CN106667497A - Method for simultaneously transferring and demonstrating latent fingerprints by utilizing hydrophilic membrane and water solution - Google Patents
Method for simultaneously transferring and demonstrating latent fingerprints by utilizing hydrophilic membrane and water solution Download PDFInfo
- Publication number
- CN106667497A CN106667497A CN201611008624.3A CN201611008624A CN106667497A CN 106667497 A CN106667497 A CN 106667497A CN 201611008624 A CN201611008624 A CN 201611008624A CN 106667497 A CN106667497 A CN 106667497A
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- Prior art keywords
- hydrophilic film
- fingerprint
- aqueous solution
- latent fingerprint
- latent
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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
- A61B5/117—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
Abstract
The invention belongs to the technical field of fingerprint identification and particularly relates to a method for simultaneously transferring and demonstrating latent fingerprints by utilizing a hydrophilic membrane and a water solution. The method comprises the steps that the hydrophilic membrane having the capability of absorbing amino acids, protein and glyceride in fingerprint ingredients is used as a transfer material to transfer the latent fingerprints from the surface of an object; the water solution is used as a material for demonstrating latent fingerprints on the surface of the hydrophilic membrane, the hydrophilic membrane carrying the latent fingerprints or palmprints is soaked in the water solution, the soakage difference of ridge line zones and valley line zones of the latent fingerprints is utilized to make color backgrounds of the two zones have remarkable difference, and print outlines are demonstrated. The problem that demonstration on a difficult object is difficult or a demonstrating effect is poor by adopting a traditional method and the large adhesion of a print adhesive tape easily damages several weak surface latent fingerprints is solved.
Description
Technical field
The invention belongs to fingerprint judging technique field, and in particular to one kind utilizes hydrophilic film（Such as nitrocellulose filter, vinegar
Acid cellulose film etc.）And aqueous solution（Blank or any coloring matter）The method for shift and manifest latent fingerprint simultaneously.
Background technology
Fingerprint identification from starting in 19th century always to carry out one of most reliable method of person identification, typically in method
It is used for investigating, disclosing and confirm crime in the science of front yard.Fingerprint to being retained on object surface is extracted and identification is detection
The important evidence of case.Latent fingerprint, refers to Jing body naturally secret thing such as perspiration and oils and fatss, in the presence of muscular strength, contact visitor
So as to the fingerprint lines for being formed, macroscopic visual is difficult to find, is modal class fingerprint in spot, to detection in body surface face
Case plays an important role.And palm stricture of vagina area is wide, deformation is little, and characteristic point is more, contains much information, in the case of finger defect,
The information value of palm stricture of vagina is bigger.Science correctly finds, extracts, manifesting the latent fingerprint of identification and palm stricture of vagina for development investigation work
Make, improve safety detection there is important practice effect.
Fingerprint manifestation from initially single and simple method, develop become till now an integrated use physics,
The professional technique of the subject knowledges such as chemistry, biology.Appearing Techniques of Human Fingerprints is developed so far the different method of a variety of principles,
The such as smoked aobvious aminoacid such as method and 1,2,3-indantrione monohydrate of the most frequently used significant powder brush method in scene of a crime, iodine fumigation, silver nitrate method, 502 glue shows
Show agent method.But these traditional methods have the disadvantages that：（1）There is harm to the healthy of operator；（2）To latent finger
Stricture of vagina causes to damage；（3）On some difficult object surfaces（Bank note, skin etc.）On latent fingerprint do not have and presentation capability or manifest effect
It is really poor.With the continuous development of analytical technology, increasing Modern Scientific Instruments and technological means are applied to fingerprint detection
In field, such as using the latent fingerprint of electrochemical method detection（Electrodeposition process, scan-type electrochemical microscope method etc.）, spectrographic method, mass spectrum
Method, using for example immune labeled method of biotechnology.But these Appearing Techniques of Human Fingerprints are generally required using special instrument, fingerprint shows
Existing process is loaded down with trivial details, manifests that effect is repeatable poor, and fingerprint can be destroyed in most cases, not be suitable for diving for scene of a crime
Fingerprint manifestation.
It is adhesive tape extraction method to the extraction most common method of fingerprint in the reconnaissance at criminal scene of all kinds of cases, but the method
As the huge adhesion of tape surface is lost sternly to the latent fingerprint destructible in some fragile surfaces, and latent detail characteristics of fingerprints
Weight, loses inspection and compares value.In detecting when participating in the cintest, fingerprint needs to preserve good as important evidence, but some present
New chemical process for show may be damaged to fingerprint and be unfavorable for follow-up investigation.So needing to invent reliable method
Can shift latent fingerprint completely lossless and preserve imaging simultaneously.
