Non-staining Blue for Gum?

TERRY KING (KINGNAPOLEONPHOTO@compuserve.com)
Thu, 09 Apr 1998 05:22:13 -0400

Message text written by FotoDave
> Is ultramarine less staining? How about
Cobalt blue? Cerulean is so grainy that I don't know if I want to use it.<

Dave

I have found that French Ultramarine, Cobalt Blue and Indigo are very
effective. Indigo has the advantage that you need very little of it to get
a strong tone but when you do use very little indeed you will probably get
the colour you were seeking..

Terry