color spots

Causes and precautions for concrete superficial coloured speck;

混凝土表面色斑形成原因及防治措施

This paper systematically explains the cause of metal patch formation and puts forward prevention measure of lacquer film during the painting and decoration of passenger train production.

系统地介绍了客车涂装生产中金属色斑的形成原因及防治措施。

The paper introduces ink transfer process of offset press and the development of coating structure of pigment coated paper,expatiates the interactions of coating structure and offset ink,proposes the mechanisms that cause backtrap mottle.

介绍了胶版印刷中印刷油墨的转移过程及颜料涂布纸的涂层结构的形成,阐述了涂层结构与印刷油墨固着的关系及涂布纸上Backtrap色斑的形成机理,指出涂层表面的物理和化学性质不“稳定”是引起Backtrap色斑的主要原因。