The content of the invention
For the problems referred to above, the present invention provides a kind of simple, quick, accurate, environmentally friendly, cheap, lossless, universality and resolution
The method that the good utilization hydrophilic film of rate and aqueous solution are shifted and manifest latent fingerprint and palmmprint simultaneously, solution traditional method are being doubted
Cannot manifest or manifest the huge adhesion of effect difference and fingerprint adhesive tape on difficult object easy to the latent fingerprint in some fragile surfaces
The problem of destruction.
The present invention is achieved by the following technical solutions：
A kind of utilization hydrophilic film and aqueous solution are shifted and manifest the method methods described of latent fingerprint with fingerprint composition simultaneously
Aminoacid, protein, the glyceride hydrophilic film that has absorbability be material for transfer, from the latent fingerprint of object surface transfer；
And the hydrophilic film for manifesting material, dive fingerprint or palm stricture of vagina being carried of fingerprint of being dived as hydrophilic film surface with aqueous solution
In immersion aqueous solution, two field color backgrounds are produced using the difference of the soakage in the crestal line area and valley line area of latent fingerprint
Significant difference, shows lines profile.
Further, the method comprising the steps of：
（1）The hydrophilic of absorbability is had according to the cutting of object size to the aminoacid in fingerprint composition, protein, glyceride
Film；
（2）The hydrophilic film after by cutting is attached to object surface to be transferred, is pressed into the hydrophilic film and fully connects completely
Contact object surface, isolated latent fingerprint-hydrophilic film；
（3）Latent fingerprint-the hydrophilic film is put and be dipped in aqueous latent fingerprint and clearly show on hydrophilic film
Come, will the taking-up of the latent fingerprint-hydrophilic film, with filter paper suck unnecessary water droplet on the latent fingerprint-hydrophilic film obtain final product it is aobvious
Fingerprint-hydrophilic film.
Further, the hydrophilic film is 0.22 μm of nitrocellulose filter or cellulose acetate membrane.
Further, the hydrophilic film is the membrane material that contact angle of the water droplet in 0.5 s of its surface spreading is 10 ° -80 °
Material.
Further, the aqueous solution is the aqueous solution of methylene blue of 0.25 mg/ml.
Further, the aqueous solution is pure water solution or the aqueous solution containing coloring matter.
Further, the secretions vestige that on object surface carry over of the latent fingerprint for skin；
The latent fingerprint includes the latent fingerprint of invisible fingerprints of sweat, oil, dive naturally fingerprint, palm stricture of vagina or sole stricture of vagina.
Further, the object includes common object with itself with textured difficult object；
The common object includes non-permeable material, semipermeable materials and permeable material；
Non-permeable material such as glass, semipermeable materials such as ceramics, permeable material such as paper；
It is described itself to include leather and skin with textured difficult object.
The Advantageous Effects of the present invention：The present invention is simple and quick, and raw material is cheap and easy to get, process environment-friendly high-efficiency, effect
Fruit high resolution, it is adaptable to the latent fingerprint that the difficult object surface transfer that can not manifest from various common objects and traditional method comes
Manifest, overcome shortcoming of the huge adhesion of fingerprint adhesive tape to the latent fingerprint destructible in some fragile surfaces, and subsequently
Manifest operation and only can just be completed in the several seconds with aqueous solution, and be applicable to the Site Detection and evidence of latent fingerprint and protect
Stay.Therefore, the method has fabulous actual application value in fingerprint identification field.
Description of the drawings
Fig. 1, using the inventive method from ceramic object surface shift come developing latent finger printss design sketch；
Fig. 2, using the inventive method from leather object surface shift come developing latent finger printss design sketch；
Fig. 3, using the inventive method from poster paper object surface shift come developing latent finger printss design sketch；
Fig. 4, using the inventive method from palm object surface shift come developing latent finger printss design sketch；
Fig. 5, using the inventive method from glass object surface shift come palm stricture of vagina manifest design sketch；
Fig. 6 a- Fig. 6 e, latent fingerprint in glass surface and by NC film transfers after different phase manifest effect diagram.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is below in conjunction with drawings and Examples, right
The present invention is explained in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and
It is not used in the restriction present invention.
Conversely, the present invention covers any replacement done in the spirit and scope of the present invention being defined by the claims, repaiies
Change, equivalent method and scheme.Further, in order that the public has a better understanding to the present invention, below to the thin of the present invention
It is in section description, detailed to describe some specific detail sections.Part without these details for a person skilled in the art
Description can also understand the present invention completely.
