Baby_potter Posted August 23, 2017 Report Share Posted August 23, 2017 Hi, I've only been potting for about 10 months, I use the local community studio to pot. There we have a electric kiln that is usually fired at cone 6. So very silly of me I bought two pink glazes but they are cone 3-4. Anyways my question is, if I set the kiln to a cone 4 fire, but use mid temperature m370 clay, will my product turn out alright? At my studio we are not aloud to use low temperature clay. Link to comment Share on other sites More sharing options...
Baby_potter Posted August 23, 2017 Author Report Share Posted August 23, 2017 Also, super sorry if this is in the wrong section, I'm super new to this site Link to comment Share on other sites More sharing options...
Pres Posted August 23, 2017 Report Share Posted August 23, 2017 You have chosen the right place here. I am afraid the bad of this is that your M370 clay is a 5-7 clay body. In the description, they call it semi vitreous at cone 6. This would mean that the glazes you apply, even though vitrified at cone 4, the body of the clay will not be vitrified. Personally, I would see if you could return the glaze, for a replacement. Others may have a better work around, but that is my best advice. best, Pres Link to comment Share on other sites More sharing options...
Min Posted August 24, 2017 Report Share Posted August 24, 2017 Any chance you misread the glaze bottles, are they for cone 03 - 04? and not 3-4? If that's the case then firing to cone 4 could land you with a lot of kiln shelves to grind as the glaze would likley be super fluid by being overfired. I think you probably bought low fire glazes for a midfire clay. http://www.theceramicshop.com/downloads/Ortonconecharttemperatures.pdf Link to comment Share on other sites More sharing options...
Tyler Miller Posted August 24, 2017 Report Share Posted August 24, 2017 I think Min has it right. If the jars are unopened, I'd see if I could get them returned. Link to comment Share on other sites More sharing options...
Baby_potter Posted August 26, 2017 Author Report Share Posted August 26, 2017 Any chance you misread the glaze bottles, are they for cone 03 - 04? and not 3-4? If that's the case then firing to cone 4 could land you with a lot of kiln shelves to grind as the glaze would likley be super fluid by being overfired. I think you probably bought low fire glazes for a midfire clay. http://www.theceramicshop.com/downloads/Ortonconecharttemperatures.pdf Oops your right, they say 03-04 I thought it meant the same though, I'm super new to potting and this was my first time buying my own glaze as the studio im at provides a selection of glaze to use. And yes I did buy low fire glaze for mid temperature clay. Sadly I have already opened the bottles and used them to glaze a few pieces. The glaze itself actually held up really good, just colours were very wrong. Link to comment Share on other sites More sharing options...
S. Dean Posted August 27, 2017 Report Share Posted August 27, 2017 Welcome to the forums. Here's some background information on pyrometric cones that you might find helpful http://jenkenkilns.com/JenKenPDF/orton_cones_firing.pdf Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted August 27, 2017 Report Share Posted August 27, 2017 There's a lot of reasons the colour could be wrong, from overly thin (or thick) application to wrong firing temp. You said the glazes held up pretty well. What temperature/cone did they wind up going to? Link to comment Share on other sites More sharing options...
Babs Posted August 27, 2017 Report Share Posted August 27, 2017 Colour loss of low fired glaze taken to high temp, you said they were pink would be expected.I've found reds esp get lost firing up if not made for the higher temp. Link to comment Share on other sites More sharing options...
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