MariaHowardCeramics Posted June 29, 2023 Report Share Posted June 29, 2023 Hi there, I wonder if anyone can help explain why one of my go-to glazes is acting completely differently to past results. I am using stoneware. The glaze is Turner's white with 5% black iron oxide added and mixed in. In the past this has created a lovely deep brown which I have used everywhere. However I made a new batch up last week and fired it (slow glaze, cone 6 on an L&L kiln) and it came out a colour that looks like buttercream. At first I thought it might be because I added a soak to the firing to make sure the bottom layer got fully glazed but I did another firing this week with no soak and the same thing happened, albeit with a smoother, nicer effect than the first time. I am going to buy some cones to check the temp for sure but it's still very weird... I am also using a clay that looks more pink than buff when bisqued – could this have an effect? Thanks! Maria Quote Link to comment Share on other sites More sharing options...
Min Posted June 29, 2023 Report Share Posted June 29, 2023 Hi Maria and welcome to the forum! Is this the Turner's White recipe you used? If it is did you include the zirconium opacifier both in the past and with this current batch? Rae Reich, Babs and PeterH 3 Quote Link to comment Share on other sites More sharing options...
PeterH Posted June 29, 2023 Report Share Posted June 29, 2023 35 minutes ago, Min said: Hi Maria and welcome to the forum! Is this the Turner's White recipe you used? If it is did you include the zirconium opacifier both in the past and with this current batch? Article on Turner's white with some examplesIt Slices, It Dices! Some Simple Glaze Tests Reveal a Ceramic Glaze That Can Do it All (well, almost)https://ceramicartsnetwork.org/daily/article/It-Slices-It-Dices-Some-Simple-Glaze-Tests-Reveal-a-Ceramic-Glaze-That-Can-Do-it-All-well-almost .. I notice it says under Colour Development The second part of our project was to use Turner's White as a base, but just exclude the Zircopax (an opacifier). Babs, Rae Reich and Min 3 Quote Link to comment Share on other sites More sharing options...
Babs Posted July 2, 2023 Report Share Posted July 2, 2023 A photo of usual and new would give an idea as to what's hapening. Double batch and no increase to iron content? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.