CN105266819A - Composition for New Latent Fingerprint Detector Comprising Food Dyes - Google Patents
Composition for New Latent Fingerprint Detector Comprising Food Dyes Download PDFInfo
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- CN105266819A CN105266819A CN201510411813.4A CN201510411813A CN105266819A CN 105266819 A CN105266819 A CN 105266819A CN 201510411813 A CN201510411813 A CN 201510411813A CN 105266819 A CN105266819 A CN 105266819A
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- China
- Prior art keywords
- finger prints
- developing latent
- latent finger
- compositions
- food colour
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/117—Identification of persons
- A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
- A61B5/1172—Identification of persons based on the shapes or appearances of their bodies or parts thereof using fingerprinting
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B69/00—Dyes not provided for by a single group of this subclass
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
- G03F7/0325—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polysaccharides, e.g. cellulose
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
Abstract
The invention relates to a composition for a novel latent fingerprint insufflator, which displays remarkably improved insufflation efficiency in limited various conditions and circumstances that existing latent fingerprint insufflators show low insufflation efficiency, and which is harmless to a human body to be safely used. More specifically, the composition comprises one or more selected from food dyes described in Table 1.
Description
Technical field
The present invention relates to new developing latent finger prints compositions, above-mentioned new developing latent finger prints compositions can under existing developing latent finger prints agent presents the low multiple confined conditions and environment manifesting efficiency, present and superior present efficiency and harmless, thus can use safely.
Background technology
Searching on-the-spot first motion in crime searches in step, the material that the laten fingerprints left over using variform in the fine evidence collected forms as inorganic matter (0.5%) and the nonpolar Organic substance (1%) by moisture (98.5%) and the micro-polarity existed, the object of prepreerence evidence-gathering is together become with gene (DNA, Deoxyribonucleicacid) analysis Biosample.The complexity of developing latent finger prints, the resolution of many factors on developing latent finger prints be difficult to resolve produce highstrung impact.The complexity of above-mentioned developing latent finger prints, the many factors be difficult to resolve comprise: the kind of the visualization reagent 1) used and according to the physics of its characteristic and chemical method; 2) how many degree of the fingerprint component content left over; 3) constituent, 4 of material left over of laten fingerprints) color of material left over of laten fingerprints; 5) whether there is the porous forming above-mentioned material surface and porous size degree.To this, as the objective testimonial material that science is searched, although manifesting of laten fingerprints is important, in polytype laten fingerprints, be tested and appraised work, with can the high resolution of level of interpretation feature, obtain manifesting result and be really difficult to.
The process for show of laten fingerprints is divided into three kinds of methods such as optical means, physical method and chemical method.1) optical means uses qualification light source (laser (LASER), ultraviolet (UV, (UltravioletRays)) or alternative light source (ALS; AlternativeLightSource) method, 2) physical method is the method utilizing pressed powder (black powder, fluorescent powder, Magnaglo, fluorescence magnetic powder, nanometer (Nano) powder and thermoplasticity (Thermoplastic) powder etc.).And, 3) chemical method carries out the method for reacting as utilizing with chemical reagent, 1,2,3-indantrione monohydrate (Ninhydrin) method, cyanoacrylate adhesive (CA, Cyanoacrylate) fumigation and steaming method, iodine method, silver nitrate (AgNO can be exemplified
3) solwution method, Sudan black B (SudanBlack) method, vacuum vapour deposition, osmic acid (Osmicacid) method, substantially redness (BasicRed) 28 solwution method, amido black (AmidoBlack) method, 1, 8-phenodiazine-9-Fluorenone (DFO, 1, 8-Diazafluoren-9-one) method, substantially yellow (BasicYellow) 40 solwution method, rhodamine 6G (Rhodamine6G) solwution method, safranine O (SafraninO) solwution method, zinc chloride (Zincchloride) solwution method, crystal violet (CrystalViolet) solwution method, deoxidation-multiple test method such as tittle-tattle oxide remover (Liqui-Arodrox) solwution method and TapeeGlo solwution method.Each multifrequency nature and pluses and minuses are mixed with in above-mentioned test method.
When developing latent finger prints agent is solid (powder) shape dosage form, owing to there is not liquid medium (media), be thus difficult to chemical reaction occurs.Replace these, headed by hydrophobicity van der Waals (VanderWaals) gravitation between coulomb (Coulomb) gravitation of the electron affinity between mutually different ionic substances and apolar-apolar material, by the hydrogen bond etc. between the polar substances that comprises hydrone, powder particle is adsorbed in the surface of laten fingerprints with physical method, thus manifest fingerprint, thus, fingerprint manifestation is weaker than the fingerprint manifestation of chemical reaction.
