clay lover Posted April 17, 2014 Report Share Posted April 17, 2014 I need to make anew bucket of a glaze I have used with good results that used soda feldspar . Since I have 0 experience in reformulating glazes, which feldspar do you recommend I start testing with that will make the fewest changes? Link to comment Share on other sites More sharing options...
Min Posted April 17, 2014 Report Share Posted April 17, 2014 In my recipes that used K4 I am now using Minspar. There is a bit more silica in Minspar, the rest of the chemistry is fairly close. If you don't use a glaze program then myself or someone else here could do the conversion for you if you post your recipe. Link to comment Share on other sites More sharing options...
neilestrick Posted April 17, 2014 Report Share Posted April 17, 2014 Post the recipe and we'll se what we can do. Link to comment Share on other sites More sharing options...
clay lover Posted April 17, 2014 Author Report Share Posted April 17, 2014 My materials supplier says use minspar 200, that it is the same thing ??? Thanks, guys! Recipe is as follows. Sea foam Green Soda feldspar 41 EPK 5 Silica 27 Whiting 15 Zinc Oxide 12 Add; titanium 5 copper carb 5 Link to comment Share on other sites More sharing options...
Min Posted April 17, 2014 Report Share Posted April 17, 2014 You could probably just sub the minspar 1:1 for the soda spar. Was it F4 you were using before? If so and you want to get picky with a very close match the new recipe would be: Minspar 200 41.6 Epk 6.1 Silica 24.9 Whiting 15.2 Zinc 12.2 total: 100 titanium 5 copper carb 5 When I just use soda feldspar the rebalanced recipe would be; Minspar 41.2 Epk 6 Silica 25.6 Whiting 15.1 Zinc 12.1 total: 100 titanium 5 copper carb 5 (Glaze calc done with Insight) Link to comment Share on other sites More sharing options...
clay lover Posted April 18, 2014 Author Report Share Posted April 18, 2014 Thank you! now I can get busy mixing this glaze. Link to comment Share on other sites More sharing options...
Chris Throws Pots Posted April 20, 2014 Report Share Posted April 20, 2014 I have used Minspar 200 in substitution for F4 in several ^6 ox glazes with success. I have seen no differences in the results between pieces glazed with the original or adjusted recipes. Link to comment Share on other sites More sharing options...
Deena Posted July 27, 2020 Report Share Posted July 27, 2020 I'm looking to buy minspar 200, I'm finding minspar 250, (at Aardvark), will the 250 work the same as the 200? Link to comment Share on other sites More sharing options...
neilestrick Posted July 27, 2020 Report Share Posted July 27, 2020 They're nearly identical. Should work fine. Link to comment Share on other sites More sharing options...
Bill Kielb Posted July 27, 2020 Report Share Posted July 27, 2020 On 4/17/2014 at 9:00 AM, clay lover said: I need to make anew bucket of a glaze I have used with good results that used soda feldspar . Since I have 0 experience in reformulating glazes, which feldspar do you recommend I start testing with that will make the fewest changes? Custer would be common, neph sy would be common with sodium and has very low si:al I believe, so easy to design low and midfire recipes with. Link to comment Share on other sites More sharing options...
Deena Posted July 27, 2020 Report Share Posted July 27, 2020 Thank you Neilestrict, Link to comment Share on other sites More sharing options...
Deena Posted August 3, 2020 Report Share Posted August 3, 2020 Can anyone recommend a small gas kiln brand. I have seen the olympic gas/raku kiln at clayking at around $1400. 3+ cu ft. I'm adding this to my studio that I use skutt electric, but would like to do some cone 10 gas and raku as well. I will appreciate any suggestion or ideas that anyone has before making a purchase. Thank You so much in advance. The Olympic is an updraft, couldn't find a downdraft in that size range, any ideas?? Link to comment Share on other sites More sharing options...
curt Posted August 7, 2020 Report Share Posted August 7, 2020 Yes what country are you in? Link to comment Share on other sites More sharing options...
neilestrick Posted August 7, 2020 Report Share Posted August 7, 2020 @Deena The round Olympic updraft kilns are problematic for doing cone 10 reduction. If you search 'conversion' kilns here on the forum, you'll see all the issues people have with that type of kiln, which is just an electric kiln body with burners underneath. People try doing this with old kiln bodies all the time, and realize that they don't fire evenly and often struggle to reach temperature. There are a couple of designs that use an internal downdraft flue that works well, though. Nobody sells one like that, you'll have to do the work yourself. Check out THIS BLOG. Link to comment Share on other sites More sharing options...
Sorcery Posted August 7, 2020 Report Share Posted August 7, 2020 On 8/3/2020 at 10:50 AM, Deena said: ideas I built my conversion with the help of that blog. The design is friggin fantastic, works amazingly well. Consider keeping a seperate junkier kiln for Raku. I don't even like opening the lid on my conversion when it's cooled, opening it hot, would cause more shifting and cracking of the internal flue than I could stand thinking about. Plus it's kinda dangerous. Check OfferUp for used bodies. I have $50 into the body, $70 into the flue shelf, and about a thousand on shelves and furniture. Borrowed burner probly around $100. Sorce Link to comment Share on other sites More sharing options...
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