From the manufacturer:
These glazes are Glossy and are formulated to form a gas or wood fired look in a C/6 electric kiln. Reduction Look glazes do flow and break into secondary colors.
Opulence Glazes are thicker than most glazes and are therefore more forgiving before fired. They can be rubbed, sanded and scraped without adverse affects. In liquid form, Opulence Glazes can be dipped, poured, sprayed or brushed without the addition of deflocculants, binders, etc.
Opulence Glazes are compatible and may be blended by volume or weight to create an infinite variety of colors, shades and effects. Example: equal parts 605 and 600 make a nice flow blue. Of course we recommend testing any combination to assure good results. By Overlapping any Reduction Look 600 series over any Basic or EnviroColors glaze you can achieve nice flow and movement. We recommend that this overlap not be used too close to the bottom due to this nice flow.
All Opulence Glazes are Lead and Barium Free, Food Safe, Dishwasher Safe and Microwave Safe.
Although Opulence Glazes were designed for C/6 electric firing, customers have reported successful results in gas or wood kiln as well as at various temperatures and conditions. We do recommend thorough testing under your circumstances to assure good results.