'Carthamin' is a natural red pigment derived from
safflower (''Carthamus tinctorius''). It is used as a dye and a food coloring. As a food additive it is known as Natural Red 26.
It was used extensively in the past for dyeing wool for the carpet industry in European countries.
[1]
References
1. Carthamus tinctorius (Safflower), a commercially viable dye for textiles. Vankar, Padma S.; Tiwari, Vandana; Shanker, Rakhi; Shivani. ''Asian Dyer'' (2004), 1(4), 25-27.