Chemical method deposits the chromogenic reaction that the result as the chemical reaction utilizing fingerprint composition and detection agent represents, not only in detection resolution, exist and much need to carry out room for improvement, and, also there is the reagent of use and the harmful shortcoming of solvent.Further, owing to being used in solvent by sample dissolution, thus, such as, in sample, there is the content of record, or when laten fingerprints leaves over the material in the such as sensitivity of heat-sensitive paper and so on, the font of occurrence record can spread and sink in or damage the problem of act and deed itself.
Especially, in the laten fingerprints qualification field in the fine evidence that science is searched, following content should be met in order to put the axe in the helve: what 1) developing latent finger prints agent maintenance was good manifests efficiency and avirulence; 2) on the surface of porous material, the manifesting property of laten fingerprints should be good; 3) need leave in human body skin laten fingerprints manifest the large preparation of efficiency.Further, the manifesting property to the laten fingerprints exposed for a long time 4) is maintained; 5) should be good to the manifesting property of the laten fingerprints leaving over evidence in water under water; 6) can to note the horizontal interpretation manifesting efficiency of blood stain fingerprint.Further, need to develop the visualization reagent of multiple color, with the clear and definite image not using other light sources also can obtain laten fingerprints, and the colourity of the background color left over according to laten fingerprints is suitably selected and uses.
Food colour, as avirulence, uses according to law and is restricted.Current Korea S is in and comprises 9 kinds of food colours and 7 kinds of aluminum lake colours, and the state that gets the nod of the food colour of totally 16 kinds, due to the dietary habit of various countries or the difference of culture, thus uses the food colour got the nod different.As be not aluminum color lake grown form food colour Japan have 12 kinds of food colours approved, there are 15 kinds of food colours approved in European Union, there are 9 kinds of food colours approved in the U.S., there are 14 kinds of food colours approved in Codex Alimentarius Commission (Codex), further, the part in above-mentioned food colour gets the nod with the form in aluminum color lake.This pigment in pigment molecular in there is the multiple functional groups such as sulphonate-base, carbonyl, methoxyl group, hydroxyl, imide, amino and aryl, thus estimate the polar substances of the band relative charge comprising metal ion in laten fingerprints and have between aobvious hydrophobic lipid molecular strong interaction occurs, and then expecting the effect to developing latent finger prints.Further, these pigments have guaranteed there is stability, and comprise multiple color, thus according to leaving over the color of evidence of laten fingerprints, utilizing complementary color relationship, when optionally using, can improve and manifest effect.To this, in the past used developing latent finger prints agent manifests effect with it, and gropes the scheme that can overcome the restriction that developing latent finger prints agent in the past has.
Summary of the invention
In order to solve the object of the invention is to of the problem of prior art as above, compositions is provided, above-mentioned composition can when the developing latent finger prints agent utilizing prior art, under the multiple environment manifesting evidence and so in effect low-down porosity surface material or the qualification article exposed for a long time and water-immersed water and condition, manifest laten fingerprints with high-resolution.
And, another object of the present invention is, developing latent finger prints compositions is provided, above-mentioned developing latent finger prints compositions is made up of the compositions of multiple color, to make the background color according to the laten fingerprints left over, and visual outstanding mode, can the color of compositions be selected widely and use, thus, immediately do not use independent light source, can obtain the clear and definite image of the laten fingerprints manifested yet.
Another object of the present invention is to, the stability guaranteed human body is provided, thus the developing latent finger prints compositions that appraiser can use safely.
For reaching the developing latent finger prints compositions of the present invention of above-mentioned object, the feature of above-mentioned developing latent finger prints compositions is, comprises more than one in the food colour described in being selected from table 1.
Table 1
Above-mentioned food colour as the food colour got the nod in Korea S, Japan, U.S. food Drug Administration (FDA) and European Union (EU), 1 ~ 9 be azo dyes, 10 ~ 11 for carbonyl class dye well 12 ~ 15 be triarylmethane dyes.Above-mentioned food colour, except having as except chromophoric azo group, carbonyl and triaryl methane base, also has sulphonate-base (-SO
3 -na
+), the multiple functional group such as hydroxyl, imide, phenyl, methoxyl group and dimethylamino, by the interaction comprising the anionic property of the band relative charge of the metal ion in laten fingerprints and cationic polar substances and have between hydrophobic lipid molecular, manifest laten fingerprints.That is, dye molecule Semi-polarity (-SO
3 -na
+) part the moon (
-) ion as the inorganic matter in fingerprint composition, can by various metals (Na
+, K
+, Ca
++and Mg
++deng) sun of class (
+) coulomb (Coulomb) of ion and electrostatic adsorbs, other functional groups (C=O and N-H) can be adsorbed by the aminoacid (serine (Serine), glycine (Glycine) and ornithine (Ornithine) etc.) in fingerprint composition and the hydrogen bond (H-bond) of carbohydrate (sugar) composition and hydrone.Further, (benzene (phenyl), naphthyl (napthyl) and part cocoa bis-lndolyden) carry out the physical absorption of van der Waals (VanderWaals) gravitation between the molecule caused as the hydrophobic interaction of the hydrocarbon headed by organic lipid fat, glycerol and fatty acid composition in fingerprint composition to nonpolar hydrocarbon.
