underfired

- the bricks were underfired, that is, not brought up to and maintained at the minimum temperature of 950°C during the firing of the kiln;

Chapter 9 1989

But also as said above, the problem is not something that happens in an hour over a dinner -- the only danger could be if something with high acid content (salsas, lime, tomato or vinegar in the recipes, for example) is stored in a colorful, underfired ceramic dish for a long time.

Hot dishes 2004

But also as said above, the problem is not something that happens in an hour over a dinner -- the only danger could be if something with high acid content (salsas, lime, tomato or vinegar in the recipes, for example) is stored in a colorful, underfired ceramic dish for a long time.

Water bottle holder question 2004

These glazes are usually smoother than underfired matt glazes.

12. Developing glazes 1993

This type of matt glaze usually produces a more smooth surface than underfired matt glazes.

5. Simple glaze theory 1993

Engobes for biscuit application are more like underfired glazes.

10. Decoration 1993

It is sometimes necessary when glazes do not work correctly the first time - they may be too thin, underfired or not the right color.

10. Decoration 1993

If the new glaze seems underfired (dry surface), the fluxes can be increased.

16. Glaze formula calculations 1993

Often these underfired glazes will have other problems such as blisters and pinholes, but some glossy glazes make very good matt glazes if fired a few cones below their normal temperature.

5. Simple glaze theory 1993

Similarly, adding refractory oxides to a glaze (such as china clay or calcium carbonate) will produce a matt glaze that really is just an underfired glossy glaze.

5. Simple glaze theory 1993