The watercolor paint was drained and hardened. Convenient for outdoor use as it melts when stroked with a brush soaked in water. Two types, transparent and opaque.
It is made by removing the water from the watercolor paint and hardening it into small pieces. It dissolves when you stroke it with a brush soaked in water, so it is convenient for outdoor use.

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Color  Black  Orange  Cake  Watercolor painting  ホルベイン  Holbein  絵具  Holbein Artists'  Holbain solid watercolor paint opaque cake color color set diameter 30 mm  ホルベイン画材(Holbein Art Materials)  Color solid  dark green