Scarva DS1010 Black Decorating Slip From £9.18

With some testing I eventually managed to get a nice deep black colour, at 1140 and underneath a transparent glaze from a different supplier.

I used this with a Scarva white earthenware body and can't comment on any other clay.

I use it on Scava porcelain paper clay at 1220°C and it gives a rich opaque black, even with just one coat. (At 1000°C it is grey).