crrclay Posted February 3, 2018 Report Share Posted February 3, 2018 I forgot to mark the identifying numbers on some test tiles. Is there a way to mark the bisque ware before glazing? Link to comment Share on other sites More sharing options...
GEP Posted February 3, 2018 Report Share Posted February 3, 2018 [ I’m moving this topic to the Studio Operations section. ] Yes, you can label the bisque test tiles with underglaze or an underglaze pencil. Link to comment Share on other sites More sharing options...
Magnolia Mud Research Posted February 3, 2018 Report Share Posted February 3, 2018 I use a red iron/manganese oxide ink on either green ware or bisque ware. fires black I make test tiles in bulk, bisque, and mark them with the ink when they are used. Recipe: two scoops of red iron oxide two scoop of manganese dioxide a few drops of rubbing alcohol to wet the powder mix well with coffee stirrer. a water to slurry the powder to ink I use a wooden coffee stirrer for a scoop and make about three spoons full of ink in a small bottle, usually lasts for more than a year. add water as need when the slurry dries. Apply with fine watercolor brush. LT Link to comment Share on other sites More sharing options...
Min Posted February 3, 2018 Report Share Posted February 3, 2018 Dixon high heat china pencils work too. They are a bit waxy so if you get a bit of glaze on them you can sponge off the glaze without wiping out the pencil writing. They are super inexpensive, like under a dollar each. I've been using them for years for test tiles fired up to cone 7, don't know if they would go higher but since it looks like iron pigment in them I'm assuming they do. Link to comment Share on other sites More sharing options...
Magnolia Mud Research Posted February 3, 2018 Report Share Posted February 3, 2018 Min, I have tried them at cone 10 and they do work just fine. As do the iron pigmented school wax crayons. LT Link to comment Share on other sites More sharing options...
Chilly Posted February 4, 2018 Report Share Posted February 4, 2018 I used a dental pick and scratched numbers into the ones I forgot to do. I used Roman Numerals as they are all straight lines, much easier than 2,3,5,6,8,9,0 etc Link to comment Share on other sites More sharing options...
Pres Posted February 4, 2018 Report Share Posted February 4, 2018 I have used the old number stamps with the rotating bands for a 4 digit number. It works well with the stamp pads like Minnesota clay or ART used to make. I think they are still available. I am not a big fan of manganese oxide, and would rather use plain iron, even though I have several glaze recipes that call for small percentages of manganese. best, Pres Link to comment Share on other sites More sharing options...
graybeard Posted February 5, 2018 Report Share Posted February 5, 2018 I use a under glaze pencil. graybeard Link to comment Share on other sites More sharing options...
Marcia Selsor Posted February 6, 2018 Report Share Posted February 6, 2018 I use underglaze pencils. I have many types from over the years including old Drakenfeld, Amaco, and others. They are made for bisque surfaces. Marcia Link to comment Share on other sites More sharing options...
terrim8 Posted February 8, 2018 Report Share Posted February 8, 2018 On 2/3/2018 at 1:35 PM, Min said: Dixon high heat china pencils work too. They are a bit waxy so if you get a bit of glaze on them you can sponge off the glaze without wiping out the pencil writing. They are super inexpensive, like under a dollar each. I've been using them for years for test tiles fired up to cone 7, don't know if they would go higher but since it looks like iron pigment in them I'm assuming they do. I used to use those red ones to label core samples! I didn't know there was a high heat option- thanks! Looks like brown is the only one for high heat though. Link to comment Share on other sites More sharing options...
crrclay Posted April 1, 2018 Author Report Share Posted April 1, 2018 Thanks all! I used an underglaze pencil... worked very well! Link to comment Share on other sites More sharing options...
oldlady Posted April 1, 2018 Report Share Posted April 1, 2018 thanks for the update! Link to comment Share on other sites More sharing options...
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