Search the Community
Showing results for tags 'blistering'.
Notes: all test samples shown are blended at 73% clay, 12% C&C ball clay, and 15% mahavir potash as a baseline: fired in oxidation. Red body is a generic term used to describe iron bearing clays that have a red hue. There are other iron bearing clays that can present as green, grey, and black; these are exceptions, not the rule for commercial bodies. The three iron sources found in natural clay are hematite, magnetite, and iron disulfide. Iron disulfide is the common iron source in the USA and Canada; however hematite and magnetite are included because they are sourced i
I have made my own black stains with the same bodies of porcelain I’m using ( Audrey Blackman & Parien )They fire up to 1240 degs ( one fire ) My problem is the stained surface ALL have blisters Any suggestions on how I can resolve this issue ? Is there mayb something else I should be adding aside from porcelain body stain and water ( which I then pass through a mesh sieve) Commercial stains seem fine Would appreciate input Kind regards Nicky
I am new to glazing. I purchased a bucket of clear glaze. It was advertised as cone 6. I fired a few pieces (I know - should have done a test fire) and got blistering all over the pieces - some popped. In looking closer at the fine print, it is a cone 06 glaze. Can I retire and save these pieces? Or any help anyone can give. I know I should be chastised. Be easy on me. Thanks!
I've been using this glaze for many years but have recently been encoutering some pretty bad blistering and some minor pinholing and I"m a bit mystified as to it's cure. The glaze: 53 Frit 3110 25 Spodumine 2.8 Strontium Carbonate 3 Silica 13 Gerstley Borate .6 Whiting .1 Magnesium Carbonate 2.5 Zinc Oxide 5 Rutile .5 Cobalt Carbonate 1.5 Black Copper oxide. At first I thought maybe it was getting old and since it contains soluable ingredients should be remade but it still blistered. It is a cone 6 glaze so I took it to cone 7. Blistered. Held it for a half hour at con