Winsor & Newton - Brush Cleaner and Restorer Japanese Paper Place This willow charcoal powder is

This willow charcoal powder is ideal for large scale art work

bottle of Diazo Sensitizer

indanthrene blue

average drying time (medium alone on glass plate) : 1 day

yet cleans up easily with soap and water

Winsor & Newton - Brush Cleaner and Restorer Japanese Paper Place This willow charcoal powder isWinsor and Newton cleaner for dried acrylic, oil, and alkyd colour, is a non toxic, biodegradable, nonflammable, non abrasive, low vapour product that safely and easily cleans both natural and synthetic brushes without damage to the brush head. It is not recommended for use on painted or varnished surfaces; contact with brush handles should be avoided. Not for use with polycarbonate or other plastic surfaces.