本文件规定了测定水溶性压敏粘合剂在水中的溶解度或碱溶性压敏粘合剂在碱中的溶解度的试验方法，方法是测量浸入水或碱中时粘合剂的质量损失。粘合剂的溶解性是评估使用压敏粘合剂固定标签的产品回收可能性的关键因素之一。

This document specifies a test method for the determination of the solubility of a water-soluble pressure-sensitive adhesive in water or the solubility of an alkali-soluble pressure-sensitive adhesive in alkali by measuring the loss in mass of the adhesive when immersed in water or alkali. The solubility of the adhesive is one of the key factors in assessing the possibility of recycling products to which labels are fixed using a pressure-sensitive adhesive.