Preferably, because the dustability of above-mentioned food colour is very large, be thus suitable for rolling, utilizing the black powder of prior art almost in impossible porous stationery, can manifest and imporosity category of glass like the laten fingerprints of degree.
Further, in the present compositions, above-mentioned food colour is as aluminum color lake form, and above-mentioned food colour can be the one in compound described in table 2.For the ease of recording, in the title of table 2, eliminate aluminum color lake (aluminumlake).Such as, in table 2, yellow No. four refers to, yellow No. four aluminum color lake.
Table 2
Aluminum color lake is as the general name of the aluminum salt compound of water solublity food colour, and above-mentioned aluminum color lake is by Liu Suan Aluminum (Al
2(SO4)
3) or aluminum chloride (AlCl
3) add sodium carbonate (NaHCO in salt
3) and the aluminium hydroxide (Al (OH) obtained
3) form preparation.Even if do not use independent additive, the dustability of aluminum lake colours is significantly low, and does not present the tilt phenomenon according to utilizing brush brush, thus utilizes bristle method easily to carry out fingerprint manifestation.There is the reason of this phenomenon likely in expectation, because there is 2-3 sulfonate (-SO3 in each molecule
-na
+) part by with aluminium hydroxide (Al (OH)
3) reaction and the aluminum ((-SO generated
3 -)
3al
+++) part replacement.
Further, relative to more than one food colours be selected from the food colour recorded in table 1 of 100 weight portions, compositions of the present invention also can comprise more than one aluminum color lakes be selected from the aluminum color lake recorded in table 2 of 50 ~ 200 weight portions.Because the dustability of following food colour is very large, thus not easily independent for developing latent finger prints, but, when mixing with aluminum lake colours, maintain the high state of chroma and dustability reduces greatly, thus easily distinguish and the surface color left in the material of laten fingerprints, and then substantially increase and manifest effect.When the mixing ratio in above-mentioned aluminum color lake is low, because dustability is still large, is thus difficult to applicable bristle method, when the mixing ratio in aluminum color lake is too high, manifests effect on the contrary low.
In the examples below, to comprise the state of bonding agent, prepare compositions and have rated and manifest effect, but this is for use simple compact form to prepare dosage form.Do not point out concrete data, but, when use prepare blend compositions without the food colour of bonding agent and aluminum color lake, also can be suitable for bristle method, and fingerprint manifestation effect is higher than the situation in independent use food colour or aluminum color lake.
As mentioned above, when aluminum mixture lake colours and food colour, preferably, the dyestuff of mixed phase homologous series color, to make to maintain high chroma.Wherein, the color of mutual same train refers to, as being contained in the redness of dyestuff title, yellow and blue etc., such as, preferably, yellow No. four aluminum color lake is by No. 4th, the yellow of mixture table 2, more than one food colour mixes and uses in yellow No. five, yellow No. 13.But, do not get rid of the dyestuff that blend color is mutually different, to make the mode of black bottom surface complementary color, blend color and using.Further, preferably, mixing has the dyestuff of mutual different structure feature, to make the interaction between active multiple functional group and laten fingerprints composition.As an example, the dark blue dyes of three-component system dyestuff is by utilizing the method as preparation example 49, and No. 5th, the blueness that also can mix the large triarylmethane dyes of hydrophobicity in No. second, the blueness of blueness No. second aluminum color lake and azo dyes is formed.
