Comes in crystalline form. Excellent for staining papers to give an aged/antique appearance. Make your solution by mixing approximately 1 teaspoon of crystals to a half cup of hot water - more or less depending on depth of colour required. Easy to achieve a colour gradation that gives the appearance old aged documents. Now comes packaged in rigid 30g jars.
We also have our own booklet 'Let's Play with Walnut Ink', - all you need to know about using walnut ink. Lots of illustrations, 20 pages.