Mijello Mission Gold Watercolor Perfect Pan Refill, Burnt Sienna, 1 Each is handmade by first mixing carefully selected pigments with premium mediums and dispersants and ground to the finest consistency; and then stored in traditional Korean earthen pots to cultivate their extraordinary color properties. This process results in consistent color, strength and viscosity that artists can rely on. Mission Gold disperses quickly, beautifully, and evenly in water allowing the artist to better express true depth and perspective of multi-dimensional objects. With more pigment and no thickener, a little color goes a long way and there is very little color shift from wet to dry. Easily add refill to a Mijello watercolor set (sold separately).