Further, relative to the above-mentioned food colour of 100 weight portions, compositions of the present invention also can comprise the color make-up bonding agent of 3 ~ 15 weight portions.Bonding agent used for cosmetic, not only harmless but also greatly reduce the dustability of food colour, thus be easily suitable for bristle method, and substantially increase laten fingerprints manifest effect.As long as above-mentioned bonding agent used for cosmetic is used in cosmetics to increase the object of the adhesion between particle, just can use arbitrarily.In following examples, extremely exemplified with the result using polydimethylsiloxane (polydimethysiloxane) as bonding agent used for cosmetic, but following content can be confirmed: potato starch, guar gum (guargum), dextrin, lanolin alcohol (lanolinalcohol), lanolin wax (Lanolinwax), Colophonium, locust bean gum (ocustbeangum), methylcellulose (methylcellulose), Cera Flava, wheaten starch, ceresine (ceresin), cellulose gum (cellulosegum), isooctadecanol isostearate (isostearylisostearate), isopropyl lanolate (isopropyllanolate), isopropyl myristate (iospropylmyristate) and isopropyl palmitate (isopropylpalmitate) also reduce the dustability of food colour greatly, thus fingerprint manifestation effect is increased.When the additional ratio of above-mentioned bonding agent is less than 3 weight portion, be difficult to reduce dustability, when additional ratio is greater than 15 weight portion, reduce fingerprint manifestation effect on the contrary.
Because the dustability in aluminum color lake itself is low, thus the additive effect of bonding agent is little, and relative to the aluminum color lake of 100 weight portions, fingerprint manifestation effect when comprising the bonding agent of 3 ~ 15 weight portions is similar with the situation not comprising bonding agent.Therefore, in order to be prepared in the compressing powder of following explanation, bonding agent is comprised also harmless.
Compositions of the present invention, except above-mentioned bonding agent, also can comprise the color make-up additive of excipient, antistaling agent and spice etc.Now, preferably, relative to the food colour of 100 weight portions, the above-mentioned each additive beyond the bonding agent comprising 3 ~ 5 weight portions, preferably, comprises the addition of total additive of bonding agent for being less than 20 weight portions.When the total amount of additive is greater than 20 weight portion, the ratio along with dyestuff reduces fingerprint manifestation effect and reduces.In the examples below, only describe antistaling agent beyond bonding agent and comprise the result of compositions of polymethacrylates (polymethacylate), above-mentioned polymethacrylates is for representing the silk-like feeling (silkyfeel) because of epithelium molding, but according to preliminary experiment, dustability reduce in bonding agent be added to most important, polymethacrylates has, when applicable bristle method, powder is made more mildly to apply effect, but, together effect is not manifested on the reduction of dustability or raising with antistaling agent and does not produce large impact.
Generally, in the laten fingerprints qualification on science is searched, due to manifesting of the fingerprint manifestation agent pair of powder morphology and the laten fingerprints of the porous material left over, manifest efficiency very low, thus inapplicable, and be restrictively only applicable to porous material.Therefore, when manifesting the laten fingerprints left on the porous material of such as stationery, traditionally by 1,2,3-indantrione monohydrate (Ninhydrin) solution, use as spraying (spraying) method or dipping (dipping) method.But, identified to there is the worry of the evidence damaged on paper by the ninhydrin method of liquid form.Can be confirmed by following examples, compositions of the present invention fingerprint manifestation effect in the porous paper of such as A4 blank sheet of paper or the black paper of A4 and so on is also outstanding, thus becomes for a change to use in the fingerprint manifestation of porous and so on the developing latent finger prints compositions reformed very much of the fixed ideas of liquid processes.And, compositions of the present invention is thinking the submerged that cannot realize in prior art the developing latent finger prints effect of carrying out in fingerprint in dry water or facial tissue is also very outstanding, thus known, do not receive the porous impact on the surface that whether there is the various material leaving over laten fingerprints greatly.
Developing latent finger prints compositions of the present invention, in order to carry and use simple, can use with the form molding of compressing powder.If above-mentioned compressing powder is prepared into the state of the box of the compact and so on be loaded on as color make-up, then there is the advantage carried more easily and use.In the molding of compressing powder, utilize squeezer and bonding agent together to carry out the concrete base material squeezed etc. even if omit, the those of ordinary skill of technical field of the present invention easily can use the technology of the molding of the compressing powder of the fingerprint manifestation agent being applicable to prior art or in makeup cosmetic, be used in the technology of dosage form of compact or eye shadow.
Further, the present invention relates in order to above-mentioned composition, is the developing latent finger prints method of feature by the existing laten fingerprints of bristle Faxian.In the prior art, raise difficult questions to manifest laten fingerprints by bristle or think almost impossible half porous transparent plastic or porous material (paper or facial tissue) detection bodies in manifest laten fingerprints, and in water-immersed water, manifest efficiency in fingerprint also very outstanding.
As mentioned above, if think by developing latent finger prints compositions of the present invention and developing latent finger prints method, cannot manifest by powder method in the past, then not only leaving over the laten fingerprints in porosity surface material, and till the manifesting of the laten fingerprints in water-immersed water, evidence left over, under numerous conditions, the high-resolution laten fingerprints of card can be adopted rapidly and exactly.
