JP2014121605A - Method of determining skin type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of determining a skin type by measuring the temperature and thickness of a skin.SOLUTION: This invention relates to a novel method to determine a skin type by the constitution of a skin, the determination method including the steps of measuring the temperature and thickness of a skin, determining a skin constitution group to which measured values belong, and predicting a skin type according to a skin constitution group.

Description

  The content described in this specification relates to a novel method for discriminating skin types according to skin constitution.

  The skin is roughly divided into three layers, the epidermis, dermis, and subcutaneous adipose tissue in order from the outside, and functions to protect the human body from physical and chemical stimuli from the external environment. It adjusts that about 65-70% of the water it has evaporates out of the body. Among them, the epidermis is divided into the stratum corneum, granule layer, spiny layer, and basal layer in order from the outside, but the stratum corneum layer of the epidermis contains about 10-20% water and exists in the outermost shell of the human body. In this way, moisture evaporation from the body is suppressed, while excessive permeation of substances from the outside is blocked (J. Invest. Dermato 80 (Suppl.), 44-49, 1983). The cells that make up the stratum corneum have a high concentration of natural moisturizing factor (NMF), which is a water-soluble component. Help to maintain proper moisture (J. Invest. Dermatol. 54, 24-31, 1970).

  However, because the constitution of the skin, such as the temperature and thickness, varies from person to person, these internal factors may cause differences in the skin constitution, such as the amount of moisture and oil in the skin, elasticity, and roughness. The stratum corneum is also affected by external factors such as changes in the environment or lifestyle patterns, various stresses that occur in social life, environmental pollution, frequent face washing associated with makeup habits, and natural skin aging associated with increasing age. As the moisture decreases, the skin becomes dry, the surface becomes rough, and the skin loses its moisture and appears dull. Also, the influence of external factors on the skin may vary depending on internal factors such as the individual's skin constitution.

  Therefore, in order to maintain and improve the fundamental skin type, it is necessary to grasp the skin constitution and select a method suitable for it.

J. et al. Invest. Dermatol. 80 (Suppl.), 44-49, 1983. J. et al. Invest. Dermatol. 54, 24-31, 1970.

  It is an object of the present invention to provide a novel method for discriminating skin types based on skin constitution.

  In order to achieve the above object, an embodiment of the present invention provides a method for discriminating skin types including measuring skin temperature and thickness.

Also, one embodiment of the present invention is
(A) measuring the temperature and thickness of the subject skin;
(B) determining a skin constitution group to which the measurement value belongs; and
(C) A skin type discrimination method including a step of predicting a skin type according to a skin constitution group is provided.

  The method of the present invention provides an effect that skin types such as skin moisture, oil content, roughness, elasticity and the like can be easily predicted only by measuring skin temperature and thickness.

  Thereby, using the predicted skin type result, cosmetics and medicines suitable for the skin type can be selected, and the usage amount, usage order, use time, etc. can be determined.

  In addition, the skin type can be easily managed and maintained, and the desired skin condition can be fundamentally supplemented and improved. Therefore, it can be used in various ways in the cosmetics and pharmaceutical fields.

FIG. 5 is a diagram illustrating a method of measuring skin temperature and thickness according to an embodiment of the present invention, and showing a difference in moisture content of the skin. FIG. 5 is a diagram illustrating a method according to an embodiment of the present invention, in which skin temperature and thickness are measured and a difference in skin oil content is shown. FIG. 5 is a diagram illustrating a method of measuring skin temperature and thickness according to an embodiment of the present invention, and showing a difference in skin roughness according to the measured temperature and thickness; FIG. 6 is a diagram illustrating a method of measuring skin temperature and thickness according to an embodiment of the present invention, and illustrating a difference in skin elasticity.

  In the present specification, “skin” means a tissue covering the body surface of an animal, and is the broadest concept including not only the tissue covering the body surface such as the face or body, but also the scalp and hair. is there.

  Hereinafter, the present invention will be described in detail.

