Alder buckthorn is native to Europe and invasive in North America.
25% WOF gives great colours, use up to 100%WOF and re-use the dye bath.
Buckthorn bark can be used without a mordant, it is a substantial dye.
In an alkaline dye bath (ph 10-11), alder buckthorn will give fantastic brick reds, no heat required! Just let the fibres ferment together with the bark.
heating will give you cinamon reds and browns.
Active dye component; anthraquinones.
The bark (and to a lesser extent the fruit) has been used as a laxative, due to its 3–7% anthraquinone content.
Packed in a resealable bag of 100 grams (3.5oz)