CN104605860A - Fingerprint showing method for permeable object with crude surface - Google Patents
Fingerprint showing method for permeable object with crude surface Download PDFInfo
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/117—Identification of persons
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Abstract
The invention relates to a fingerprint showing method for a permeable object with a crude surface. The method comprises the following steps: soaking or spraying the permeable object with the crude surface with a fluorescent appearing agent, controlling the reacting time to 5 sec-15 sec, and then, drying the permeable object with the crude surface for 5-30 min in the environment that the relative humidity is smaller than 40% and the temperature is 50-120 DEG C, illuminating the dried permeable object with the crude surface with lasers of which the wave lengths are 532 nanometers and the half height width of spectrums is smaller than 1 nanometer, and controlling the illumination to form illuminance exceeding 500 thousand lux on the surface of the permeable object with the crude surface. According to the fingerprint showing method disclosed by invention, the proportion of the formula of the fluorescent appearing agent is adjusted, and the reacting temperature, the drying condition, and the lasers for illumination are adjusted, so that the fingerprint showing method disclosed by the invention can show fingerprints on the surface of the permeable object with the crude surface.
Description
Technical field
the present invention relates to a kind of fingerprint displaying method in matsurface permeability object.
Background technology
field is reconnoitred at criminal material evidence, need the crime material evidence finding and obtain that suspect leaves over, these material evidences comprise fingerprint material evidence, palmmprint material evidence, can reflect the trace evidence of DNA speciality, building crime fact chain of evidence whereby, establishing legal argument basis for punishing crimes.
but, in professional Forensic Science field, impression of the hand on brick, waddy, fabric, leather etc. is difficult to be found, and brick, waddy etc. are common criminal material evidences in China, in addition, a lot of case is through transfer corpse, therefore, if can find impression of the hand on brick, waddy, medicated clothing, the detection for case is significant.
in prior art, although there has been the report adopting indenes diketone to carry out fingerprint displaying, the method in report all cannot obtain the impression of the hand on brick, waddy, fabric, leather.
Summary of the invention
technical problem to be solved by this invention is to provide a kind of fingerprint displaying method that can obtain matsurface permeability object surface impression of the hand.
for solving above technical problem, the present invention takes following technical scheme:
a kind of fingerprint displaying method in matsurface permeability object, with fluorescent appear agent matsurface permeability object soaked or spray, the control response time is 5sec ~ 15sec, then described matsurface permeability object is less than 40% at relative humidity, dry 5 ~ 30min under the environment of temperature 50 C ~ 120 DEG C, be 532 nanometers with wavelength, the laser that spectrum halfwidth degree is less than 1 nanometer irradiates dried described matsurface permeability object, and control in the illumination of described matsurface permeability object surface formation more than 500,000 luxs, impression of the hand in matsurface permeability object described under light cutoff filter mirror under 540 nanometers can manifest, wherein, by mass percentage, the formula of described fluorescent appear agent is: indenes diketone 0.01% ~ 0.2%, glacial acetic acid 0.9% ~ 1.1%, ethyl acetate 8% ~ 10%, petroleum ether 88.7% ~ 91.09%.
in present embodiment, impression of the hand refers to fingerprint and palmmprint.
in present embodiment, under 540 nanometers, light cutoff filter mirror refers to and only allows 540 nanometers and above light wave pass through, and other light waves are intransitable filter lens then.
particularly, described matsurface permeability object is brick, timber, fabric or leather.
if the permeability of object is comparatively strong, then can adopts the fluorescent appear agent that indenes diketone mass concentration is lower, if object permeability is more weak, then can adopt the fluorescent appear agent that indenes diketone mass concentration is higher.But, if indenes diketone excessive concentration, then easily make the impression of the hand figure of generation fuzzy, cannot use, adopt indenes diketone concentration low, easily produce impression of the hand figure clearly, but if concentration is too low, impression of the hand also may be made not see or cannot see.
more specifically, when described matsurface permeability object is brick, by mass percentage, the formula of described fluorescent appear agent is: indenes diketone 0.1% ~ 0.15%, glacial acetic acid 0.9% ~ 1.1%, ethyl acetate 8% ~ 10%, petroleum ether 89% ~ 90.95%; The temperature of carrying out described drying is 100 DEG C ~ 120 DEG C, and drying time is 5 min ~ 15min.
