Were you ever able to determine food safety of the Val turquoise glaze you asked about ? I'm searching for one and would like recommendations. I'd of course also check (lemon test) but a referral would help. Thanks!
Sorry about the looong delay in getting to your question. I have Michael Bailey's Glazes Cone 6and believe it to be a good addition to any glaze developers library. It is a little heavier on theory. The materials tend to be more generic like "potash feldspar" instead of specifying a specific branded feldspar. MC6G is a little more readable and likely more popular.
Hi George - I just ordered some of the spanish red oxide from US Pigment, along with other oxides. Steven Hill mentioned the spanish red so i figure i will give it a go. If I don't get good results, I will definitely try the high purity next. He seemed to say to stay away from the others as it makes a big difference. I was trying to compare the Bailey's orange red cone 6 to the Steven Hill Bailey's red. Have you seen the book Bailey's cone 6 glazes? I was thinking of getting it but then I read that a lot of the ingredients are different from what is available in the US. Don't quite understand that comment but wondered if you had seen the book and if you found it helpful. I have MC6G and recently bought the accompanying software, so i have plenty to chew on for now anyway. Thanks again for your help/info. Really appreciate this website.
To actually answer your question, I think there would be little or no difference in substituting the two kaolins for each other. I happened to have both, so I didn't have to substitute. Going back to the Bailey orange red, I don't have the Steven Hill recipe to compare to the Ron Roy version you sent me. US pigments has high purity red iron oxide in case you haven't found it elsewhere. I'm going to buy some and test with all my iron red recipes that never turned out red with my three other red iron oxides.
The glazes that I use are glazes I have been developing over the years. In collage I fired ^10 and I had to bring my glazes down to ^6 so they are still in development. There are three different glazes that I use, base is a Iron sat. then I use a Cobalt sat. with a Ash glazes. I had to change my clay body also and I am not getting the same results, not that they are bad but I now have to begin the process all over.
The four you liked were on Laguna #80 brown clay, my favorite non-white stoneware. The blue is Light Stormy Blue (from Mastering Cone 6 Glazes) layered on top of C Harris Temoku. The other combo was C.H.T. partially layered over Rutile Matte
Low cost flat lapping disc can be used on you potters wheel if you, drill bat pin holes in it, and provide a trickle of water to cool it. At amazon.com, 120 grit for aggressive material removal. Click the image to purchase
Members have had great things to say about John Britt's new book, Mid-Range Glazes. Click the image to buy from Amazon.com
If you just want to spout off, it is best accomplished as a blog posting. If you want to get more guidance and ideas from other members, ask a question as a new discussion topic. In the upper right corner of the lists for both types of posting, you will find an "+Add " button. Clicking it will open an editor where you create your posting. 4/16/2014