Van Dyke Crystals are a traditional and natural water based wood dye made from walnut husks. They produce a colour ranging from a very light brown to dark brown depending upon concentration. Dissolve the crystals in hot water (approx 100g-1 Litre). Test the colour on a spare piece of wood, darken by adding more crystals and lighten by adding more water. To obtain different shades, Liberon Concentrate Water Based Dyes can also be added to the solution. Before applying, ensure the surface is bare, dry and free from dust. Apply with a brush or sponge and wipe off excess with a cloth. Allow to dry for at least 12 hours, then rub down lightly with wet and dray paper (240-360 grit).