more specifically, when described matsurface permeability object is timber, by mass percentage, the formula of described fluorescent appear agent is: indenes diketone 0.15% ~ 0.2%, glacial acetic acid 0.9% ~ 1.1%, ethyl acetate 8% ~ 10%, petroleum ether 88.7% ~ 90.95%; The temperature of carrying out described drying is 80 ~ 100 DEG C, and drying time is 10 ~ 20min.
more specifically, when described matsurface permeability object is fabric, by mass percentage, the formula of described fluorescent appear agent is: indenes diketone 0.05% ~ 0.15%, glacial acetic acid 0.9% ~ 1.1%, ethyl acetate 8% ~ 10%, petroleum ether 88.75% ~ 91.05%; The temperature of carrying out described drying is 50 DEG C ~ 80 DEG C, and drying time is 10 ~ 30min.
more specifically, when described matsurface permeability object is leather, by mass percentage, the formula of described fluorescent appear agent is: indenes diketone 0.1% ~ 0.2%, glacial acetic acid 0.9% ~ 1.1%, ethyl acetate 8% ~ 10%, petroleum ether 88.7% ~ 91.0%; The temperature of carrying out described drying is 50 DEG C ~ 80 DEG C, and drying time is 10 ~ 30min.
particularly, before the fluorescent appear agent described in soaking or spray, the matsurface permeability object moisture content described in control is less than 8%.
more specifically, before the fluorescent appear agent described in soaking or spray, the matsurface permeability object moisture content described in control is 6 ~ 7%.
particularly, described matsurface permeability object is carry out described drying under the environment of 25% ~ 35% at relative humidity.
particularly, the illumination that the matsurface permeability object surface described in control is formed is 500,000 ~ 1,000,000 luxs.
more specifically, the collocation method of described fluorescent appear agent is: be 20 DEG C ~ 30 DEG C in temperature, relative humidity is in the environment of 50% ~ 70%, described glacial acetic acid and described ethyl acetate are pressed formula ratio mix homogeneously, then the described indenes diketone of formula ratio is added, stirring is dissolved, and finally adds the described petroleum ether of formula ratio, stirs and obtains described fluorescent appear agent.
in present embodiment, first use is now joined in described fluorescent appear agent, or in brown light-shading bottle 4 DEG C of cryopreservations, and should to be finished in 2 weeks.
due to the enforcement of above technical scheme, the present invention compared with prior art tool has the following advantages:
the present invention, by the adjustment of the laser of the adjustment to fluorescent appear agent prescription ratio, reaction temperature, drying condition, irradiation, makes the present invention can manifest the impression of the hand on matsurface permeability object surface.
Accompanying drawing explanation
accompanying drawing 1 is the fingerprint of embodiment 1;
accompanying drawing 2 is the fingerprint of embodiment 2;
accompanying drawing 3 is the fingerprint of embodiment 3;
accompanying drawing 4 is the fingerprint of comparative example 1;
accompanying drawing 5 is the fingerprint of comparative example 2.
Detailed description of the invention
below in conjunction with specific embodiment, the present invention will be further described in detail, but be not limited to these embodiments.
embodiment 1(sample is the brick with fingerprint)
(1) it is 7% that the method, by drying controls brick moisture content;
(2), 25 DEG C, under relative humidity is the environment of 60%, 1.0g glacial acetic acid and 9.0g ethyl acetate are fully mixed; Then add 0.12g indenes diketone, fully stir and dissolve, then add 89.88g petroleum ether, fully stir and dissolve, be mixed with fluorescent appear agent, fluorescent appear agent is now with the current, as needed storage, then puts into brown light-shading bottle 4 DEG C of cryopreservations, and should be finished in 2 weeks;
(3), by brick be immersed in fluorescent appear agent, soak 10sec;
(4), the brick after soaking is put into after airing under ambient room temperature (25 DEG C) relative humidity is 30%, dry 10min under the environment of temperature 120 DEG C;
(5) be, with wavelength 532 nanometers, the spectrum halfwidth degree laser that is less than 1 nanometer irradiates dried brick, and control the illumination that brick surface forms 1,000,000 luxs, the impression of the hand obtained by photographic means under light cutoff filter mirror under 540 nanometers is shown in Fig. 1.
