Finetech Pearlescent paints are highly pigmented mica watercolors that add radiant luster to your work. Colors can be used for painting or calligraphy and are semi-permanent on porous surfaces including paper, wood, and plaster. These individual refill pans securely snap into all Finetec watercolor tins. Mystic Color is an interference or “flip-flop” pigment that appears as green or grey when viewed from different angles. A product of Germany.