From the manufacturer:
These glazes are saturated in color with a satin matte finish.
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.
All Opulence Glazes are Lead and Barium Free, Food Safe, Dishwasher Safe and Microwave Safe.
Although Satin Matte Glazes fire beautifully at C/6, for a more matte effect, try C/5 with a 30 minute hold. We do recommend thorough testing under your circumstances to assure good results.