Wyndham Posted February 18, 2017 Report Share Posted February 18, 2017 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 Link to comment Share on other sites More sharing options...
Dick White Posted February 18, 2017 Report Share Posted February 18, 2017 Find a recipe for Randy's Red (also known as Readers Digest Red) and replace the iron colorant with 1.2% cobalt. Link to comment Share on other sites More sharing options...
Wyndham Posted February 18, 2017 Author Report Share Posted February 18, 2017 Thanks, I have that glaze ,will try that next fining. What do you think about some zirocpax to increase opacity make it creamier Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted February 18, 2017 Report Share Posted February 18, 2017 Tin will be more conducive to a good lilac than zircopax. Link to comment Share on other sites More sharing options...
Min Posted February 18, 2017 Report Share Posted February 18, 2017 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. Link to comment Share on other sites More sharing options...
neilestrick Posted February 18, 2017 Report Share Posted February 18, 2017 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. Link to comment Share on other sites More sharing options...
Wyndham Posted February 18, 2017 Author Report Share Posted February 18, 2017 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 Link to comment Share on other sites More sharing options...
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