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Wyndham

Looking For C6 Gloss White W/dolomite

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I was thinking about making a gloss white c6 with enough magnesium aka dolomite or talc to have both a white(w/zircopax) and a lavender w/ a touch of cobalt carb. Any idea how much mag carb is needed to shift cobalt to a pale lavender, maybe a shade of lilac. 

I have someone who wants  a coffee mug in that color but I hope not to have to use stains to get it.

Thanks Wyndham

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John Britt's new book has a couple pages of purples including a bunch of high magnesium ones. "Ashley's Best" is a lilac colour. Don't know how durable they would be as a liner glaze though.

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Take a simple glaze that uses whiting and start substituting dolomite for the whiting. I'm not sure how glossy it's going to be and still give you a good lilac, though. In my experience it's not until it starts to go satin/matte that the lilac color appears. Cooling schedules will certainly affect the glossiness. You should be able to do it with less than 1% cobalt. The one I use only has 0.5% cobalt carb. Magnesium is 0.346 in the unity formula, which is at the high of the limit. I'm not sure what the low end is for lilac.

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I looked at Ashley's best as well as several others in John's mid range book there are seveal that look like they have enough mag carb will test several.

.5% cobalt carb should do it. at lest that's about where I'll start

Thanks for the tip on Tin vs zircopax, maybe some of both.

Wyndham

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