: DMCosta - Viewing Profile

Hi,

I am new to making my own glazes and I have a low fire recipe that calls for "Copper Oxide" It is a bright turquoise blue green glaze from a book published in England. When they say "copper oxide" do you think they mean "Red Iron Oxide" or my "Copper Oxide Black"? Thank you!

~Dianna

Hi All,

I am all set to begin making my own glazes this week. I am going to start with small 100 gram batches, I have gotten my low fire recipes from Emmanuel Cooper's potters book. There are no glaze making classes available anywhere and my only offer was expensive private lessons. I am a competent person, so I am trying to figure it out on my own. One issue though, on more than one of the glazes I want the variation not the base glaze. I put an example of two below. I have figured out if it has one percentage variation how to factor that in, but what about two or even three? I am terrible at math but my husband is great at it, so although I know it may not be the easiest thing to explain via online, can anyone help out with this? I appreciate any help, Dianna.

Opalescent Blue Glaze (one with two percentages)
Spodumene 20
Calcium Borate frit 50
Ball Clay 12
Flint 18
Rutile 3%

Variation: 0.75% cobalt carbonate