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Showing results for tags 'glaze issue'.
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I'm looking for help with a recent glaze issue. I've been using the same clay and white glaze for a couple of years. Now, all of a sudden, I'm getting tiny black specks in the glaze, and it's ruining the clean look I'm trying to achieve. I've used different batches of my perfered clay and glaze, installed new elements, throughly vacuumed the kiln, kept my bisqueware clean. I don't know what else to do to, and don't know what's causing the black specks. Does anyone have any insight on this issue?
Will post pictures as soon as I get home, but I read somewhere that one does not really have to fire greenware before glazing. I understand there is a risk, and I am increasingly frustrated with the quality of the pieces coming out of my kiln. Kiln fires to Cone 6, I bisque to Cone 06. I bought a 25lb mix of the Amaco Ironstone and have been super disappointed. Switched to clear glaze (amaco mixing clear) because I started doing work with mason stains and marbeling clay bodies together, wedging nicely, and then throwing the pieces. They turned out great, but I started experimenting with dipping greenware in the glaze, and brushing it on. The dipped pieces came out just as beautiful as the brushed pieces, but the glaze pooled and or looks slightly milky in the areas where a little extra glaze collected after dipping. (clear glaze was not cheap, I want to try making my own, and I know there are many recipes but never sure where to start... I triple checked that I measured and calculated the specific gravity properly (1.41 g/ml) and I'm wondering what the pros and cons of direct firing a greenware piece with glaze on it. The color seems to have come out the same, but dipping pieces are tough cause I cant use tongs, and small buildup seems to be inevitable with a hand held dipped piece due to awkwardness of holding while dipping. Also dont want handles to fall off into expensive glaze bucket... Brushing worked ok, but perhaps I should try spraying a light layer instead? Current picture is greenware, but hoping this shows that I'm not some n00b with terrible output. 2 marbling types to date. Ones for practice with terra cotta and stoneware, and the second with porcelain and porcelain mixed with mason stains with the same wedging and throwing process. I have lots of pictures documenting the process but I don't know if this would ever be requested for a How-To. Mostly looking for advice on: 1 - achieving a thin clear glaze (brushing vs spraying vs making my own glaze - since the 10lb bucket of mixing clear set me back $76!) 2 - pros and cons of direct glazing said greenware marbled pieces since coat will be thin and all the detail work lies within the clay so no thick / glaze run expected.