Green

The source lists Bentonite twice at 2.9% and 2%; both entries are preserved. Test on tiles; use appropriate ventilation and PPE, avoid inhaling dust, review raw-material safety information, and verify functional or food-contact suitability with fired-glaze testing.

Ingredients

Material%
Nepheline Syenite40
Silica30
Gerstley Borate20
EPK Kaolin10
Sodium Bentonite2.9
Copper Carbonate2.9
Sodium Bentonite2