|Monthly Tech-Tip |
These are actually two different cone 6 base glazes to which I add a black stain (4 and 5%). I trust them because I formulated and perfected them myself. Stains are inherently much safer to use than raw metal oxide colorants because they are sintered as colorant/stabilizer blends. And much less is needed (15% of blends of nickel, cobalt, iron and manganese are traditionally used).