| 摘要 |
PROBLEM TO BE SOLVED: To obtain a glass product effectively preventing damage and fouling and less liable to the dissolution of the protective film even when dew condensation is caused on the surface by forming a protective film of water-soluble PVA having a specified average polymn. degree and a specified saponification degree by coating on a part or the whole of the surface of a glass product. SOLUTION: A protective film of water-soluble PVA having an average polymn. degree of <=600, preferably <=300 and 40-95mol%, preferably 55-85mol% saponification degree is formed on a part or the whole of the surface of a glass product in 0.001-1,000μm, preferably 0.01-500μm thickness by coating with an aq. soln. consisting of 0.01-90wt.% of the said PVA and 10-99.99wt.% water. The resultant glass product is suitable for use as a glass substrate for a flat panel display or a cathode-ray tube.
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