embodiment 2(sample is the timber with fingerprint)
(1) it is 7% that the method, by drying controls moisture content;
(2), 25 DEG C, under relative humidity is the environment of 60%, 1.0g glacial acetic acid and 9.0g ethyl acetate are fully mixed; Then add 0.15g indenes diketone, fully stir and dissolve, then add 88.5g petroleum ether, fully stir and dissolve, be mixed with fluorescent appear agent, fluorescent appear agent is now with the current, as needed storage, then puts into brown light-shading bottle 4 DEG C of cryopreservations, and should be finished in 2 weeks;
(3), by the timber with fingerprint be immersed in fluorescent appear agent, soak 10sec;
(4), the timber after soaking is put into after airing under ambient room temperature (25 DEG C) relative humidity is 30%, dry 15min under the environment of temperature 100 DEG C;
(5) be, with wavelength 532 nanometers, the spectrum halfwidth degree laser that is less than 1 nanometer irradiates dried timber, and control the illumination that wood surface forms 500,000 luxs, the impression of the hand obtained by photographic means under 540 nanometer filter lenss is shown in Fig. 2.
embodiment 3(sample is the fabric with fingerprint)
(1) it is 7% that the method, by drying controls moisture content of fabric;
(2), 25 DEG C, under relative humidity is the environment of 60%, 1.0g glacial acetic acid and 9.0g ethyl acetate are fully mixed; Then add 0.1g indenes diketone, fully stir and dissolve, then add 89.9g petroleum ether, fully stir and dissolve, be mixed with fluorescent appear agent, fluorescent appear agent is now with the current, as needed storage, then puts into brown light-shading bottle 4 DEG C of cryopreservations, and should be finished in 2 weeks;
(3), by brick be immersed in fluorescent appear agent, soak 10sec;
(4), the brick after soaking is put into after airing under ambient room temperature (25 DEG C) relative humidity is 30%, dry 20min under the environment of temperature 80 DEG C;
(5) be, with wavelength 532 nanometers, the spectrum halfwidth degree laser that is less than 1 nanometer irradiates dried brick, and control the illumination that brick surface forms 1,000,000 luxs, the impression of the hand obtained by photographic means under light cutoff filter mirror under 540 nanometers is shown in Fig. 3.
comparative example 1(sample is the brick with fingerprint)
by 100mg indenes diketone, 1ml glacial acetic acid, 9ml ethyl acetate, 90ml petroleum ether mix homogeneously, obtained fluorescent appear agent, brick is immersed in 10sec in this fluorescent appear agent, then be placed in 85 DEG C, relative humidity be 65% dry 5 minutes of environment, penetrate with the illumination of 510nm or 530nm, the impression of the hand obtained by photographic means under orange filter is shown in Fig. 4.
comparative example 2(sample is the timber with fingerprint)
(1), 25 DEG C, under relative humidity is the environment of 60%, 1g glacial acetic acid and 10g ethyl acetate are fully mixed; Then add 0.1g indenes diketone, fully stir and dissolve, then add 88.9g petroleum ether, fully stir and dissolve, be mixed with fluorescent appear agent, fluorescent appear agent is now joined existing;
(2), by brick be immersed in fluorescent appear agent, soak 10sec;
(3), by the brick after soaking relative humidity be 70%, dry 10min under the environment of temperature 120 DEG C;
(4), use the alternative light source be made up of metal halogen light source, produce by the mode of light filter cut-off filter the monochromatic spectrum that peak wavelength is 530 nanometers, the impression of the hand obtained by photographic means is shown in Fig. 5.
above to invention has been detailed description; its object is to allow the personage being familiar with this art can understand content of the present invention and be implemented; can not limit the scope of the invention with this; the equivalence change that all spirit according to the present invention are done or modification, all should be encompassed in protection scope of the present invention.