Embodiment 1
A kind of method that utilization hydrophilic film and aqueous solution are shifted and manifest latent fingerprint simultaneously.Methods described is with fingerprint composition
Aminoacid, protein, the glyceride hydrophilic film that has absorbability be material for transfer, from the latent fingerprint of object surface transfer；And
The hydrophilic film soaking water for manifesting material, latent fingerprint or palm stricture of vagina being carried with aqueous solution as the latent fingerprint in hydrophilic film surface
In solution, two field color backgrounds are produced using the difference of the soakage in the crestal line area and valley line area of latent fingerprint significant
Difference, shows lines profile.
The crestal line area that latent fingerprint residues thing is covered causes more by force to be soaked ability by aqueous solution due to hydrophobicity, and corresponding
Valley line region is easier to be wetted, so as in 1-5 second cause two field color backgrounds to produce significant difference, rapidly and efficiently
Show fingerprint profile.
With 0.22 μm of nitrocellulose filter（NC films）, as a example by aqueous solution of methylene blue and the latent fingerprint of oil.Will be oil latent fingerprint light
The surfaces such as ceramics, leather, poster paper and palm are pressed against respectively lightly.
Further, the method comprising the steps of：
（1）0.22 μm of aperture NC film shears are cut into into 2 × 2 cm sizes and 15 × 20 cm sizes, are placed on and are wiped with ethanol
It is standby in the plastic culture dish of wash clean；
（2）Methylene blue solution is prepared, concentration is：0.25 mg/ml；
（3）The object surface that stamp crosses fingerprint is placed directly against using NC films, is pressed with appropriate dynamics, NC films is fully connect completely
Contact object surface, isolated oily latent fingerprint-NC films；
（4）By step（3）Latent fingerprint-NC the films of oil for obtaining soak 1-5 s in methylene blue solution, until latent fingerprint is in NC films
On clearly display, be drawn off, suck water droplet unnecessary on the latent fingerprint-NC films of oil with filter paper；
（5）Step（4）In the sample that manifested be positioned in horizontal table top and post, fixed extraction of taking pictures fingerprint image obtain Fig. 1-
Fig. 4.
Further,
By palm gently by the surface of glass
Repeat one step of embodiment in the glass surface with palm stricture of vagina（3）- step（5）Obtain Fig. 5.
Further,
Oil latent fingerprint is lightly pressed against into glass surface respectively, take pictures to obtain Fig. 6 a.
On the one hand：
Latent fingerprint image is carried out on the glass with the latent fingerprint of oil to manifest with brush argentum powder method, such as Fig. 6 b.
On the other hand：
（7）Repeat one step of embodiment on the glass surface of the latent fingerprint of oil（3）- step（5）Obtain Fig. 6 c.
（8）In the glass surface repeat step of transferred mistake（3）- step（5）Obtain Fig. 6 d.
（9）In Jing steps（5）The glass surface for having shifted afterwards twice carries out latent fingerprint image with brush argentum powder method to be manifested
Fig. 6 e.
It can be seen that including glass, ceramics, skin in different objects using the method for the invention from Fig. 1-Fig. 4 and Fig. 6 c
The latent fingerprint of leather, poster paper and palm is obtained for.
Fig. 5 shows that the inventive method equally serves good result shifting and manifest palm stricture of vagina.
Fig. 6 a- Fig. 6 e show that the inventive method transfer efficiency is high, basic noresidue.
Claims (8)
1. a kind of method that utilization hydrophilic film and aqueous solution are shifted and manifest latent fingerprint simultaneously, it is characterised in that methods described
Aminoacid, protein with fingerprint composition, glyceride have the hydrophilic film of absorbability as material for transfer, from object surface
The latent fingerprint of transfer；
And the hydrophilic film for manifesting material, dive fingerprint or palm stricture of vagina being carried of fingerprint of being dived as hydrophilic film surface with aqueous solution
In immersion aqueous solution, two field color backgrounds are produced using the difference of the soakage in the crestal line area and valley line area of latent fingerprint
Significant difference, shows lines profile.
