Sunday, 13 July 2008

Is There a Slip Doctor in the House ?

Look at these Peas Marion has picked this morning, they look right tasty, especially in this Doug Fitch Bowl. At least the Peas were the green colour they were supposed to be, it's a shame the same can't be said for my new Green slip.



Opened the Bisc firing yesterday, I had made up a batch of green slip luckily I did a test pot. 100% Ball Clay 5% Copper Carbonate. The recipe said Copper Oxide, but I didn't have any so I used Copper Carbonate. any suggestions would be welcome.

Don't worry about the cone not bending, that was just a precautionary measure to stop me over firing.


7 comments:

Hannah said...

Glaze them anyway and see. One of my slips just looks grey at bisque. Anything can happen, it usually does!

Ron said...

That's pretty much what my green slip looks like when it's bisqued. I mine has 6% copper carb in it (in a white slip base). The glaze will change it for sure.

Earl & Vickie said...

I don't know the formula for substitution, but Carbonate doesn't have as much actual copper in it as oxide.

Alan from Argyll Pottery said...

In stoneware it's usually between 3 and 5% - that's more than what you have not on top of it (If you see what I mean) but copper carbonate is a lot more stable so I'd go with carb not ox' if I were you.

doug fitch said...

I think it'll be fine, maybe a little pale, but fine. Cop Ox tends to be about twice as strong I think, I use 5% copp ox. A lot depends on the glaze that covers it too. Look foward to seeing finished pots.

ang said...

she'll be right mate...starts out brown soon turns green......bung her in a glaze firing and at risk of mixing my cultural metaphors- bobs ya uncle!

paul jessop said...

OK It's in the glaze firing today.

Time to start planning for the show season.

Show Time is fast approaching it's that time of year when you have to think about how you want to present yourself to the world! ...