Medeli Alpaca Posted July 5, 2019 Report Share Posted July 5, 2019 Hi! I'm trying to reformulate Arbuckle's majolica recipe for cone 05, since I can't find frit 3124 in my country. I was hoping someone could help me or give some advice on how to reformulate the recipe with frit 3134. I'm aware that the main difference is the alumina content and that I can source it from the EPK but I have no idea of how much I should add and if I should also modify the silica content... or decrease the frit. Any advice is welcome, thank's in advance! Link to comment Share on other sites More sharing options...
liambesaw Posted July 5, 2019 Report Share Posted July 5, 2019 Do you have access to glaze software? If so it should be a quick sub. I wouldn't recommend a straight substitution of 3134 though since it makes up the majority of the recipe. Link to comment Share on other sites More sharing options...
Medeli Alpaca Posted July 5, 2019 Author Report Share Posted July 5, 2019 12 minutes ago, liambesaw said: Do you have access to glaze software? If so it should be a quick sub. I wouldn't recommend a straight substitution of 3134 though since it makes up the majority of the recipe. Yesterday I downloaded Glazemaster but came here after realizing it wasn't that easy to use it... Do you have any suggestion about the substitution?, there's not 3124 around here and I'm getting out of ideas... Thanks for the answer! Link to comment Share on other sites More sharing options...
liambesaw Posted July 5, 2019 Report Share Posted July 5, 2019 I fiddled around with it in my glaze software and got fairly close-ish, by no means do I pretend to be a glaze chemist but here's a screenshot Original on the left. Subbed on the right Link to comment Share on other sites More sharing options...
Medeli Alpaca Posted July 5, 2019 Author Report Share Posted July 5, 2019 It's actually very close! I'm going to do some trials and I hope it works, thank you! Link to comment Share on other sites More sharing options...
liambesaw Posted July 5, 2019 Report Share Posted July 5, 2019 Probably won't need Epsom salts with that much additional clay Link to comment Share on other sites More sharing options...
Medeli Alpaca Posted July 5, 2019 Author Report Share Posted July 5, 2019 2 minutes ago, liambesaw said: Probably won't need Epsom salts with that much additional clay You are right! I'm going to try without it. Thanks again! Link to comment Share on other sites More sharing options...
Min Posted July 6, 2019 Report Share Posted July 6, 2019 One more version of it, Link to comment Share on other sites More sharing options...
Medeli Alpaca Posted July 7, 2019 Author Report Share Posted July 7, 2019 Min, Liam, would you also get rid of the bentonite content -having in mind the kaolin increase- in both recipes? I began to think about it with the modification of the Epson salts... Link to comment Share on other sites More sharing options...
Min Posted July 7, 2019 Report Share Posted July 7, 2019 1 hour ago, Medeli Alpaca said: I began to think about it with the modification of the Epson salts... Going back to the epsom salts part of the glaze, I don't know how much you've worked with majolica glazes etc so apologies if you already know this... The epsom salts are to help have a more even laying down of the dipped glaze on the pot, especially on rims and edges. Since majolica glazes are stiff non fluid glazes any flaws in the glaze application will likely show up after the glaze firing. There's nothing nasty in this glaze so go ahead and mix it up with the correct amount of water, measure the specific gravity, then stir it with your hand then pull your hand out and see how the glaze flows off your skin/knuckles/wrinkles. (if you don't want to use your bare hand then use a stir stick or wear a glove) If you see your skin through the glaze after your hand as dripped for a minute then this same sheeting will happen when you glaze a pot. The glaze will thin out over high spots (rims and edges). To get the glaze to stay even in it's application epsom salts are sometimes needed to prevent this sheeting. Water used to make the glaze can make a difference in glaze deflocculating or not. Try mix up a batch and see what it does. If it sheets off your hand then mix up a saturated solution of hot water and epsom salts. Take just a litre of glaze and add a small amount, like a couple mls of the epsom salts solution to the litre of glaze and mix it up then see how it drips/sheets off your hand. Don't add too much, just enough to get the glaze to cover your hand evenly without thin areas. Might be fine without it but if it is necessary to flocculate the glaze the epsom salts solution will work well. With approx 15% epk in the glaze you probably don't need the bentonite. Link to comment Share on other sites More sharing options...
Magnolia Mud Research Posted July 7, 2019 Report Share Posted July 7, 2019 A comment on the use of Epsom salts (and deflocculants): adding little bit may do some good, but a whole lot added will definitely make a VERY BIG MESS! LT Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted July 8, 2019 Report Share Posted July 8, 2019 This ^^^. Add a teaspoon at a time and stir thoroughly in between! Link to comment Share on other sites More sharing options...
MFP Posted August 5, 2019 Report Share Posted August 5, 2019 Min, How does this software work? Link to comment Share on other sites More sharing options...
Min Posted August 5, 2019 Report Share Posted August 5, 2019 2 minutes ago, MFP said: Min, How does this software work? I'm going to start a new thread for QNA for glaze calc software. Link to comment Share on other sites More sharing options...
MFP Posted August 5, 2019 Report Share Posted August 5, 2019 OK Link to comment Share on other sites More sharing options...
liambesaw Posted August 5, 2019 Report Share Posted August 5, 2019 2 minutes ago, MFP said: OK 30 minutes ago, MFP said: Min, How does this software work? It's not TOO too complicated, but here is a great resource for using insight-live: https://www.youtube.com/channel/UCSeSn-DemxWEXUbJDltl4jQ Link to comment Share on other sites More sharing options...
MFP Posted August 5, 2019 Report Share Posted August 5, 2019 Bill sent me a you tube video link about doing it by hand. I think I need to start there to really understand how it works. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.