cochineal

Ingredients

cochineal, alum, carminic acid

Preparation Steps

Original Recipe Text

The red ink was composed of cochineal and alum (p. 75).

Evidence

"sample 16 which was treated with the red ink composed of cochineal and alum was the one of the most stable inks together with sample 9 and sample 10. (p. 75)"

Remarks

The red ink (Sample 16) was identified as one of the most stable inks in the study. This stability is attributed to carminic acid, which is described as a stable pigment (p. 75). Colorimetric results showed a very low change in lightness (delta L* = -1.21) and minimal total color difference (delta E) (p. 74).