JIS K5101-16-2-2004 "Pigment test methods, Part 16: water soluble substance. Section 2 Extraction at room temperature", focusing on the determination of pigment water soluble substance at room temperature environment. The standard covers sample pretreatment, room temperature extraction conditions setting, extraction purification and content detection, etc., clarify quantitative analysis methods such as weight method, standardize instrument operation and result calculation methods, to determine the content of water soluble substances in pigment, measure the purity and applicability of pigment.
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