2. the method for utilizing hydrophilic film and aqueous solution to shift and manifest latent fingerprint simultaneously as claimed in claim 1, its feature exist
In,
The method comprising the steps of：
（1）The hydrophilic of absorbability is had according to the cutting of object size to the aminoacid in fingerprint composition, protein, glyceride
Film；
（2）The hydrophilic film after by cutting is attached to object surface to be transferred, is pressed into the hydrophilic film and fully connects completely
Contact object surface, isolated latent fingerprint-hydrophilic film；
（3）Latent fingerprint-the hydrophilic film is put and be dipped in aqueous latent fingerprint and clearly show on hydrophilic film
Come, will the taking-up of the latent fingerprint-hydrophilic film, with filter paper suck unnecessary water droplet on the latent fingerprint-hydrophilic film obtain final product it is aobvious
Fingerprint-hydrophilic film.
3. the method for utilizing hydrophilic film and aqueous solution to shift and manifest latent fingerprint simultaneously as claimed in claim 1, its feature exist
In the hydrophilic film is 0.22 μm of nitrocellulose filter.
4. the method for utilizing hydrophilic film and aqueous solution to shift and manifest latent fingerprint simultaneously as claimed in claim 1, its feature exist
In the aqueous solution is the aqueous solution of methylene blue of 0.25 mg/ml.
5. the method for as described in claim 1-4 is arbitrary being shifted and manifesting latent fingerprint using hydrophilic film and aqueous solution simultaneously, its
It is characterised by, the hydrophilic film is the membrane material that contact angle of the water droplet in 0.5 s of its surface spreading is 10 ° -80 °.
6. the method for as described in claim 1-4 is arbitrary being shifted and manifesting latent fingerprint using hydrophilic film and aqueous solution simultaneously, its
It is characterised by, the aqueous solution is pure water solution or the aqueous solution containing coloring matter.
7. the method for as described in claim 1-4 is arbitrary being shifted and manifesting latent fingerprint using hydrophilic film and aqueous solution simultaneously, its
It is characterised by, the latent fingerprint is the vestige that the secretions of skin are carried on object surface；
The latent fingerprint includes the latent fingerprint of invisible fingerprints of sweat, oil, dive naturally fingerprint, palm stricture of vagina or sole stricture of vagina.
8. the method for as described in claim 1-4 is arbitrary being shifted and manifesting latent fingerprint using hydrophilic film and aqueous solution simultaneously, its
It is characterised by, the object includes common object with itself with textured difficult object；
The common object includes non-permeable material, semipermeable materials and permeable material；
It is described itself to include leather and skin with textured difficult object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611008624.3A CN106667497A (en) | 2016-11-16 | 2016-11-16 | Method for simultaneously transferring and demonstrating latent fingerprints by utilizing hydrophilic membrane and water solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611008624.3A CN106667497A (en) | 2016-11-16 | 2016-11-16 | Method for simultaneously transferring and demonstrating latent fingerprints by utilizing hydrophilic membrane and water solution |
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| CN106667497A true CN106667497A (en) | 2017-05-17 |
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| CN201611008624.3A Pending CN106667497A (en) | 2016-11-16 | 2016-11-16 | Method for simultaneously transferring and demonstrating latent fingerprints by utilizing hydrophilic membrane and water solution |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567355A (en) * | 2021-07-01 | 2021-10-29 | 湖北高碳光电科技有限公司 | Fingerprint film adhesive tape for latent fingerprints and preparation and application methods thereof |
| CN114305401A (en) * | 2021-12-17 | 2022-04-12 | 公安部物证鉴定中心 | Three-level characteristic judgment method for displaying various types of fingerprints |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104939839A (en) * | 2015-05-18 | 2015-09-30 | 北京科技大学 | Method for representing latent fingerprints through nitrocellulose membrane and water |
| CN105411599A (en) * | 2016-01-13 | 2016-03-23 | 北京科技大学 | Method for showing latent fingerprints through cellulose membrane and aqueous dye solution |
-
2016
- 2016-11-16 CN CN201611008624.3A patent/CN106667497A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104939839A (en) * | 2015-05-18 | 2015-09-30 | 北京科技大学 | Method for representing latent fingerprints through nitrocellulose membrane and water |
| CN105411599A (en) * | 2016-01-13 | 2016-03-23 | 北京科技大学 | Method for showing latent fingerprints through cellulose membrane and aqueous dye solution |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567355A (en) * | 2021-07-01 | 2021-10-29 | 湖北高碳光电科技有限公司 | Fingerprint film adhesive tape for latent fingerprints and preparation and application methods thereof |
| CN114305401A (en) * | 2021-12-17 | 2022-04-12 | 公安部物证鉴定中心 | Three-level characteristic judgment method for displaying various types of fingerprints |
| CN114305401B (en) * | 2021-12-17 | 2024-03-15 | 公安部物证鉴定中心 | Three-level characteristic judgment method for displaying fingerprints of various types |
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Application publication date: 20170517 |
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