Filling paint in the closed recess area on semi-finished products after polishing / plating called coloring.
There are three kinds of paint – soft enamel, colorful epoxy and soft cloisonne.
Soft enamel and colorful epoxy are filled on plated products. Soft enamel is less shiny, however colorful epoxy is bright-colored and shiny.
Soft cloisonne should be filled on the raw models then polished when the paint gets solid till seeing different color area, and finally plated. So there will be tiny polishing lines on the soft cloisonne surface, and the metal borders are at the same level as the colored area which is the feature of soft cloisonne.