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"Perite" of natural mineral pigments:
Dipyroxene is a calcium-magnesium silicate mineral often distributed in basic and ultrabasic rocks. The difficulty of making dipyroxene is in the selection stage. Because dipyroxene is often associated with other minerals, so the raw materials should be carefully selected repeatedly
Through pyroxene in the first grinding of the first time ultra fine powder to all discarded, this is because the crystal joint properties and choice, because pyroxene associated impurities is usually smaller than the pyroxene density, when grinding usually associated ore broken first, and then through pyroxene, master this characteristic, through gentle grinding, countless sieve, discarded first broken powder, although this process will lose a lot of pyroxene, but stay will become very beautiful clean, this is why through pyroxene pigment price is not low.
However, this series of complex processes is only just about preparing for the upcoming production.
In the following production, we found that the transmroxene is basically stable containing three impurities: iron micite and some light mineral.
Their content is very small, but it does exist, this kind of impurities can not be removed by hand with the ancient method, so the general producer to this step is over, at this time of the bright stone is barely able to use, non-professionals can not see the impurities inside
But for Shanqu, such quality is not good.
After measuring the specific gravity of pyroxene and its impurities, the mountain chose "jump method" to purify it, each time "jump" only took the top pure pigment repeatedly a hundred times, layer by layer finally got pure natural mineral pigment: pyroxene.
Shanqu's pyroxene is the highest saturation of the highest purity of the market pyroxene paint will be painted on the paper luster glass, the emerald full of gems slowly falling on the Buddha sky river
