The invention discloses a PVD color-gradient
coating technology for a color-gradient
cell phone rear cover. The PVD color-gradient
coating technology comprises the following steps that (1), a base material is
cut into a substrate; (2), by using a
vacuum coating technology, the substrate is coated with a first PVD film, and the first PVD film is subjected to
abrasive blasting or wiredrawing or
polishing; (3), the first PVD film is coated with a
varnish film; (4), patterns are carved in the
varnish film, wherein the
carving depth is higher than the thickness of the
varnish film; (5), the carvedpatterns are coated with a second PVD film by using the
vacuum coating technology; (6), the varnish film is removed; (7), dip-
dyeing is conducted; (8), strengthening
processing. By using a dual-colorvacuum
coating technology, the planar patterns or recessed space patterns with high marginal definition can be obtained, the patterns are bright in color, and any existing PVD colors can be adopted without being limited to the colors of Ti and Zr target materials; the diversity of the dual-color
vacuum coating is increased, the appearance effect of the color-gradient
cell phone rear cover is ensured, the color-gradient coating of the
cell phone rear cover is ensured, and the appearance is ensured.