Standard Number: GA/T 1657-2019(GA/T1657-2019)
Chinese:法庭科学 圆珠笔字迹色痕检验 液相色谱法
English:Court Science Ballpoint pen handwriting color mark test Liquid Chromatography
Effective Date:2019-12-01
Standard Applicability:This standard applies to the court scientific field of blue, black ballpoint pen handwriting color marks in the dye composition of the comparison test.
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