Acorn extract is an environmentally friendly product that does not pollute the environment during application as a natural tannins. Areas of application can be counted as natural dye in vegetable leather tanning, fabric dyeing and as a glue additive in mdf / chipboard industry. When used on its own gallnut extract produces beiges on wool, cotton and silk. With an iron after-bath, the color changes to greys and black. This extract can also be used to sharpen other colors. However, gallnut extract is also very useful for the mordanting effect of the tannin. Gall nuts are a traditional source of black dye on silk: “black loaded with Lyon”. In medieval Europe and the Renaissance, half of the black dyes mentioned in the old treatises are made from gall nuts.
