clay lover Posted October 19, 2014 Report Share Posted October 19, 2014 Is there an easy way to make dipping glazes easier to brush on? Friend needs to add a band of glaze to the edge of plates and only has glazes mixed to dip. How much glycerin should she add? Or is there something else she could add? Link to comment Share on other sites More sharing options...
Babs Posted October 20, 2014 Report Share Posted October 20, 2014 Brushing mediumI use with some coloured slip on unfired glase is CMC gum, poss ok to enhance the painterly effect of brushing glaze. Worth a try. Link to comment Share on other sites More sharing options...
neilestrick Posted October 20, 2014 Report Share Posted October 20, 2014 First make a gum solution with 2 tablespoons CMC gum to a gallon of hot water. If you have some, also add 1 tablespoon Vee-Gum-T. Let it sit overnight, then blend till smooth. When making the glaze, substitute up to 1/3 of the water with gum solution. To alter an existing glaze, you'll need make the gum solution really thick before adding to the glaze, so increase the amounts of CMC and VGT. Link to comment Share on other sites More sharing options...
clay lover Posted October 20, 2014 Author Report Share Posted October 20, 2014 She would like to end up with about a pint of the altered glaze. The glaze is already mixed. Link to comment Share on other sites More sharing options...
Babs Posted October 20, 2014 Report Share Posted October 20, 2014 The CMC soln. will keep so if you don't want to alter Neil's recipe just mix it up with a lot less water, decant some of hte glaze in question, add some of the gunk , stir madly, and test the ease of application , alter as needed. Link to comment Share on other sites More sharing options...
neilestrick Posted October 20, 2014 Report Share Posted October 20, 2014 Forgot to add: To the gallon of CMC/VGT solution also add a 1/4 teaspoon copper carbonate as a preservative. Otherwise a lot of the gum will get eaten up by bacteria. Link to comment Share on other sites More sharing options...
Babs Posted October 21, 2014 Report Share Posted October 21, 2014 RIght only ever make small quantities so haven't experienced the bacterial growth. Wall paper paste,is it still around?, do the same as CMC etc? Link to comment Share on other sites More sharing options...
neilestrick Posted October 21, 2014 Report Share Posted October 21, 2014 RIght only ever make small quantities so haven't experienced the bacterial growth. Wall paper paste,is it still around?, do the same as CMC etc? Not sure about the wall paper past. The gum will degrade even once it's in a glaze. Sometimes this happens within just a few days- you'll notice it being more watery than before. Commercial glazes have a biocide in them to preserve them. Link to comment Share on other sites More sharing options...
Chilly Posted October 21, 2014 Report Share Posted October 21, 2014 I've used wallpaper paste to try to stop glazes settling out. Sometimes works, sometimes doesn't. Worth a try as it's easier to buy locally than CMC. Link to comment Share on other sites More sharing options...
ayjay Posted October 21, 2014 Report Share Posted October 21, 2014 I've used wallpaper paste to try to stop glazes settling out. Sometimes works, sometimes doesn't. Worth a try as it's easier to buy locally than CMC. Epsom Salts is what you need to stop your glazes settling. http://www.glazefixer.com/postreview.aspx?PostID=50&PostTitle=What%20are%20Epsom%20Salts For CMC look in your nearest supermarket - often sold as *Tylose* in the home-baking section, (it's used in cake icing). Link to comment Share on other sites More sharing options...
Babs Posted October 21, 2014 Report Share Posted October 21, 2014 RIght only ever make small quantities so haven't experienced the bacterial growth. Wall paper paste,is it still around?, do the same as CMC etc? Not sure about the wall paper past. The gum will degrade even once it's in a glaze. Sometimes this happens within just a few days- you'll notice it being more watery than before. Commercial glazes have a biocide in them to preserve them. And copper carb as opposed to bleach? Why is this? Link to comment Share on other sites More sharing options...
neilestrick Posted October 22, 2014 Report Share Posted October 22, 2014 I have not found bleach to be a good long term preservative. I think that if it was effective, we would see it used commercially since it is way cheaper and safer to store and use than the biocides that are used. Link to comment Share on other sites More sharing options...
perkolator Posted October 22, 2014 Report Share Posted October 22, 2014 does the copper content not effect your glazes? (more specifically whites and clears) i know it's a tiny amount in relation to the gallon of water, but still... i keep a jug of thick CMC solution (150g CMC/1gal H20) and gas kiln wash with CMC and macaloid in it - since both don't tend to be used very quickly they end up getting funky depending on the weather/time of year. i usually just splash some bleach in the kiln wash, and yes it is not a good long-term fix. the CMC solution i just leave as-is, it would be nice to be able to cut down on the funk that develops in both buckets. Link to comment Share on other sites More sharing options...
Babs Posted October 23, 2014 Report Share Posted October 23, 2014 Initially I cooked the CMC soln to thicken it, guess it just speeded up the process, eleiminatingthe slake time. Link to comment Share on other sites More sharing options...
neilestrick Posted October 24, 2014 Report Share Posted October 24, 2014 The copper will not show up in your glaze. 1/4 teaspoon to a gallon of CMC mix, which then only becomes 30% of the water in the glaze. It's a minuscule amount of copper. Link to comment Share on other sites More sharing options...
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