The colour powder particles dissolve faster than the walnut crystals, so you can control how much colour-to-brown stain ratio you get by:
1. the amount of water you apply, and
2. when you apply water (before or after sprinkling the powders) and
3. how soon you dry the wet paper or fabric after applying water.
Blotting before drying will produce a softer result.
Make the product permanent by using with PaperArtsy glazes instead of water, or add gum arabic to the mix as another 'binding' option.
Available in 24 unique colours. They are sold in small bottles with aluminium caps. To dispense, simply poke a hole in the cap and sprinkle in the concentration of your preference.