Matej Posted January 5, 2016 Report Share Posted January 5, 2016 Hi, my name is Matej and I need some little help of more skilled potters than me ... I want to make a glazed surface on my pots with "irregular and random unexpected" spots ... I try to do something, but I was more and less unsuccessful ... (I attached example from web - it is easy to show what I am talking about ...) Does anyone have any idea where I can get knowledge about this topic ... I will be very grateful for any help ... Matej Link to comment Share on other sites More sharing options...
ChenowethArts Posted January 5, 2016 Report Share Posted January 5, 2016 @Matej, This looks a lot like a Cone 10 glaze that we fire in reduction called "Bird Matte". The mottled look that you see on the outside is pretty typical of the results. On interior and thicker applications, it breaks with a nice pale blue. It would be helpful to know a little more information on your question: What clay body are you using? Are you firing oxidation or reduction? What temperature (cone) are you looking for? Good luck (and welcome to the forum!), -Paul Link to comment Share on other sites More sharing options...
High Bridge Pottery Posted January 5, 2016 Report Share Posted January 5, 2016 I would spot as random or controlled as you want wax resist of some kind. Looks like it is a dark clay body that the glaze has crawled in this wierd spot pattern. Not sure on the recipe they are using to do this, doesn't look like the are painting anything on and the glaze itself is doing this. Link to comment Share on other sites More sharing options...
oldlady Posted January 5, 2016 Report Share Posted January 5, 2016 it appears to me as if it is a reduced cone 10 glaze. if you fire clay and glaze in a kiln that has something actually burning, wood, gas, oil, etc. the metals in the clay can come to the surface and appear just like the "spots" you see in the photo. this kind of firing is not done in an electric kiln and no glaze you make or buy will give you the same results in an electric kiln. the kind of firing is very special and takes a long while to learn since not only do you need to control the temperature but you need to control the amount of oxygen reaching the fire. where did you get the picture? is there a potter's name with the photo? mark, do you agree? Link to comment Share on other sites More sharing options...
oldlady Posted January 5, 2016 Report Share Posted January 5, 2016 matej, if you look carefully at the two larger "spots" near the top, you can see that the darkness in the center appears to have exploded from under the coating of glaze. that is why the surrounding light circle of glaze look thicker around the explosion than on the rest of the surface. it is the classic look of a reduced firing. this is called "reduced" because at some time during the firing, the oxygen is prevented from reaching the flames. the fire needs oxygen so it forces the oxygen out of the clay body resulting in the tiny explosion you see. Link to comment Share on other sites More sharing options...
Matej Posted January 5, 2016 Author Report Share Posted January 5, 2016 Hi everyone! Thank you for the welcome. And thank you for quick reply. Yes of course I did not mentioned ... I am usually using dark clay ... electric kiln (oxidation) cone 10 ... Hmmm, do you think that there is any connection with special glazing "additives" ... for example, tin oxide ... that's the only way to quickly hear about it. I will find the source of this image ... Link to comment Share on other sites More sharing options...
MatthewV Posted January 5, 2016 Report Share Posted January 5, 2016 Electric kilns are very good at regular and consistent results. There are some some ways of achieving irregular and inconsistent in the glaze application process. I will always recommend a dip, pour, or spray to make sure the entire surface has an even coat of glaze on it. But before you do that you can soak a sponge in any nice high-iron glaze and damp just a little on. This is also possible (a little more difficult) after the even coat is applied. Naturally you have to experiment with how much or how little glaze to deposit with the sponge. Link to comment Share on other sites More sharing options...
High Bridge Pottery Posted January 5, 2016 Report Share Posted January 5, 2016 Norikazu Oe seems to be the name of the potter. Can't find his own website to get much info. Norikazu Oe Norikazu Oe began his relationship with ceramics early, training in Seto, one of Japan's foremost pottery centers. After graduating, he continued his training in Tajimi, another of Japan's famous pottery towns before going independent in 1999 . He currently works out of his studio in the hills of Gifu Prefecture producing his distinctive ceramics. https://www.analoguelife.com/en/artists/norikazu-oe Link to comment Share on other sites More sharing options...
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