Examples from the Web for archil
Hydrochloric acid turns ammoniacal cochineal pink, but merely discolours the red made from archil.The Decoration of Leather|Georges de Rcy
Instead of archil, any red or orange azo dyestuff may be used, preferably bordeaux.
It is however not improbable that they at first made lacmus of them, as their dye approaches very near to that of archil.
A less fast color is obtained with archil, indigo carmine and picric acid.
Archil and annotto are frequently used to soften and beautify the tint.A Dictionary of Arts, Manufactures and Mines|Andrew Ure