Scarva Nano Colours NPD005 Gooseberry Porcelain Decorating Slip From  £16.07

I've been using this on white stoneware under a transparent glaze, and I love how bright and happy this colour is!

I think it comes out more of a yellow and less of an orangey-yellow (as shown in the picture), but I prefer the colour it comes out in in my own tests. I haven't tried it unglazed, but have coated it in a glossy transparent.

(Bisque fired to 1000 degrees, glaze fired to 1260 degrees in an electric kiln)