KR20060011368A - Method of collecting latent fingerprints using iron oxide solution - Google Patents
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- KR20060011368A KR20060011368A KR1020040060181A KR20040060181A KR20060011368A KR 20060011368 A KR20060011368 A KR 20060011368A KR 1020040060181 A KR1020040060181 A KR 1020040060181A KR 20040060181 A KR20040060181 A KR 20040060181A KR 20060011368 A KR20060011368 A KR 20060011368A
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- 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
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- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/30—Oxides other than silica
- C04B14/308—Iron oxide
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Abstract
본 발명은 사람이 손으로 만진 물체 표면에서 육안으로 보이지 않는 잠재지문을 채취하는 방법에 관한 것으로, 더욱 상세하게는 산화철과 증류수,분사제를 혼합하여 제조한 산화철 용액을 이용하여 잠재지문을 채취하는 방법에 관한 것이다.The present invention relates to a method for collecting a latent fingerprint invisible to the naked eye from the surface of an object touched by a human hand, and more particularly, to collect a latent fingerprint using an iron oxide solution prepared by mixing iron oxide with distilled water and a spraying agent. It is about a method.
본 발명으로 인하여 그 동안 표면 특성상 지문채취가 불가능했던 물체에서 잠재지문 채취가 가능하고, 보다 선명한 지문을 채취할 수 있다. 또한 본 지문채취 방법은 채취 과정에서 지문의 손상 없고, 인체에 무해하다는 것, 용액제조 및 지문채취 작업이 간편하고 쉬우며, 지문을 채취하기 까지의 소요시간이 짧다는 것이 특징이다.Due to the present invention, it is possible to collect latent fingerprints from an object for which fingerprinting has not been possible due to its surface characteristics, and more clear fingerprints can be collected. In addition, the fingerprint collection method is characterized in that the fingerprint is not damaged during the collection process, harmless to the human body, the solution preparation and fingerprinting operation is simple and easy, and the time required to take the fingerprint is short.
잠재지문, 산화철, 증류수, 분산제, 에멀젼Latent fingerprint, iron oxide, distilled water, dispersant, emulsion
Description
본 발명은 물체 표면에서 사람이 손으로 만져 남겨진 육안으로 보이지 않는 잠재지문을 채취하는 방법에 관한 것으로 산화철과 증류수, 분사제를 혼합한 산화철 용액을 이용하여 잠재지문 지문을 채취하는 방법이다.The present invention relates to a method of collecting a latent fingerprint that is invisible to the naked eye left on the surface of an object by a method of extracting a latent fingerprint by using an iron oxide solution mixed with iron oxide, distilled water and a propellant.
일반적으로 물체의 표면에 존재하는 잠재지문을 채취할 목적으로 지문채취용 분말과 붓을 사용하여 물체 표면에 붓으로 분말을 발라 지문을 채취하는 방법을 사용하고 있고, 주로 유리, 알루미늄 등과 같이 표면이 매끄러운 물체에서 잠재지문을 채취하는데 이용되고 있다.In general, for the purpose of collecting latent fingerprints existing on the surface of the object, a fingerprint powder and a brush are used to apply fingerprints to the surface of the object to collect fingerprints. It is used to extract latent fingerprints from smooth objects.
그러나 이와같은 방법은 컴퓨터본체 표면, 마우스, 접착테이프, 가죽, 고무, 목재,금속, 플라스틱, 스치로폴 등 다공성 고분자 물질로 구성된 물체처럼 표면이 매끄럽지 못하거나 요철이 있는 경우나, 물체 표면이 이물질로 오염된 경우, 수분이 존재한 경우에는 지문를 채취할 수 없고, 채취하는 과정에서 붓에 의한 지문의 손상이 불가피하고, 분말이 주변 환경을 오염시킬 뿐만아니라 사람의 호흡기로 유입되어 인체에 치명적인 상해를 가할 수 있다. 또 대상 물체의 표면이 클수록 지문을 채취하는데 시간이 오래 걸리고, 채취 방법이 어렵다는 문제점이 있다.However, this method is not smooth or uneven surface such as computer body surface, mouse, adhesive tape, leather, rubber, wood, metal, plastic, styropol, etc., or the surface of the object is contaminated with foreign materials In this case, fingerprints cannot be collected when water is present, and damage to fingerprints by the brush is inevitable during the collection process, and the powder not only contaminates the surrounding environment but also flows into the human respiratory system and can cause fatal injury to the human body. Can be. In addition, the larger the surface of the target object, the longer it takes to take a fingerprint, and there is a problem that the collecting method is difficult.
