synj00 Posted August 27, 2014 Report Share Posted August 27, 2014 I want to make a thicker iron oxide for brushing onto my pieces. First off its a complete mess when mixed with water. Second all the iron particles end up at the bottom unless you are continually stirring which still makes for an inconsistent tone and tint of the application. What is the general rule for getting suspension of particles in a water based stain / glaze / etc... a frit? I'm firing at cone 6 always and cone 04 for bisque. The application will be on bisqueware not greenware. Link to comment Share on other sites More sharing options...
TJR Posted August 27, 2014 Report Share Posted August 27, 2014 Synn; You don't want to be using fritts. Fritts are basically ground glass and are heavy. You want to be adding clay to your mix for suspension. I add Albany slip-one teaspoon to about a tablespoon of red Iron Oxide. Not precise-just spoon in, mix up and brush. Some potters use a mortar and pestle to get a fine grind, but I can't be bothered. Also try a bit of black iron oxide to taste. Check out my gallery for brush work. TJR. The fifth image is unfired iron. T. Link to comment Share on other sites More sharing options...
Biglou13 Posted August 27, 2014 Report Share Posted August 27, 2014 Iron is heavy Not a suggestion but questions... What about flocs, Epsom salts, or bentonite? My applications of rio just tended to get eaten up by glaze or clay, leaving faint brown line nothing like what you have in picture which. Was my original intent. I did make a signature rio mix with 3134 and rio, but that also settled like mad. After shaking and opening container it looked like scene from dexter. (Good pot, by the way!) Link to comment Share on other sites More sharing options...
synj00 Posted August 27, 2014 Author Report Share Posted August 27, 2014 Thanks Biglou13 and thanks for the suggestion of clay. The black I got was from letting the iron settle to the bottom of my "watery suspension" pouring off the clear and applying the thick sludge of iron from the bottom. This is the reason for the original question. It leaves the application very inconsistent and never repeatable (sometimes good but...) I'll try the clay slurry idea and heck, maybe even in a ketchup squeeze bottle it might be interesting to keep on hand. Can always thin it too. Link to comment Share on other sites More sharing options...
jrgpots Posted August 28, 2014 Report Share Posted August 28, 2014 Since oxide washes are mostly water and the water is what spreads the wash around, you can thicken the water with Xanthum gum. 1-3 tsp of gum to 16 ounces of fluid, followed by shaking vigorously will thicken the water soln and suspend the RIO. The xanthum gum burns out in the firing. I have used it for a while. I don't know if anyone else has done this before. But I found it works for me. Its biggest drwback is that it is an organic material and will go bad. So make up small batches you will use quickly. Jed Link to comment Share on other sites More sharing options...
Guest JBaymore Posted August 31, 2014 Report Share Posted August 31, 2014 For cone 10 and up, I use a mix of RIO, a tiny bit of redart (particles for helping suspension), small amount of g-200 spar (early fusion), and use some glycerine with the water to "thicken" the brushing consistency, and sometimes a touch of Elmer's Glue to keep it from smudging after it dries (if painting on top of glazes). Propylene glycol also can be used to make it brush better (not ethylene... toxic). best, ................john Link to comment Share on other sites More sharing options...
Chantay Posted September 2, 2014 Report Share Posted September 2, 2014 I have been experimenting with brushing on oxides. Sometimes I add a pinch of ball clay. It's ok. Better is using some slip I keep on hand all the time. Just a small amount then adjust for flow with water. I use to paint. I have acrylic medium on hand. It's like acrylic paint but dries clear. This works well esp. For fine line work. You add water to it to dilute. Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted September 2, 2014 Report Share Posted September 2, 2014 John, can you give some relative amounts of those ingredients? And also, does this mix dissolve into the glaze at all if applied underneath? I've been working with a mix of oxides and epk, and it's got some promise, but this tends to bleed if used under a glaze, and runs like a tap if placed over glaze. Edited: never mind. I realized today I should go off what's there already:) Link to comment Share on other sites More sharing options...
Mermoose Posted September 10, 2014 Report Share Posted September 10, 2014 TJR, if you see this post I would like to look at your brush work. And thanks for the tip about adding the Albany slip. I am new here so I don't know how to reach you or view your gallery. Link to comment Share on other sites More sharing options...
perkolator Posted September 10, 2014 Report Share Posted September 10, 2014 albany works good for the RIO wash and dark pigments, but for other colors i'd suggest something like bentonite, kaolin or ball clay. a little flux will help fuse it as well. i usually use gerstley borate or sometimes a frit (if there's enough clay content). almost always use CMC gum solution to help suspend it and give it the "candy coating" once dry for anti-smudge properties. i've never tried the glycerine additives, but suppose they would work well since they are thick. karo syrup is another one i've seen people use. epsom salts does work too. Ratios: usually an underglaze is 1/3 color (stain), 1/3 clay, 1/3 flux....for something like RIO/marking/signature solution i'd go with around 3 RIO, 2 clay, 1 flux. Link to comment Share on other sites More sharing options...
Babs Posted September 11, 2014 Report Share Posted September 11, 2014 TJR, if you see this post I would like to look at your brush work. And thanks for the tip about adding the Albany slip. I am new here so I don't know how to reach you or view your gallery. Click on his avatar, then once there click on gallery and you'll see some of his work. Link to comment Share on other sites More sharing options...
TJR Posted September 11, 2014 Report Share Posted September 11, 2014 TJR, if you see this post I would like to look at your brush work. And thanks for the tip about adding the Albany slip. I am new here so I don't know how to reach you or view your gallery. Click on my picture of the plate. Then on the left side you will see a list of options. Click on Gallery. If you don't get there, let me know. TJR. Link to comment Share on other sites More sharing options...
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