Results and discussion
The obtained results suggest that the colorant from red prickly
pear can be considered a potential source of natural food coloring
(Fernandez-Lopez and Almela, 2001; Kanner et al.,
2001). In our study, betalain pigment extracted from red
prickly pear is used for dyeing wool; this dye is water soluble
and has to be fixed to make the color fast or permanent, using
fixatives or mordents, and it is stable in pH range of 4–7.