  One embodiment of the present invention provides a method for determining skin type, which includes measuring skin temperature and thickness.

Also, one embodiment of the present invention is
(A) measuring the temperature and thickness of the subject skin;
(B) determining a skin constitution group to which the measurement value belongs; and
(C) predicting the skin type according to the skin constitution group;
The skin type may be determined by a method including

Also, as an embodiment of the present invention, the method includes the steps before step (a):
(A) ′ may further include a step of dividing into a plurality of skin constitutional groups according to the skin type and predetermining characteristics of the skin type of each skin constitutional group.

The skin constitution group can be divided on the basis of, for example, normal skin temperature and skin thickness, when the skin temperature is more than 30 ° C. and less than 31 ° C., and the skin thickness is more than 3 mm and less than 3.5 mm. . Using the skin temperature and thickness range as a reference point, the skin constitution group is
Group 1 where the skin temperature is below the reference point and the skin thickness is above the reference point;
Group 2 where the skin temperature is above the reference point and the skin thickness is below the reference point;
Group 3 with skin temperature above reference point and skin thickness above reference point; and Group 4 with skin temperature below reference point and skin thickness below reference point;
May be included.

  The skin types determined by the method of one embodiment of the present invention include all skin types that can be distinguished without limitation. Examples of skin types include skin moisture, oil content, roughness, elasticity, degree of inflammation, degree of skin keratin, and amount of transdermal moisture loss.

  In the method according to an embodiment of the present invention, the skin to be measured is not particularly limited, and includes all tissues covering the body surface of the body, in addition to the face, hands, scalp, and the like. In addition, the skin structure may include not only the epidermis and dermis but also subcutaneous fat.

  At this time, the method for measuring the temperature and thickness of the target skin is not particularly limited, and may be measured by any method commonly used in the art.

  According to an embodiment of the present invention, the skin type may be predicted according to the degree of skin temperature. For example, if the skin temperature is lower than the reference temperature, the moisture sensation of the skin may be lower than that of normal skin, and if the temperature is higher than the reference temperature, the moisture sensation may be predicted to be higher than that of normal skin. Further, if the skin temperature is lower than the reference temperature, the oil amount may be lower than that of normal skin, and if the skin temperature is higher than the reference temperature, the skin oil amount may be expected to be higher than that of normal skin. Furthermore, if the skin temperature is lower than the reference temperature, the elasticity of the skin may be lower than that of normal skin, and if the skin temperature is higher than the reference temperature, the elasticity of the skin may be expected to be higher than that of normal skin.

  According to another embodiment of the present invention, the skin type may be predicted according to the degree of skin thickness. For example, if the skin thickness is thinner than the reference thickness, the oil content may be lower than that of normal skin, and if it is thicker than the reference thickness, the skin oil content may be expected to be higher than that of normal skin. If the skin thickness is thinner than the reference thickness, the skin roughness is less than that of normal skin. If the skin thickness is greater than the reference thickness, the skin roughness is expected to be higher than that of normal skin. It's okay. Furthermore, if the skin thickness is thinner than the reference thickness, the elasticity of the skin is lower than that of normal skin, and if it is thicker than the reference thickness, the elasticity of the skin may be expected to be higher than that of normal skin. .

  Therefore, according to one embodiment of the present invention, if the target skin belongs to the group 1 of the skin constitution group, the skin has one of low moisture feeling and high roughness compared to normal skin. If the skin belongs to group 2, it can be predicted that the skin has either a high moisture feeling or a high elasticity compared to normal skin.

  Further, if the target skin belongs to group 3 of the skin constitution group, it is predicted that the skin has one or more of a high moisture feeling, a high oil content, a high roughness, and a high elasticity compared to normal skin. If the skin belongs to group 4, it can be predicted that the skin has any one or more of low moisture feeling, low oil content and low elasticity compared to normal skin.

  Thus, according to the skin type discrimination method of the present invention, the skin type is grasped only by measuring the skin temperature and thickness, etc., and the skin type such as skin moisture, oil content, roughness, elasticity, etc. can be easily determined. This provides an effect that can be predicted.

