Chopped roots of the madder plant (Rubia tinctorum) for dyeing red hues. Madder is known for its good washing fastness and lightfastness, meaning that the colours won't fade much under the influence of water or sunlight. Because of these properties madder is used for dyeing ever since the new stone age.
The dyeing substance that gives the red colour, alizarine, is present in the roots of the plant that sometimes have a length of over a meter. This specific madder was grown and produced in the Netherlands.
Vegetable dyes work best on fabrics of one material composition. When using madder, the fabric should be pre-treated with a mordant.