3#-7# suitable for wall paint and tempera(scenery)
9#-11#suitable for wall paint and tempera (figure)
13#-15#suitable for making watercolors
Shanqu "amethyst" of natural mineral pigments
In the natural mineral pigments where meet purple, the heart will be intoxicated so elegant like a dream
This seemingly simple mineral has a great difficulty, amethyst contains a variety of iron small to almost invisible to the naked eye conventional in addition to the magnetic tools can only handle part, if you want to get rid of all impurities need to be magnetic to 23000 gauss, ore in the fine iron impurities just can all out and not wet magnetic selection, to dry out thin layer of particles, layer of slow, this extremely test pigment division technique and experience, so repeated more than 15 times beautiful pure amethyst pigment is really made