  Thus, by predicting the skin type using the method according to the present invention, the type and usage of cosmetics or medicines suitable for the skin type can be selected, and the skin type can be easily maintained or improved.

  Hereinafter, the present invention will be described through the following examples and experimental examples. Examples and experimental examples are provided to explain the present invention in more detail, and the scope of the present invention is not limited to the scope of the following examples.

  Further, anyone having ordinary knowledge in this technical field can make various modifications and imitations within the scope of the appended claims without leaving the category of the technical idea of the present invention. Is an obvious fact.

  In order to divide into skin constitution groups according to skin types and to determine the skin type characteristics of each skin constitution group in advance, Examples 1 to 4 were carried out.

[Example 1] Measurement of moisture content by skin temperature and thickness An experiment was conducted to measure the moisture content by skin temperature and thickness.

  The amount of water in the skin was measured using Corneometer CM 825 (C & K Electronic GmbH, Germany), which is a device for measuring capacitance in vivo. Before the measurement, the skin of the test subject was washed with a cleansing agent and then rested for 20 minutes in a constant temperature and humidity room (20 to 21 ° C., 48 to 50%), and then the evaluation was performed. The average value was obtained by measuring the cheek front of the face three times.

  As a result of the measurement, as shown in FIG. 1, the skin whose temperature is lower than the reference point of 30 ° C. is measured to have a very low water content of about 34 to 38 Skin Capacitance (AU) ( The moisture content of the skin was about 43-46 Skin Capacitance (AU) in the skin whose temperature was above the reference point at 32 ° C. (moisture_heat in FIG. 1). .

  In addition, the skin whose skin thickness is the reference point of 3.5 mm or more has a skin moisture amount of about 41 to 46 Skin Capacitance (AU) (water_thickness in FIG. 1), and the skin thickness is the reference point. Skin that was less than 3 mm was measured to have a skin moisture content of about 43-45 Skin Capacitance (AU) (moisture_thin in FIG. 1).

  Summing up the results, the amount of moisture in the skin is mainly affected by the temperature of the skin, and Group 1 and Group 4 whose skin temperature is below the reference point have a lower moisture sensation than normal skin. It can be predicted that the group 2 and the group 3 whose skin temperature is equal to or higher than the reference point have higher moisture feeling than normal skin.

[Example 2] Measurement of oil content by skin temperature and thickness An experiment was conducted to measure the oil content by skin temperature and thickness.

The amount of oil in the skin was measured using Sebetter (MPA580, C + K, Germany), and the amount of sebum attached to the skin surface of the test subject in contact with the translucent Sebum tape was measured by the optical reflection principle. The translucent Sebum tape was exchanged for each measurement, and the numerical value shown after the skin measurement was expressed in μg / cm ² . In this experiment, a value obtained by measuring the skin surface at the same position once was used as a measurement value.

  As a result of the measurement, as shown in FIG. 2, the skin whose temperature is lower than the reference point 30 ° C. is measured to have a skin oil content of about 13 to 20 sub content (AU) (see FIG. 2). 2), the skin whose temperature is above the reference point at 32 ° C. was measured to have a relatively high skin oil content of about 25-29 Sebum content (AU) (oil_heat in FIG. 2). ).

  In addition, the skin whose skin thickness is a reference point of 3.5 mm or more has a skin oil amount of about 32 to 41 Sebum content (AU), which is measured as very high (oil content_thickness in FIG. 2). Skin whose thickness was less than 3 mm below the reference point was measured to have a skin oil content of about 12-19 Sebum content (AU) (oil_thin in FIG. 2).

  Taken together, the skin oil content is influenced by both skin temperature and thickness, and in particular, it is greatly influenced by skin thickness. Therefore, the group 3 in which the skin temperature is equal to or higher than the reference point and the skin thickness is equal to or higher than the reference point has a higher oily feeling than the normal skin, and the skin temperature is equal to or lower than the reference point. In addition, it can be predicted that the group 4 whose skin thickness is equal to or less than the reference point has a lower oily feeling than that of normal skin.

