C.I. Pigment No.: Pigment Blue 29

C.I No.: 77007

CAS No.: 57455-37-5

Molecular Formula: Na₆Al₄Si₆S₄O₂₀

Manufacturing Process:

Calcination production process: Blend the raw materials including clay, soda ash, sulfur, charcoal, sodium sulfate, quartz, etc. Put the mixture into kiln to be calcined at high temperature(high-temperature calcination). Select the unburned material and wash it after colling. Then through wet grinding, pressed filtering, drying,  crushing and packaging, get the ultramarine products.

Manufacturing Process Flow Chart:

Photo of Packing：