A complete PCB plating process includes post-treatment of plating. Broadly speaking, all electrodeposited coatings are post-treated after completion of plating. The simplest post-treatment involves hot water cleaning and drying. And many coatings also require passivation, coloring, dyeing, sealing, coating and other post-processing, in order to make the performance of the coating better play and strengthen. The plating post-treatment methods can be divided into the following types: 1. Cleaning;
2. dry; 
3. Dehydrogenation; 
4. Polishing (mechanical polishing and electrochemical polishing); 
5, passivation; 
6. Coloring; 
7. Dyeing; 
8. Closed; 
9. Protection; 
10. Painting; 
11. Removal of unqualified coating; 
12. Bath recovery. According to the use or design purpose of metal or non-metal electroplating products, the subsequent treatment can be divided into three categories, namely to improve or enhance the protective, decorative and functional.
 (1) Protective Aftertreatment All protective coatings other than chrome plating, if used as surface coatings, must be properly post-treated to maintain or enhance their protective properties. The most common post-treatment method is passivation. The protection requirements are relatively high but also for surface coating treatment, such as cover coating treatment, from the environmental protection and cost considerations, can use water-based transparent paint.
(2) Decorative post-treatment Decorative post-treatment is a common process in non-metallic electroplating. Such as imitation gold, imitation silver, imitation antique copper coating, brushing, coloring or dyeing and other artistic treatment. Most of these treatments also require the surface to be recoated with transparent coating. Sometimes also use color transparent paint, such as imitation gold, red, green, purple and other colors of paint. 
(3) Functional post-treatment Some non-metallic electroplating products are designed for functional needs, and some functional treatment should be carried out