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Forensic sciences - Technical specifications for latent fingerprint development by powder
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Basic data
| Standard ID | GA/T 2085-2023 (GA/T2085-2023) |
| Description (Translated English) | Forensic sciences - Technical specifications for latent fingerprint development by powder |
| Sector / Industry | Public Security (Police) Industry Standard (Recommended) |
| Classification of Chinese Standard | A92 |
| Classification of International Standard | 13.310 |
| Word Count Estimation | 6,646 |
| Date of Issue | 2023-03-01 |
| Date of Implementation | 2023-12-01 |
| Issuing agency(ies) | Ministry of Public Security |
GA/T 2085-2023: Forensic sciences - Technical specifications for latent fingerprint development by powder
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 13.310
CCSA92
Public safety industry standards of the People's Republic of China
Technical Specification for Forensic Science Powder Revealed Fingerprints
Implemented on 2023-12-01
Released by the Ministry of Public Security of the People's Republic of China
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is submitted by the Criminal Investigation Bureau of the Ministry of Public Security.
This document is under the jurisdiction of the Fingerprint Inspection Sub-Technical Committee of the National Technical Committee for Standardization of Criminal Technology (SAC/TC179/SC3).
This document was drafted by. Zhejiang Provincial Public Security Department Criminal Investigation Corps, Ministry of Public Security Identification Center, China People’s Public Security University, Hangzhou Municipal Public Security
Bureau, Jilin Provincial Public Security Department Physical Evidence Identification Center, Qiqihar Municipal Public Security Bureau Criminal Technical Detachment, Dongguan Municipal Public Security Bureau Criminal Police Detachment.
The main drafters of this document. Yao Yuewu, Liu Huan, Xu Linmiao, Luo Yaping, Shi Taoning, Zhu Qiang, Jin Tianhong, Zhang Luyi, Yin Kehua, Shen Di,
Qu Huiying, Ma Rongliang, Li Xiaojun, Xue Jing, Qin Qi, Lu Yufan, Xu Xi, Wang Wanxin, Feng Tao.
Technical Specification for Forensic Science Powder Revealed Fingerprints
1 Scope
This document specifies the applicable objects, equipment, reagents, operating environment requirements, operating steps and precautions for the forensic science powder fingerprint display method.
matter.
This document is suitable for displaying potential fingerprints left on the surface of dry non-permeable objects and partially semi-permeable objects for a certain period of time.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 23865-2009 Proportional photography rules
GA/T 144-2018 Forensic Science Fingerprint Terminology
3 Terms and definitions
The terms and definitions defined in GB/T 23865-2009, GA/T 144-2018 and the following apply to this document.
3.1
powderpowder
A collection of discrete solid particles that can be used to reveal potential fingerprints.
Note. Commonly used potential fingerprint-revealing powders, such as aluminum powder, copper powder, magnetic powder, fluorescent powder, etc., are usually prepared in a certain proportion with a particle size of 13um~150um.
mixture of particles. The particle size of nanopowder is usually between 1nm and 100nm.
3.1.1
A powder that can produce magnetism under the influence of a magnetic field and fluoresce when illuminated by excitation light of a certain wavelength.
3.1.2
magneticnon-fluorescentpowdermagneticnon-fluorescentpowder
A powder that can produce magnetism under the influence of a magnetic field and cannot emit fluorescence under various excitation lights.
3.1.3
It is a powder that is not affected by magnetic fields and cannot produce magnetism, but can emit fluorescence when illuminated by excitation light of a certain wavelength.
3.1.4
Non-magnetic non-fluorescent powdernon-magneticnon-fluorescentpowder
It is a powder that is not affected by magnetic fields, cannot produce magnetism, and cannot emit fluorescence under various excitation light irradiations.
4 Principles of manifestation
Physical adsorption and electrostatic adsorption occur between the sweat or grease in the fingerprint material and the powder, causing the colored powder particles to adhere to the potential
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