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GA/T 1696-2019: Forensic sciences - Specifications for classification of blemished paper appearance
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| GA/T 1696-2019 | English | 139 |
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Forensic sciences - Specifications for classification of blemished paper appearance
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GA/T 1696-2019
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Basic data | Standard ID | GA/T 1696-2019 (GA/T1696-2019) | | Description (Translated English) | Forensic sciences - Specifications for classification of blemished paper appearance | | Sector / Industry | Public Security (Police) Industry Standard (Recommended) | | Classification of Chinese Standard | A92 | | Classification of International Standard | 13.310 | | Word Count Estimation | 6,675 | | Date of Issue | 2019 | | Date of Implementation | 2019-12-01 | | Issuing agency(ies) | Ministry of Public Security | GA/T 1696-2019: Forensic sciences - Specifications for classification of blemished paper appearance
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Forensic sciences - Specifications for classification of blemished paper appearance
ICS 13.310
A92
Public Safety Industry Standard of the People's Republic of China
Forensic scientific paper inspection specification for classification of appearance paper diseases
Published on October 14,.2019
2019-12-01 Implementation
Issued by the Ministry of Public Security of the People's Republic of China
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the Sub-Technical Committee of the National Criminal Technology Standardization Technical Committee (SAC/TC179/SC10) and
Be in charge.
This standard was drafted by. Beijing Municipal Public Security Bureau, Physical Evidence Appraisal Center of the Ministry of Public Security.
The main drafters of this standard. Zhang Jianzhou, Wang Xin, Huang Yan, Liang Luning.
Forensic scientific paper inspection specification for classification of appearance paper diseases
1 Scope
This standard stipulates the classification of the appearance of paper diseases in the court scientific paper inspection.
This standard applies to paper inspection and identification in the field of forensic science.
2 Terminology
The following terms and definitions apply to this document.
2.1
Appearance paper disease
Various defects and defects that can be directly observed on the surface of the paper sheet.
3 Classification of appearance paper diseases
3.1 Poor uniformity
The uniformity of the paper indicates the uniformity of the paper structure, that is, the uniformity of the distribution of fibers, fillers and coatings in the paper. Poor uniformity
It is now a cloud flower, a pulp channel, a clumpy tissue, etc., and its characteristics are as follows.
a) Cloud flower. The irregular, uneven cloud-like structure observed when observing paper through light.
b) Pulp path. due to the uneven distribution of fibers, visible and visible fibers gather to form strip-shaped pulp marks.
c) Tufted structure. The fibers flocculate with each other to form a clumped state, and are randomly distributed in the paper.
3.2 Dust
The dust is exposed on the surface of the paper and can be seen under any irradiation angle, and there are various variegated dots with obvious color differences from the paper surface.
Common ones are.
a) Fibrous dust;
b) Non-metallic dust;
c) metallic dust.
3.3 Fold
Common types of folds are.
a) Pleats. folding marks or creases caused by folding or overlapping of paper sheets, including live pleats and dead pleats.
b) Bubbling. The paper sheet is partially contracted, resulting in protruding bubbles on the paper surface and fine wrinkles on the blistered paper surface.
c) Seersucker. There are densely arranged small bubble points on the paper surface, just like "seersucker" cloth.
3.4 Spot
Speckles are the same as the paper, but the light and dark colors and reflections are not consistent with the paper. Common types are.
a) wet spots;
b) Steam spot;
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