And, developing latent finger prints compositions of the present invention and developing latent finger prints method, there is the dyestuff of multiple color, thus easily distinguish with the color left on the material surface of laten fingerprints, thus, even if do not use independent light source, also can with the naked eye identify, and irradiate visible rays condition under (ultraviolet; 425 ~ 635nm), manifesting property is more remarkable, thus can obtain clear and definite fingermark image image.
This developing latent finger prints compositions of the present invention and developing latent finger prints method, substantially make use of the dyestuff that can be used for eating, guarantee the stability to human body, thus provide safer qualification environment to love scene appraiser.
Accompanying drawing explanation
Fig. 1 and Fig. 2 is the image utilizing the developing latent finger prints effect of developing latent finger prints compositions that the one embodiment of the invention comprising food colour is shown.
Fig. 3 is the image utilizing the developing latent finger prints effect of developing latent finger prints compositions that the one embodiment of the invention comprising aluminum lake colours is shown.
Fig. 4 and Fig. 5 is the image utilizing the developing latent finger prints effect of developing latent finger prints compositions that the one embodiment of the invention comprising food colour is shown.
Fig. 6 is the image utilizing the developing latent finger prints effect of developing latent finger prints compositions that the one embodiment of the invention comprising aluminum lake colours is shown.
Fig. 7 and Fig. 8 is the image utilizing the developing latent finger prints effect of developing latent finger prints compositions that the one embodiment of the invention comprising food colour is shown.
Fig. 9 is the image utilizing the developing latent finger prints effect of developing latent finger prints compositions that the one embodiment of the invention comprising two-component system dyestuff is shown.
Figure 10 is the image utilizing the developing latent finger prints effect of developing latent finger prints compositions that the one embodiment of the invention comprising three-component system dyestuff is shown.
Figure 11 illustrates the outstanding image manifesting example of the representativeness of the laten fingerprints comprising two-component system and three-component system visualization reagent compositions.
Detailed description of the invention
Below, with reference to accompanying drawing, embodiments of the invention are described in detail.But this embodiment is only for content and the scope of easier explanation technological thought of the present invention, technical scope of the present invention is not limited to this or changes.Further, be illustrated as basis with this, can carry out various deformation and change within the scope of technological thought of the present invention, this is apparent concerning general technical staff of the technical field of the invention.
Embodiment: developing latent finger prints effect compares
When proposing separately in the examples below, what have rated laten fingerprints according to following methods manifests effect.
In order to obtain uniform laten fingerprints detection bodies, at ambient temperature, carry out drying with the right hand thumb of the same experimenter of washing with acetone, after stroking the forehead in the health of oneself, nose, hair successively, at LOAD CELLS (CASNT203A, Korea S (Korea)) upper place the material being used for pressing fingerprint, and apply the power of 1.2kgf/10N equably, on the fingerprint left over the region of straight corner form for object has prepared fingerprint sample.In order to improve the on-the-spot suitability, place after 3 hours, for carrying out powder coating experiment.In laten fingerprints sample, use crime scene investigation brush (CSIBrush (IDTECH) company), utilize bristle method to apply and manifest with powder, and automatically adjust Samsung digital camera (NX300 model; Bundle lens 20-50mm) automatically regulate AWB (AWB, AutoWhiteBalance) to make periphery contrast effect become after maximum mode takes, the Automated Fingerprint Identification System (AFIS, AutomatedFingerprintIdentificationSystems) used in police agency is utilized to compare feature scores amount.Manifesting efficiency to compare, using the black powder utilized in developing latent finger prints in the past to manifest laten fingerprints and to compare its effect.Each experiment has carried out more than twice to confirm its repeatability respectively repeatedly.
Embodiment 1: the developing latent finger prints efficacy assessments utilizing food colour
1) the developing latent finger prints efficacy assessments in the porous and imporosity detection bodies of food colour
The food colour (table 1) of 15 kinds is used to have rated the developing latent finger prints effect in porous and imporosity detection bodies.15 kinds of food colours are bought from Sigma-Aldrich (Aldrich-Sigma) company and EmeraldPerformanceMaterialsLLC, before the use, put into attritive powder Dry-crusher (grinder) and pulverize, make even particle size distribution, with the level that the size of the powder particle making the approximate size of particle and solid, shaped cosmetic use is similar, thus make maintenance to the size of more than the 20nm that skin does not have an impact.As comparative example, the black powder used in previous methods is bought and is used from (strain) three and company.Before the use at 50 DEG C of temperature, activation is come to the dehumidification that above-mentioned developing latent finger prints powder carries out 2 ~ 3 hours.
