摘要 |
PROBLEM TO BE SOLVED: To provide a plane smoothing process which is easy when a process tank is formed by expansion molding. SOLUTION: When the process tank 22 used for a PS plate processor is method by expansion molding, an aqueous silicone coating material or liquid rubber coating material is applied on the surface of the process tank. As a result, the surface is smoothed by filling the wrinkle-like fine grooves generated on the surface of the process tank when formed by the expansion molding. The rising of the processing liquid by the capillarity caused by the fine grooves may be thereby surely prevented without the execution of vapor processing using a solvent. Since the vapor processing is not executed, the working hygiene and safety may be improved and the cost may be lowered. |