| 主权项 |
1. A method, comprising:
providing at least one base powder having a median particle size of at least 25 μm; providing at least one non-incorporated white pigment; providing at least one non-incorporated coloring pigment; and mixing the base powder, the non-incorporated white pigment and the non-incorporated coloring pigment in dry form for about 15 to 30 minutes to form a colored mixture, wherein at least a majority of the non-incorporated white pigments and the coloring pigments on the surface of the base powder are distributed on the surface of the base powder and are capable of being re-distributed to another base powder upon further mixing, wherein the colored mixture is a free flowing powder, and wherein the colored mixture comprises at least 1 wt. % non-incorporated white pigment, based on the total weight of the colored mixture. |