Claims (10)
1. the fingerprint displaying method in a matsurface permeability object, it is characterized in that: with fluorescent appear agent matsurface permeability object soaked or spray, the control response time is 5sec ~ 15sec, then described matsurface permeability object is less than 40% at relative humidity, dry 5 min ~ 30min under the environment of temperature 50 C ~ 120 DEG C, be 532 nanometers with wavelength, the laser that spectrum halfwidth degree is less than 1 nanometer irradiates dried described matsurface permeability object, and the matsurface permeability object surface described in controlling forms the illumination more than 500,000 luxs, impression of the hand in matsurface permeability object described under light cutoff filter mirror under 540 nanometers can manifest, wherein, by mass percentage, the formula of described fluorescent appear agent is: indenes diketone 0.01% ~ 0.2%, glacial acetic acid 0.9% ~ 1.1%, ethyl acetate 8% ~ 10%, petroleum ether 88.7% ~ 91.09%.
2. the fingerprint displaying method in matsurface permeability object according to claim 1, is characterized in that: described matsurface permeability object is brick, timber, fabric or leather.
3. the fingerprint displaying method in matsurface permeability object according to claim 2, it is characterized in that: when described matsurface permeability object is brick, by mass percentage, the formula of described fluorescent appear agent is: indenes diketone 0.1% ~ 0.15%, glacial acetic acid 0.9% ~ 1.1%, ethyl acetate 8% ~ 10%, petroleum ether 89% ~ 90.95%; The temperature of carrying out described drying is 100 DEG C ~ 120 DEG C, and drying time is 10min ~ 15min.
4. the fingerprint displaying method in matsurface permeability object according to claim 2, it is characterized in that: when described matsurface permeability object is timber, by mass percentage, the formula of described fluorescent appear agent is: indenes diketone 0.15% ~ 0.2%, glacial acetic acid 0.9% ~ 1.1%, ethyl acetate 8% ~ 10%, petroleum ether 88.7% ~ 90.95%; The temperature of carrying out described drying is 80 DEG C ~ 100 DEG C, and drying time is 10 min ~ 20min.
5. the fingerprint displaying method in matsurface permeability object according to claim 2, it is characterized in that: when described matsurface permeability object is fabric, by mass percentage, the formula of described fluorescent appear agent is: indenes diketone 0.05% ~ 0.15%, glacial acetic acid 0.9% ~ 1.1%, ethyl acetate 8% ~ 10%, petroleum ether 88.75% ~ 91.05%; The temperature of carrying out described drying is 50 DEG C ~ 80 DEG C, and drying time is 10 min ~ 30min.
6. the fingerprint displaying method in matsurface permeability object according to claim 2, it is characterized in that: when described matsurface permeability object is leather, by mass percentage, the formula of described fluorescent appear agent is: indenes diketone 0.1% ~ 0.2%, glacial acetic acid 0.9% ~ 1.1%, ethyl acetate 8% ~ 10%, petroleum ether 88.7% ~ 91%; The temperature of carrying out described drying is 50 DEG C ~ 80 DEG C, and drying time is 10 min ~ 30min.
7. the fingerprint displaying method in matsurface permeability object according to any one of claim 1 to 6, is characterized in that: before the fluorescent appear agent described in soaking or spray, the matsurface permeability object moisture content described in control is less than 8%.
8. the fingerprint displaying method in matsurface permeability object according to claim 7, is characterized in that: before the fluorescent appear agent described in soaking or spray, the matsurface permeability object moisture content described in control is 6 ~ 7%.
9. the fingerprint displaying method in matsurface permeability object according to any one of claim 1 to 6, is characterized in that: described matsurface permeability object is carry out described drying under the environment of 25% ~ 35% at relative humidity.
10. the fingerprint displaying method in matsurface permeability object according to any one of claim 1 to 9, it is characterized in that: the collocation method of described fluorescent appear agent is: be 20 DEG C ~ 30 DEG C in temperature, relative humidity is in the environment of 50% ~ 70%, described glacial acetic acid and described ethyl acetate are pressed formula ratio mix homogeneously, then the described indenes diketone of formula ratio is added, stirring is dissolved, and finally adds the described petroleum ether of formula ratio, stirs and obtains described fluorescent appear agent.
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| CN106802292A (en) * | 2017-01-22 | 2017-06-06 | 苏州晓松科技开发有限公司 | A kind of method for manifesting permeability object biological evidence vestige |
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| CN109254149B (en) * | 2018-09-10 | 2022-02-25 | 公安部物证鉴定中心 | Method for showing occult blood trace and special reagent thereof |
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