Because the dustability of food colour is very strong, is thus difficult to process when manifesting and utilizing bristle method fingerprint manifestation, and then has been suitable for rolling.Rolling (Rolling) method is spreading excess powder in detection bodies, and the material of fingerprint is left in mildly shake to the left and right, does not sustain damage and after absorbing equably, remove the method for excessive powder to make fingerprint.Black powder manifests laten fingerprints by bristle method (brushing).
The A4 paper of porous material and the glass slide (glass) of imporosity material is employed as the detection bodies leaving over laten fingerprints.Now, to make the impact that can confirm that background color produces, A4 paper is counted from the feature of the laten fingerprints manifested for detection bodies object with white paper using (A4 blank sheet of paper) and black paper using (the black paper of A4), have rated respectively and manifests effect.
Table 3 is for representing the number of the characteristic point using food colour or black powder to measure in each detection bodies, and Fig. 1 ~ Fig. 2 is for being respectively developing latent finger prints image.
Table 3
In table 3, the black powder of the prior art of comparative example, in the glass of imporosity, manifesting property is good, but, due to the number of characteristic point that manifests in porous paper less or do not have, in porous detection bodies, thus expose the problem being difficult to carry out the prior art identified.When food colour, be difficult to, in the porous stationery carrying out identifying, occur surmounting good the manifesting property being applicable to imporosity degree, thus can confirm with black powder, that together supplements with black powder is effectively used in manifesting of laten fingerprints.
2) the developing latent finger prints efficacy assessments in aluminum color lake is used
Although food colour in porous detection bodies to manifest power outstanding, because dustability is difficult to by force operation, thus exist and be difficult to the problem being applicable to bristle method.To this compared with food colour, as the aluminum color lake of the aluminium complex of food colour than great, be thus judged as that dustability is low, and have rated the developing latent finger prints effect using these.Have purchased 7 kinds of (table 2) aluminum lake colours of use from Sigma-Aldrich (Aldrich-Sigma) company and EmeraldPerformanceMaterialsLLC.
Identical with food colour, aluminum color lake also through fine powder dry type pulverize and dehumidification pretreatment process after, according to 1) in described method be used in manifesting of laten fingerprints.Its result, as expect, the dustability in aluminum color lake is very low, thus no problem be applicable to bristle method.
Table 4 is for representing, the number of the characteristic point using food colour or black powder to measure in each detection bodies, Fig. 3 is each developing latent finger prints image.Below, in all tables and figure, to count and image side represents with asterisk (*) is the detection bodies of black background color in feature.
Table 4
Can confirm from table 4 and Fig. 3, in imporosity glass detection bodies, comprise the compositions of the preparation example 16 ~ 22 in aluminum color lake manifest Be very effective lower than with black powder manifest effect, and in porous A4 paper, also there is being only second to glass manifest efficiency.Can confirm thus, by bristle method, what the compositions comprising aluminum color lake can be useful is applicable to manifesting of the laten fingerprints being difficult to carry out the detection bodies identified in prior art.
3) the developing latent finger prints efficacy assessments of food colour compositions
As another program of the dustability for reducing food colour, interpolation is used in the bonding agent of makeup cosmetic to prepare developing latent finger prints compositions, and have rated physical characteristic and manifest effect.
First, the developing latent finger prints agent comprising food colour has been prepared according to the composition of lower list 5.The composition of the table 5 outside food colour is bought from Stepan Co. (StepanCompany) and uses.After dry type pulverizing is carried out to the mixture of the composition with table 5, at 50 DEG C of temperature, carry out the dehumidification of 2 ~ 3 hours and activation.The dustability of above-mentioned composition is significantly less than the dustability of food colour, thus is easily suitable for bristle method, and according to 1) in the method recorded manifested laten fingerprints.
Table 5
Table 6 is for utilizing the compositions of table 5 to represent the number of the characteristic point measured in each detection bodies, and Fig. 4 ~ Fig. 5 is respectively developing latent finger prints image.Dyestuff namelist in table 6 is shown in the kind of the food colour used in above-mentioned composition.From the above results, the compositions of table 5 also represents the significant presentation capability of the degree similar with aluminum color lake, thus in the paper of porous material also to the qualification of laten fingerprints without a doubt.