[Example 3] Measurement of skin roughness by skin temperature and thickness An experiment was conducted to measure skin roughness by skin temperature and thickness.

  The roughness of the skin was measured by measuring the facial part at each evaluation time point using PRIMOS (Phase Rapid In vivo Measurement Of Skin, GF Measurement Tech GmbH, Germany), which is a three-dimensional skin measuring instrument for light. PRIMOS's three-dimensional measurement can be performed by utilizing the fact that the parallel projection stripes projected onto the skin change according to the difference in the height of the skin surface, and the roughness of the skin indicates the degree of the change. It can be obtained quantitatively on a computer connected together. At this time, if the value of the variable increases, it means that the texture of the skin is rough.

  As a result of the measurement, as shown in FIG. 3, the skin whose temperature is lower than the reference point 30 ° C. is measured to have a skin roughness of about 3 to 4 Ra (μm) (the skin texture of FIG. Cold), the skin whose temperature is above the reference point at 32 ° C., the roughness of the skin was measured similarly to about 2 to 4 Ra (μm) (skin texture_fever in FIG. 3).

  In addition, the skin whose skin thickness is the reference point of 3.5 mm or more is measured with a high skin roughness of about 4 to 10 Ra (μm) (skin texture_thickness in FIG. 3). The skin having a skin roughness of less than 3 mm below the reference point was measured to have a relatively low skin roughness of about 3 to 9 Ra (μm) (skin texture_thin in FIG. 3).

  Taken together, these results mean that skin roughness is mainly influenced by skin thickness. Therefore, groups 1 and 3 whose skin thickness is equal to or higher than the reference point have higher roughness than normal skin, and groups 2 and 4 whose skin thickness is equal to or lower than the reference point are normal. It can be predicted that it has a lower roughness than that of fresh skin.

[Example 4] Measurement of skin elasticity by skin temperature and thickness An experiment was conducted to measure skin elasticity by skin temperature and thickness.

  Skin elasticity was measured using a Cutometer MPA580. The Cutometer MPA580 is a device that sucks the skin with negative pressure and measures and evaluates the elasticity of the dermis layer, and applies it to the skin with a negative pressure of 450 mb via a chamber / probe. In this experiment, the measurement was repeated three times for each site on the skin surface at the same position, and the average value was used as the measurement value.

  As a result of the measurement, as shown in FIG. 4, the skin whose temperature is lower than the reference point 30 ° C. is measured to have a skin elasticity as low as about 25 to 32 (AU) (the elasticity of FIG. 4). _Cold), the skin whose temperature was above the reference point at 32 ° C., the skin elasticity was measured as relatively high as about 30-36 (AU) (elasticity_heat in FIG. 4).

  Further, the skin whose skin thickness is the reference point of 3.5 mm or more is measured with the skin elasticity of about 32 to 39 (AU) (elasticity_thickness in FIG. 4), and the skin thickness is the standard. Skin that was less than 3 mm below the point was measured to have a skin elasticity of about 30-34 (AU) (elasticity_thin in FIG. 4).

  Taken together, the skin elasticity is influenced by both skin temperature and thickness, and in particular, it is greatly influenced by skin temperature. Therefore, group 2 whose skin temperature is higher than the reference point has higher skin elasticity than normal skin, the skin temperature is lower than the reference point, and the skin thickness is lower than the reference point. Group 4 can be expected to have lower skin elasticity compared to normal skin.

[Example 5] Skin type discrimination experiment Based on the skin type discrimination method according to the present invention, the temperature and thickness of the facial skin were measured for 50 adult women aged 35 ± 1.4 years. At this time, the skin temperature was measured by image analysis using an IR camera, and the skin thickness was measured using an expert pinch test and a dedicated scale.

