および積層構造体 |
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Also Published As
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KR20120002571A (ko) | 2012-01-06 |
CN102369429A (zh) | 2012-03-07 |
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AU2010231634A1 (en) | 2011-11-03 |
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US20120022472A1 (en) | 2012-01-26 |
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