Hendrixl114

Thank you Madeleine! I don’t know the SG of the glaze, and it was a very quick dip to coat it. Thinning it out and spraying on a thin layer were 2 thing I thought of. thanks for the Amaco information, I will reach out to them and ask their thoughts on the HF clear.

Here is a picture… IMG_0370.pdf

Thank you! I am out of town but will provide pictures when back. I applied 2 coats of the underglaze before carving and bisque firing. You are right, the clear glaze only bubbled and looked like orange peel and was cloudy where the black underglaze was applied, not on the bare clay areas. I will run some more test tiles and try fewer coats of underglaze and spraying clear glaze. do you have any suggestions for a clear glaze that might work better over underglaze that I can buy? I have seen several commercial glazes (laguna I think) that I was thinking of trying. Also, does it matter whether I am using porcelain or stoneware? Is this just a glaze issue or a glaze + clay issue? very much appreciate your feedback!

Hello, I am doing sgraffito on c10 porcelain using Speedball black and Amaco Velvet underglaze and high fire clear glaze my instructor makes. I’m the first student she has had to do this and my first few pieces came out of the (gas) kiln cloudy and bubbly over the black. Does anyone have thoughts on why this might be happening? The clear was applied in one dip so I don’t think was too thick. Oh, and this happened with both bisques and dry greenware. Are there other glazes I could buy/try? Should I thin the clear before applying? Thanks very much for any advice!