Scarva GZ2211 Stoneware Charcoal From  £14.80

This glaze has become one of my stock reliable glazes and I've used it on stoneware and porcelain. I get the best results at the lower end of the firing range- towards the higher end it becomes more shiny black. But at 1220 its grey matt as pictured in my kiln. If I had a criticism I'd say that, like most matt glazes, it tends to solidify in the storage container so best use a sturdy wide based one and stir thoroughly between pots when glazing.

Ive had this glaze a couple of times but this last batch has proved a little different. It solidifies quite hard if left a few days between stirs. It has also developed a white tinge to it when dipped, even if stirred well. It settles with the white on top and even with mixing, still separates.
I have bought the pre mixed brush on glaze for stability which works well. I have been put off the dipping version now.

Reliable effective glaze. True to colour. Now one of my staples.

Excellent product! Highly recommended.

Have used it on white clay and shamot at 1240-1250*, never got it matt. Every time appeared to be nice black but perfectly glossy.