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Showing results for tags 'manganese'.
I'm having a hard time finding a speckled clay without manganese. Anyone have any suggestions? I've searched the SDS sheets of Standard Ceramic, Laguna, Minnesota clay co and Amaco. The best I can tell is that Amaco may not use it in their 480M and 48M with grog but their SDS sheets don't seem to list all the ingredients so I'm skeptical. I can't tell from this list (below) what would be causing the blooming speckles? It also seems like they are only listing the top 5 ingredients by weight. Hydrated Aluminium Silicate 10-30% HYDROUS ALUMINIUM SILICATE 10-30% Fireclay 10-30% Hydrous Aluminium Silicate 10-30% silica 5-10% Anyone have any recommendations for a safer speckled clay? Or does that not exist? AMACO 480M STONEWARE W-O GROG - SDS4882.pdf
Hi, I have been handbuilding with clay for a couple of years now. I bought a slab roller which is wonderful! Now I'm getting more into the science of glazing. Self taught, (with a well known potter to ask advice from). I am selling well and with each new piece I learn so much. The owner gave me a Laguna #70 to work with and it comes out a deep brown. It has manganese in it and the glazes respond in unusual ways. I have a new piece to glaze which on the underside I practiced burnishing and lots of texture on the inside. My desire is to learn how to work with the beauty of the inherent qualities of the Clay body, and so will leave the bottom burnished and am considering Amaco celedon snow C-10 for the inside and some color for the big tooth aspen leaf. I just received a book on glazing (Amazing Glaze, Gabriel Kline), with recipes and hope to one day make my own glazes. For now I am looking for tips and ideas on working with these clay bodies that have manganese (#70) and also magnesium flecks (#50). I like the organic textural qualities of the flecks, but glazes react much differently than the #65 white stoneware that I've been using. As well, I have no control over the firing process as my work is included with others and fired as the studio owner determines. I do know she is firing to come 5-6 with a hold at the end up to 10 sometimes. I am including a couple of pictures (the textured platter is in leather hard stage). The glazed picture is with a Mayco Norse Blue and the leaves are ungerglazes. As you can see the finish is off, but someone bought it!) I have a lot to learn still, but I absolutely love working with the clay. I am 61 and have been an artist of many mediums, paint, wool felting, gem and mineral polishing and wrapping.... now that pottery has grabbed me, it satisfies all my artistic loves... and the science of glazing is SO stimulating!
Cheers! I thank you very much if anyone can consult. I don't know why in the black or red ceramic paste (which I have high temperature), my faldespatico base enamels do not cover this clay. The enamels come out with bubbles.., although in white clay they work well for me. I understand that black clays contain ox iron and manganese..