본 발명은 상기와 같은 문제점을 해소하기 위해 산화철 용액을 이용하여 잠재지문이 존재하는 물체를 산화철용액 속에 담그거나 물체표면에 흘려 산화철이 잠재지문에 침전 부착하게 함으로서 그 동안 채취가 불가능한 물질, 즉 표면이 매끄럽지 못하거나 요철인 물체 및 표면에 이물질과 수분이 존재하는 물체에서도 잠재지문을 채취 가능하도록 하고, 분말이 인체에 무해하고, 지문을 채취하는데 시간이 오래 걸리지 않으며, 보다 간편한 방법으로 지문을 채취할 수 있게 하는데 목적이 있는 것이다. In order to solve the above problems, the iron oxide solution is used to immerse an object having a latent fingerprint in the iron oxide solution or flow it on the surface of the object so that the iron oxide precipitates and attaches to the latent fingerprint. It can be used to collect latent fingerprints from unsmooth or uneven objects and objects with foreign substances and moisture on the surface. The purpose is to make it possible.
이와같은 목적을 달성하기 위한 본 발명은, 입자의 분산성 및 전기적 특성, 낮은 흡유성, 무해성 등 지문채취에 적합한 산화철과 증류수,분산제를 혼합하여 산화철 용액을 제조하는 단계, 잠재지문이 존재하는 물체를 산화철용액 속에 담가 산화철이 잠재지문에 침전 부착시켜 지문을 채취하는 단계, 채취된 지문을 행구고 사진 촬영 또는 지문을 전사하는 단계로 이루어진 것에 특징이 있다.
In order to achieve the above object, the present invention provides a method for preparing an iron oxide solution by mixing iron oxide, distilled water, and a dispersant suitable for fingerprinting, such as dispersibility and electrical properties of particles, low oil absorption, and harmlessness. It is characterized in that the object is immersed in the iron oxide solution and the iron oxide is deposited on the latent fingerprints to collect fingerprints, rinsed the collected fingerprints and photographed or transferred fingerprints.
먼저 본 발명에서 산화철 용액을 제조하는 방법은 다음과 같다.First, the method for preparing the iron oxide solution in the present invention is as follows.
산화철 용액을 제조하기 위한 제료로는 증류수, 분산제, 산화철 분말을 이용 하며, 산화철 분말로는 Fe3O4(흑색),Fe2O4H2O(황색), Fe2O3(적색),Cr2O3(녹색) 등이 사용된다. 증류수 대신 일반 수돗물이나 생수 사용도 가능하고, 분산제로는 에멀젼이사용되나 일반 용액 분산제로 사용되는 계면활성제 종류를 상용해도 무방하다.Distilled water, dispersant, iron oxide powder is used as a material for preparing the iron oxide solution, Fe 3 O 4 (black), Fe 2 O 4 H 2 O (yellow), Fe 2 O 3 (red), Cr 2 O 3 (green) and the like are used. Instead of distilled water, general tap water or bottled water may be used, and an emulsion may be used as a dispersant, but a type of surfactant used as a general solution dispersant may be used.
산화철 용액을 제조하는 방법으로는 증류수 1000cc에 산화철 분말을 5g ∼ 100g을 혼합한 후 에멀젼을 소량(1g ∼ 10g) 첨가하여 완전히 녹여 제조한다. 산화철 분말의 혼합 량에 따라 용액의 농도가 달라지며, 이는 농도가 높을 수록 지문 채취 속도가 빨라지고 채취된 지문의 색깔이 진해진다. 그리고 산화철 분말 색상의 종류에 따라 지문의 색상도 달라진다. 에멀젼이 완전히 용해될 때까지는 30분 이상이상 소요되므로 에멀젼을 증류수에 완전히 용해시킨 후 이용해야 한다.As a method for preparing the iron oxide solution, 5g to 100g of iron oxide powder is mixed with 1000cc of distilled water, and then a small amount (1g to 10g) of the emulsion is added to completely dissolve it. The concentration of the solution varies according to the mixing amount of the iron oxide powder. The higher the concentration, the faster the fingerprint collection speed and the darker the color of the collected fingerprint. The color of the fingerprint also varies depending on the type of iron oxide powder color. It takes more than 30 minutes until the emulsion is completely dissolved, so it must be used after completely dissolving the emulsion in distilled water.
산화철 용액을 이용하여 물체 표면에서 지문을 채취하는 방법으로는 물체를 산화철 용액에 완전히 담그거나 물체 표면 위에 산화철용액을 흘려 지문을 채취하는 단계, 채취된 지문을 행구고 말리는 단계, 지문을 사진 촬영 또는 전사테이프로 전사하는 단계로 구성되며 방법은 다음과 같다. Fingerprinting from the surface of an object using an iron oxide solution may be performed by dipping the object completely into the iron oxide solution or by flowing iron oxide solution on the surface of the object, rinsing and drying the collected fingerprint, photographing the fingerprint, or It is composed of a step of transferring to a transfer tape and the method is as follows.
