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Hi all. Am having trouble with pinholes. I am using some commercial glazes and one glaze I mixed up from a recipe I found online. I clean my pieces very well before I glaze. I allow to dry before glazing, and leave them covered until glazing. I believe maybe it could be my one glaze recipe, or perhaps it could be the firing. I rent a space and the owner does the firings. He will not let anyone else fire and he blames all defects on you or your pots. Any help is so much appreciated. I am attaching a photo of a bad example of a glaze with a pinhole I got this firing. I saw where I could add flux, or remove zinc or rutile? Here is my recipe for floating blue cone 6 I used: Neph Sy - 45.2 Gerstley Borate - 24.5 Silica - 18.9 EPK Kaolin - 5.7 Whiting - 3.8 Talc - 1.9 Bentonite - 2 Rutile Flour - 4 RIO - 2 Cobalt Carb - 1
I saw a video of a potter smashing a mug that was defective. This made me wonder what other potters do with a fired piece that failed. Other than smash 'em up cool videos, are there any good practices or ideas?