I myself had brought a cargo of madder roots from which a rose tint would be derived.
Like, the color blue is made from indigo, greens out of indigo mixed with pomegranate, red from madder root and yellow from turmeric.
The only available red fabric dye in 1748 was made of madder root, which can be processed to produce a brilliant red dye (used historically for British soldiers' jackets).
Rubian was obtained from the water extract of madder root by adding bone-charcoal and extracting the bone-charcoal with ethanol.
Rubian was an uncrystallisable gum, hydrolysable by acids or an enzyme contained in the madder root to give alizarin and a sugar.
He is credited with first mentioning in this work of staining of bone, with madder root.
This alizarin concentrate, makes only 1% of the madder root.
Use 50g/2oz powdered madder root from a dye supplier.
In 1826, the French chemist Pierre-Jean Robiquet found that madder root contained two colorants, the red alizarin and the more rapidly fading purpurin.
Murtagh had left for Lisbon that morning, vials of nettle juice and madder root in his pouch.