GB/T 37239-2018 in English
VALIDSpecification for forensic identification of handwriting
- Issued on:2018-12-28
- Implemented on:2019-04-01
- File Format:PDF
- Delivery:Via email within 5 business days
$359.00
| Standard No: | GB/T 37239-2018 |
| Document status: | VALID |
| Title in English: | Specification for forensic identification of handwriting |
| Title in Chinese: | 笔迹鉴定技术规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2018-12-28 |
| Implemented on: | 2019-04-01 |
| ICS Classification: | 13.310-Protection against crime |
| Chinese Classification: | A92-Crime judging technology |
| Professional Classification: | GB-National Standard |
| Related Keywords: | signature handwriting
handwriting features handwriting feature system abnormal handwriting first time abnormal handwriting inspection identification |
| Related Topics: | Pen
trace Document Production Time Identification Technical Specification Identification GBT37239 GB/T 37239-2018 Identification technology defined by gb169992010 ph pen calibration Handwriting identification technology |
《GB/T 37239-2018笔迹鉴定技术规范》由315（司法部）归口，主管部门为司法部。
Introduction
Analysis of the Standard Technical Framework
| Core Chapters | Technical Points | Innovative Provisions |
|---|---|---|
| Classification of Handwriting Features | 8 Major Feature Systems | The Technical Value of Handwriting Features is Clarified for the First Time |
| Abnormal Handwriting Inspection | Identification of 3 Types of Abnormal Handwriting | Establish a Progressive Inspection Process for Condition Change/Disguise/Imitation |
| Expression of Identification Opinion | 9 Opinion Types | Quantification of Non-deterministic Opinion Standards such as "Highly Probable Identity" |
Innovation of handwriting feature system
The standard divides the handwriting feature system into eight categories: writing style, layout, writing method, shape, structure, stroke order, pen movement, and pen traces, among which the introduction of pen trace features is of groundbreaking significance. Through a microscope, it can be observed that:
- The distribution of white ink in ballpoint pens
- The accumulation of ink in fountain pens
- The wear characteristics of writing tools
Breakthroughs in signature authentication technology
Chapter 8 of the standard specifically stipulates the key points for the inspection of signature handwriting:
- Pattern analysis: Distinguish 7 signature modes such as forward/reverse/connected writing
- Dynamic characteristics: Test the matching degree of writing speed and strength
- System comparison: Requires simultaneous analysis of related handwriting such as the date of signature
Suggestions for judicial practice application
According to clauses 9.2-9.4 of the standard, it is recommended that the authentication agency:
| Material type | Minimum sample size requirement | Key points for feature comparison |
|---|---|---|
| Normal handwriting | 5 samples from the same period | Focus on comparing pen movement continuity |
| Disguised handwriting | 10 experimental samples | Analyze unconventional writing movements |
| Imitate signatures | 3 natural samples + 2 experimental samples | Test the distribution of pen pressure |
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