dsgeater Posted May 22, 2017 Report Share Posted May 22, 2017 I'm working with B3Brown (Laguna) and I really like the color and surface texture when it is fired (C5). BUT stoneware glazes I use are bubbly/pin holed and dull - not matte but dull in color and surface. Lower fire glazes are fine if I refire at 05. I'm planning to bisque, fire to maturity, and then glaze fire at lowfire range. My question is, can I skip the bisque firing and fire greenware to cone 5, glaze, and fire to cone 05? Would that be too much shock for the greenware? I will test as needed but thought someone might know. Thanks! Link to comment Share on other sites More sharing options...
Marcia Selsor Posted May 22, 2017 Report Share Posted May 22, 2017 Laguna B3 is a dark manganese clay body that fires to almost black at ^5. I can see why ^5 glazes aren't working well for you. Yes you could fire it to ^5 first without bisque if it completely dry and others work aren't in the kiln. You'll need to fire slower. Then you can go back and glaze fire at ^05. Use precautions with manganese clays. Manganese can penetrate skin on contact. Fumes during firing are hazardous. Many mid-range glazes are enhanced if you soak them for 20 minutes to 2 hours or so at the high temperature. Then you can soak again around 05 on the way down as it is cooling and not fire them twice.This helps with iron red. Your firing sounds underfed- dull, bubbly and pinholes. Fire your bisque slower to get rid of impurities causing pin holes. Some will disagree. Smooth out pinholes if you see them as you're glazing this can also be caused by the porosity of the bisque. dampen the bisque before glazing or ujst rub them when the glaze is dry using a dry finger. Marcia Link to comment Share on other sites More sharing options...
neilestrick Posted May 23, 2017 Report Share Posted May 23, 2017 You're going to have a hard time applying glaze to work that has already been fired to vitrification. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted May 23, 2017 Report Share Posted May 23, 2017 Often low fire commercial glaze will stick to vitrified surfaces if brushed on. I have done it in the past. Marcia Link to comment Share on other sites More sharing options...
dsgeater Posted May 23, 2017 Author Report Share Posted May 23, 2017 Thank you both. I'm going to try (brush) glazing after C5 and firing as usual to C4. I'll report back. Link to comment Share on other sites More sharing options...
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