  After measurement, skin temperature remains at the reference point (exceeding 30 ° C and less than 31 ° C), except for women with normal skin temperature and thickness where the skin thickness is the reference point (exceeding 3mm and less than 3.5mm) Two women were selected, and the skin type was determined according to the skin type determination method according to the embodiment of the present invention, and the skin type was confirmed.

  First, in the case of an adult female A whose skin temperature is measured at 32 ° C. and skin thickness is 2.8 mm, the skin temperature is above the reference point and the skin thickness is below the reference point. 2 and was predicted to have one or more of high skin moisture and high skin elasticity. As a result of actually measuring the moisture content and elasticity of the skin, the moisture content of the skin was measured to be about 44 (AU), and the elasticity was about 30 (AU). Higher moisture content and elasticity. Therefore, it was confirmed that the skin type predicted from the skin constitution such as the temperature and thickness of the skin by the method according to one embodiment of the present invention almost coincided with the actual measurement result.

  In the case of an adult woman B whose skin temperature is measured at 32 ° C. and skin thickness is 3.5 mm, the skin temperature is above the reference point and the skin thickness is above the reference point. 3 and was predicted to have one or more of high moisture content, high oil content, high roughness and high elasticity of the skin. As a result of actually measuring the moisture content and elasticity of the skin, the moisture content of the skin was about 45 (AU), the oil content was about 34 (AU), and the roughness was about 7 Ra (μm). Since the elasticity was measured to be about 35 (A.U.), it was shown to have a higher water content and oil content than normal skin, and to have higher roughness and elasticity. Therefore, it was confirmed that the skin type predicted from the skin constitution such as the temperature and thickness of the skin by the method according to one embodiment of the present invention almost coincided with the actual measurement result.

  As described above, according to the skin type discrimination method of the present invention, skin types such as the amount of moisture, oil content, skin roughness and elasticity associated with the skin constitution can be easily predicted.

Claims (12)

  A method for determining a skin type, comprising measuring skin temperature and thickness. The method
(A) measuring the temperature and thickness of the subject skin;
(B) determining a skin constitution group to which the measurement value belongs; and
(C) predicting the skin type according to the skin constitution group;
The skin type discrimination method according to claim 1, comprising: Before step (a),
(A) 'dividing into a plurality of skin constitution groups according to the skin type, and predetermining the characteristics of the skin type of each skin constitution group;
The skin type discrimination method according to claim 2, further comprising: The skin constitution group is
Group 1 where the skin temperature is below the reference point and the skin thickness is above the reference point;
Group 2 where the skin temperature is above the reference point and the skin thickness is below the reference point;
Group 3 with skin temperature above reference point and skin thickness above reference point; and Group 4 with skin temperature below reference point and skin thickness below reference point;
The method for discriminating skin types according to claim 3, comprising:   The skin type reference method according to any one of claims 2 to 4, wherein the skin temperature reference point is 30 to 31 ° C, and the skin thickness reference point is 3 to 3.5 mm.   The skin type discriminated according to any one of claims 1 to 5, wherein the skin type to be discriminated is at least one of water content, oil content, roughness and elasticity of the skin. Method.   The skin type determination method according to any one of claims 1 to 6, wherein the skin to be measured is skin of a hand or a face.   The skin type discrimination method according to any one of claims 1 to 7, wherein the skin is a skin epidermis.   In the case of group 1 in the skin constitution group, the skin is predicted to have any one or more of a low water content and a high roughness as compared to normal skin. The method for distinguishing skin types described in 1.   In the case of group 2 in the skin constitution group, the skin is predicted to have any one or more of a high water content and a high elasticity compared to normal skin, according to any one of claims 4 to 8. The method for distinguishing the skin type as described.   In the case of group 3 among the skin constitution group, the skin is predicted to have one or more of a high water content, a high oil content, a high roughness, and a high elasticity as compared with normal skin. The discrimination method of the skin type as described in any one of -8. In the case of group 4 in the skin constitution group, the skin is predicted to have any one or more of a low water content, a low oil content, and a low elasticity compared to normal skin. The method for discriminating skin types according to claim 1.

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