Dr. Ph. Martin's : Radiant Watercolour Paint Dye : 15ml : Slate Blue

• Brilliant concentrated watercolour dye
• For brush, pen, or airbrush
• For work intended to be reproduced
• Cartooning, manga, anime, illustration, graphic arts
• 56 brilliant concentrated colours
• Conforms to ASTM d-4236 AP approved NON-TOXIC
• Use on paper, illustration board, silk with additives

Not lightfast, not waterproof. For work intended to be reproduced. The colours will fade from sunlight or fluorescent light (ultra-violet). Will not fade in a portfolio, or under incandescent light. protect from fading with ultra-violet absorbing glass, plexiglass or UVA acetate.
Make permanent on fabric (textile) silk, cotton, batik, tie dye when used with additives as follows: salt and vinegar, alum, or soda ash (calcium carbonate). Make a test piece first to make sure of the washfastness of the dye on fabric.
Mixing Radiant with heavy body acrylic makes it waterproof and lightfast. We recommend your own testing for these results.
Epoxy, polyurethane, clear UVA acetate (for framing), ultra-violet absorbing glass (for framing) can also be used for reducing fading.