Chemical graining: the lithographic plate surface is etched to produce a fine grain by the application of a strong acid or alkali solution.
化学磨版:用强酸或强碱溶液在平版印版的版面上腐蚀,造成幼细微粒表面。
2
Objective:To investigate the appearance of enamel on the cross section of tooth after etched with 37% phosphoric acid for different etching time .
目的:观察用37%磷酸凝胶以不同酸蚀时间处理后的牙釉质在牙齿横断面上的形态改变。
3
The results indicate that the surface etched by acid solution is comparative smooth, the surface filled with the uniform etched pits, and very low reflectance.