1. 산화철 용액을 적절한 용기에 붓고 지문을 채취할 대상 물체의 표면을 위로 향하도록 용액에 완전히 담근다.1. Pour the iron oxide solution into a suitable container and immerse it completely in the solution with the surface of the object to be fingerprinted facing up.
2. 용액 속의 산화철 입자가 침전하면서 물체표면에 존재하는 잠재지문에 골고루 부착될 수 있도록 대상물체를 약간 좌우로 흔들어 준다. 표면이 원형이면 물체를 회전하면서 산화철이 지문에 부착될 수 있도록 한다. 물체 표면에 커서 산화철용액에 담글 수 없을 경우 물체 표면을 15도 정도 경사가 지도록 기울려 용액을 위에서 아래로 흘러내리게 한다.2. Shake the object slightly to the left and right so that the iron oxide particles in the solution can be evenly attached to the latent fingerprint on the surface of the object as it precipitates. The circular surface allows the iron oxide to adhere to the fingerprint while rotating the object. If the surface of the object is so large that it cannot be immersed in the iron oxide solution, tilt the surface of the object to be inclined about 15 degrees to allow the solution to flow from top to bottom.
3. 산화철용액 속에 물체을 담글 경우 최소 5초 ∼ 30초 이상 담그고, 표면에 산화철 용액을 흘리는 경우에는 지문이 육안으로 보일 때까지 흘러내리도록 하여 지문을 채취한다.3. If the object is immersed in the iron oxide solution, immerse it for at least 5-30 seconds. If the iron oxide solution is spilled on the surface, fingerprints should be taken until the fingerprints are visible.
4. 채취된 지문은 자연건조 또는 드라이기 등으로 수분이 없도록 완전히 건조시킨다.4. The collected fingerprints should be completely dried without moisture by natural drying or dryer.
5. 완전히 건조된 지문은 사진으로 촬영하거나 투명접착테이프로 지문을 전사하여 채취한다.5. Completely dried fingerprints shall be photographed or transferred with a transparent adhesive tape.
지문을 채취할 물체의 표면의 색상에 따라 위 4가지 색상의 산화철 중 표면색과 최대한 대비가 될 수 있는 지문을 채취하기 위해서 적합한 색깔의 산화철 분말을 선택하여 용액을 제조하여 지문을 채취한다.According to the color of the surface of the object to be fingerprinted, to obtain a fingerprint that can be the maximum contrast with the surface color of the above four colors of iron oxide powder by selecting the appropriate color of the iron oxide powder to prepare a solution to collect the fingerprint.
이상에서 상술한 바와같이 본 발명은, 물체의 표면에서 잠재지문을 채취할 때 산화철 용액을 이용하여 용액 속에서 물체 표면에 존재하는 잠재지문에 산화철을 부착시켜 지문을 현출함으로서 지문의 손상 없이 채취가 가능하고, 표면의 구조 특성상 채취가 어렵거나 채취할 수 없었던 물질에서도 지문 채취가 가능함은 물론, 인체에 무해하며, 보다 선명한 지문을 채취할 수 있다. 이로 인하여 범죄사건 현장에 존재하는 범인의 잠재지문을 보다 많이 채취할 수 있어 지문에 의한 범인의 신원확인 및 수사상 중요한 증거자료로 활용하여 사건 해결에 상당한 기여를 할 수 있고, 또한 지문채취방법의 편리성과 사용 약품의 무해성으로 인하여 지문감식 분야에 종사하는 사람에게 많은 도움이 될 수 있는 것이다.As described above, when the latent fingerprint is collected from the surface of the object, the iron oxide solution is used to attach the iron oxide to the latent fingerprint present on the surface of the object in the solution, thereby exposing fingerprints. It is possible to collect fingerprints from materials that were difficult or impossible to collect due to the structure of the surface, and of course, harmless to the human body, and can capture fingerprints more clearly. As a result, it is possible to collect more potential fingerprints of criminals present at the crime scene, which can be used as important evidence for identification and investigation by criminals. Convenience and harmlessness of the drug can be of great help to those in the field of fingerprint identification.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9230705B2 (en) | 2012-09-26 | 2016-01-05 | Nack-Do Sung | Portable latent fingerprint developing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9230705B2 (en) | 2012-09-26 | 2016-01-05 | Nack-Do Sung | Portable latent fingerprint developing apparatus |
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