How to mix metal color watercolor paints

Quick answer：

Mixing metal color watercolor paints requires a combination of the desired pigment with a binder that is compatible with watercolor mediums. Start by adding a small amount of pigment to the binder, then gradually mix until the desired consistency is achieved. It's important to note that the metal pigments might be more opaque, so you may need to adjust the amount of binder used. Experiment with different ratios to find the perfect blend.