Table 6
Embodiment 2: in the past cannot to carry out the qualification efficacy assessments in the detection bodies identified
In embodiment 1, visualization reagent according to the present invention in porous material also exhibits excellent manifest effect, have rated and manifest effect in the detection bodies that almost cannot manifest with powder agent in the past.That is, fingerprint and the laten fingerprints left in facial tissue (Mona Lisa's (strain) beauty and make-up paper) in the water be immersed in water not being applicable to porous detection bodies is attempted to manifest.In order to fingerprint detection in water, the laten fingerprints left in A4 white paper using to be soaked in water 3 hours, and to take out from water, after 24 hours, employ the detection bodies of bone dry.Meanwhile, that has also carried out laten fingerprints to the transparent plastic of the half porous polrvinyl chloride (PVC, Polyvinylchloride) being difficult to identify by prior art manifests efficacy assessments.
Use and comprise the preparation example 16 ~ preparation example 22 in aluminum color lake and the preparation example 23 ~ preparation example 37 of food colour compositions, utilize bristle method to make laten fingerprints from each detection bodies, and illustrate the number of characteristic point in table 7, show fingerprint image at Fig. 6 ~ Fig. 8.
Table 7
First, as estimated, the black powder of prior art, being immersed in the water in water in fingerprint or facial tissue detection bodies, can't detect characteristic point, only observes 6 characteristic points in transparent plastic.In contrast to this, comprise the compositions of the preparation example 16 ~ preparation example 22 in aluminum color lake, manifest the existing powder agent of a part of fingerprint geometric ratio in fingerprint and represent good manifesting property being immersed in the water in water.In facial tissue, comprise in the compositions in the aluminum color lake of red No. 40 and manifest a part of fingerprint, but in remaining set compound, manifest all bad with comparative example identical fingerprints.In the transparent plastic of half porous material, the manifesting property of most preparation example compositions is higher than the manifesting property of black powder.
Table 8
The compositions of the preparation example 23 ~ preparation example 37 be made up of food colour and additive, all shows in actual qualification the high of level can be utilized to manifest power being immersed in fingerprint and facial tissue and transparent plastic in the water in water.
Embodiment 3: the developing latent finger prints efficacy assessments utilizing aluminum color lake and food colour blend compositions
The dustability of the compositions of the preparation example 16 ~ preparation example 22 be made up of aluminum color lake is low, but, in water fingerprint or manifest in facial tissue power low reason be that chroma is low compared with food colour itself, thus reduce with the contrast effect of surrounding, because the dustability of food colour itself is large, thus be difficult to operate, but because chroma is high, thus be conducive to contrasting with surrounding, thus when aluminum mixture color lake and food colour, supplement each shortcoming, and then can expect improve laten fingerprints manifest effect.
To this, mix the compositions being selected from preparation example 1 ~ preparation example 15 with the ratio recorded in lower list 9 and prepare with the compositions being selected from preparation example 16 ~ preparation example 22 compositions comprising two-component system or three-component system dyestuff.Because the dustability of the compositions of preparation is little, no problem during applicable bristle method.
Afterwards, the compositions that mixing is selected from the preparation example 23 ~ preparation example 37 including bonding agent prepares with the compositions being selected from preparation example 16 ~ preparation example 22 compositions comprising two-component system or three-component system dyestuff, have rated the developing latent finger prints effect in fingerprint in the water be immersed in water, facial tissue and plastics detection bodies in the same manner as in Example 1.Meanwhile, together showed leave over laten fingerprints after developing latent finger prints result in the glass slide detection bodies of 24 hours.
Table 9 and Fig. 9 are the developing latent finger prints result of the compositions comprising two-component system dyestuff.The compositions of preparation example 38 ~ preparation example 44 contains food colour, but, because dustability is very low, thus easily carry out the developing latent finger prints of bristle method.
Table 9
Can confirm from table 9 and Fig. 9, compositions of the present invention is not only being immersed in fingerprint in the water in water, and also there is outstanding fingerprint manifestation effect in facial tissue, and after leaving over plastics and fingerprint, through the glass surface of 24 hours, also show not only outstanding than existing powder agent, and than one-component system dyestuff more outstanding manifest effect.Especially, the compositions of preparation example 41, preparation example 42, preparation example 44 in the detection bodies of all kinds laten fingerprints to manifest effect outstanding.
Below, table 10 and Figure 10 are as the result of compositions of dyestuff comprising three-component system, identical with the compositions of the preparation example 23 ~ preparation example 29 comprising two-component system dyestuff, show very outstanding to manifest result.In lower list 7 and Figure 10, what represent with plus sige (+) is represent to use the independent light source (PolilightFLARE of Australian Luo Fen (ROFIN) company
+; 450nm) take.
Table 10
Figure 11 represents manifesting example according to the representativeness of laten fingerprints is outstanding in the multiple condition of two-component system and three-component system visualization reagent compositions.Especially, to leaving over the low result manifested being suitable for the steaming method utilizing olefin(e) acid salt binding agent to smoke in the laten fingerprints of polrvinyl chloride, represent high developing latent finger prints reinforced effects than the situation of the crystal violet used in the past.This effect provides the high black of chroma, blueness and green colouring material and also has good the manifesting property identical with blend compositions.
