In order to test a range of colours, I have made up a base glaze into which I will add a % of an oxide. (First one will be cobalt as it may soon run out! and it's my fave!)

Dolomite Matt Glaze

Feldspar 50%

Dolomite 20%

China Clay 20%

Bone Ash 10%

As I was making 1kg of glaze I X'd it all by 10.

To add a speckle to the glaze I added Rutile

(as I write this, I realise that I haven't noted down how much Aggh - lesson learnt. It should have been 7 for 100, therefore 70 for 1kg. I'm sure Dave or Geoff will be able to tell me exactly how much I put in!)

Testing to take place after the tiles have come out of bisque and after a short trip from Lands End to John O'Groats!