Chemical test paper covered with film and preparation method of chemical test paper

The invention belongs to the technical field of chemical test paper, and relates to chemical test paper covered with a film and a preparation method of the chemical test paper. The method comprises the following steps: preparing polyvinyl alcohol, polyethylene glycol and vinyl acetate proportionally, and mixing the polyvinyl alcohol, the polyethylene glycol and the vinyl acetate evenly to form a protection liquid; and evenly painting the protection liquid on the chemical test paper, and airing the protection liquid, so as to form a layer of transparent protection film on the chemical test paper. The protection film is formed on the surface of the chemical test paper under the condition that use of the chemical test paper is not affected so as to prevent reaction and deterioration in a storage process. 本发明属于化学检测试纸技术领域，涉及种覆膜化学检测试纸及其制备方法，将聚乙烯醇、聚丙二醇、乙酸乙烯按比例配制，混匀成种保护液，将保护液均匀涂在化学检测试纸上，保护液涂抹在干化学检测试纸上之后晾干，晾干之后在化学检测试纸上形成层透明的保护膜。本发明在不影响化学检测试纸使用的情况下，通过在化学检测试纸表面形成保护膜而防止在存放过程中反应变质。