Mason Stains® By Mason Color 6381 Blackberry Wine Stain From  £11.90

I used this stain in a vitreous slip and fired it to 1220. I was expecting the luscious dark purple stain I saw on my screen and instead I got a dirty pale grey. These stains are very expensive and far too often they simply don't work. Very disappointed and fed up.

Same thing happened to me, completely burnt out and turned grey! :(