Biglou13 Posted July 10, 2013 Report Share Posted July 10, 2013 i have the opportunity to get some pieces wood fired in september. i have made a few pieces with highwater helios. so i was i made a few (test) pieces with laugana 900 with added grit then at leather hard or softer coated with porcelain slip made with helios and water. as a flashing slip its a bit of a cheat but its what i have on hand right now. i also have some higwater moon white trimmings soaking to be a flashing slip am i way out of line with my thinking here? Link to comment Share on other sites More sharing options...
OffCenter Posted July 10, 2013 Report Share Posted July 10, 2013 I hope you're not puting that stuff on a lot of pots. Test first. You may have a great flashing slip and all will be wonderful but I doubt it. They usually do more harm than good unless you are familiar with them and if it's a good wood firing and a good clay you don't need a flashing slip. Also, put some neph sy in your concoctions. Here are a few I have but never use: Basic Flashing Slip Neph Sy ... 30 Kaolin ... 70 Johnston Flashing Slip Avery or other Kaolin ... 50 Neph Sy ... 50 Flashing Slip #3 Neph Sy ... 35.4 Helmar Kaolin ... 39.8 Alumina Hydrate ... 4.4 Titanium Dioxide ... 2.7 Soda Ash ... 17.7 Helmar Flashing Slip Helmar Kaolin ... 50 EPK ... 20 Neph Sy ... 20 Silica ... 10 Jim Link to comment Share on other sites More sharing options...
Biglou13 Posted July 10, 2013 Author Report Share Posted July 10, 2013 i only did one piece..... thanks, jim .... the first 2 are easy enough with the rarity of having access to wood fire it could months between tests..... (patience .......patience....) im also thinking the clay and the slip will have different shrinkage..... ill save the slips for hakeme and other electric musings Link to comment Share on other sites More sharing options...
neilestrick Posted July 10, 2013 Report Share Posted July 10, 2013 Most porcelains will just flux out shiny white if they get any decent amount of vapor and/or ash. They're way too high in silica. A.R.T.'s porcelain is an exception, because it is not pure white. Goes slightly gray in reduction, but has just enough impurities to flash well in wood. If you don't have the ingredients in the list above, a simple slip of 80% EPK 20% Nephy Sye can do a decent job. Link to comment Share on other sites More sharing options...
Mark C. Posted July 10, 2013 Report Share Posted July 10, 2013 I have had great luck with Helmer epk for flashing in wood fires Heres a jug from a few years ago with helmer sprayed on. Mark Link to comment Share on other sites More sharing options...
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