Liam V Posted March 17, 2020 Report Share Posted March 17, 2020 I've been testing out this midfire clay, but whenever I fire it to cone 6, it turns out a very different colour. It's suppose to look like the dark brown cup on the left side of the image but instead turns out a much lighter colour. I've been told that it could be the firing schedule and that higher temperatures burn out the colour. Does anyone have any experience with this and could offer me some advice? I'm currently using a default program on the vc6-bartlett with an olympic kiln. Link to comment Share on other sites More sharing options...
Min Posted March 17, 2020 Report Share Posted March 17, 2020 Reduction versus oxidation firing will make a difference to fired clay colour. If the sample was fired in an electric kiln (oxidation) and you are firing in oxidation and reaching the same maturation cone 6 then the schedule shouldn't have anything to do with the final colour of the claybody. What is the name of the claybody? Link to comment Share on other sites More sharing options...
Hulk Posted March 17, 2020 Report Share Posted March 17, 2020 The "YG" matures cone 8-10; if that's it, likely not fully vitrified at cone 6 Sandstone When fired in Oxidation. Brown When fired in Reduction. Link to comment Share on other sites More sharing options...
Liam V Posted March 18, 2020 Author Report Share Posted March 18, 2020 18 hours ago, Min said: Reduction versus oxidation firing will make a difference to fired clay colour. If the sample was fired in an electric kiln (oxidation) and you are firing in oxidation and reaching the same maturation cone 6 then the schedule shouldn't have anything to do with the final colour of the claybody. What is the name of the claybody? It's called - Clayworks Clay : Mid Fire Chris Dark Speckle 30# I was under the impression that I could achieve that dark brown in oxidation, as the storeperson I was discussing it with earlier in the year knew I use an electric kiln. I also believe it only vitrifies at cone 6. Link to comment Share on other sites More sharing options...
Hulk Posted March 18, 2020 Report Share Posted March 18, 2020 Stock oxy image, below; looks a bit more yellow in your image Liam - perhaps lighting? Likely that would look toasty brown when fired reduction... Link to comment Share on other sites More sharing options...
Min Posted March 18, 2020 Report Share Posted March 18, 2020 @Hulk, I just looked up the clay and that stock image comes up for both the Clayworks Chris's Dark Speckle Midfire and the Light version of it. Maybe it's just a mixup of labels on the bags of clay? It does look like a midfire claybody. Link to comment Share on other sites More sharing options...
Liam V Posted March 19, 2020 Author Report Share Posted March 19, 2020 Yes, I have the light speckle clay as well which looks like that disc of clay. It's the same as the clay on the right side of the image I posted. Link to comment Share on other sites More sharing options...
Instagramphotosandvideos.thumb.jpg.ccb9547bec28178cd00342bf92e39136.jpg)
Recommended Posts
Archived
This topic is now archived and is closed to further replies.