Claims (10)
1. a developing latent finger prints compositions, is characterized in that, comprises more than one in the food colour described in being selected from table 1,
Table 1
2. developing latent finger prints compositions according to claim 1, is characterized in that, above-mentioned food colour is aluminum color lake form, and above-mentioned food colour is the one in compound described in table 2,
Table 2
3. developing latent finger prints compositions according to claim 1, it is characterized in that, relative to more than one the food colour be selected from food colour described in table 1 of 100 weight portions, also comprise more than one the aluminum color lake be selected from aluminum color lake described in table 2 of 50 ~ 200 weight portions.
4. developing latent finger prints compositions according to claim 3, is characterized in that, above-mentioned food colour is the color with aluminum lake colours same train.
5. developing latent finger prints compositions according to any one of claim 1 to 4, is characterized in that, relative to the above-mentioned food colour of 100 weight portions, also comprises the bonding agent used for cosmetic of 3 ~ 15 weight portions.
6. developing latent finger prints compositions according to claim 5, it is characterized in that, above-mentioned bonding agent used for cosmetic be selected from the group that is made up of polydimethylsiloxane, potato starch, guar gum, dextrin, lanolin alcohol, lanolin wax, Colophonium, locust bean gum, methylcellulose, Cera Flava, wheaten starch, ceresine, cellulose gum, isooctadecanol isostearate, isopropyl lanolate, isopropyl myristate and isopropyl palmitate more than one.
7. a developing latent finger prints compressing powder, is characterized in that, the form being compressing powder by the developing latent finger prints composition molding according to any one of Claims 1-4 forms.
8. a developing latent finger prints compressing powder, is characterized in that, the form being compressing powder by the developing latent finger prints composition molding of claim 5 forms.
9. a developing latent finger prints method, is characterized in that, uses the developing latent finger prints compositions according to any one of claim 1 to 4, comes by the existing laten fingerprints of bristle Faxian.
10. a developing latent finger prints method, is characterized in that, uses the fingerprint manifestation compositions of claim 5, comes by the existing laten fingerprints of bristle Faxian.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2014-0091199 | 2014-07-18 | ||
| KR20140091199A KR101495875B1 (en) | 2014-07-18 | 2014-07-18 | Composition for New Latent Fingerprint Detector Comprising Food Dyes |
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| CN105266819A true CN105266819A (en) | 2016-01-27 |
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| CN108315011A (en) * | 2016-11-15 | 2018-07-24 | 香港科技大学 | Fingerprint imaging composition and its application |
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| KR102604837B1 (en) | 2021-05-26 | 2023-11-22 | 대한민국 | Method and apparatus for determining the level of fingerprint development |
| KR102433909B1 (en) | 2021-10-28 | 2022-08-23 | 대한민국 | Composition for enhancing fluorescent of blood fingerprint and method using the same |
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|---|---|---|---|---|
| US4719119A (en) * | 1983-08-31 | 1988-01-12 | Loctite Corporation | Cyanoacrylate fingerprint development method |
| JP2006152223A (en) * | 2004-11-05 | 2006-06-15 | Daiwa Kasei Kk | Aluminum lake pigment |
| US20080142760A1 (en) * | 2006-10-20 | 2008-06-19 | Kyung-Taek SHIN | Portable press powder for latent fingerprints and method for preparing the same |
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2014
- 2014-07-18 KR KR20140091199A patent/KR101495875B1/en active IP Right Grant
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2015
- 2015-07-14 CN CN201510411813.4A patent/CN105266819A/en active Pending
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| US4719119A (en) * | 1983-08-31 | 1988-01-12 | Loctite Corporation | Cyanoacrylate fingerprint development method |
| JP2006152223A (en) * | 2004-11-05 | 2006-06-15 | Daiwa Kasei Kk | Aluminum lake pigment |
| US20080142760A1 (en) * | 2006-10-20 | 2008-06-19 | Kyung-Taek SHIN | Portable press powder for latent fingerprints and method for preparing the same |
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| HARISH KUMARI等: "New visualizing agents for latent fingerprints: Synthetic food and festival colors", 《EGYPTIAN JOURNAL OF FORENSIC SCIENCES》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108315011A (en) * | 2016-11-15 | 2018-07-24 | 香港科技大学 | Fingerprint imaging composition and its application |
| CN108315011B (en) * | 2016-11-15 | 2021-04-09 | 香港科技大学 | Composition for developing fingerprint and application thereof |
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