As a point of interest; UK bisque temperatures are much the same with
the exception of our white earthenware clays. At 06-04 these are
severely underfired and have not completed their *primary* shrinkage, so
much so, that if you bisque at that temperature and then glaze fire 04
plus the body will shrink more than the glaze, and the latter will
*shiver* off, especially on the rims. The right bisque temperature for
these clays is more usually in the regions of cone 1 (1150 C. ish)!

Steve
Bath
UK


In article , SpunMud
writes
i agree with Steve. note too that you don't always bisque at a lower
temperature than a glaze firing. the one example of this i can think of is that
a lot of commercial low-fire glazes are fired at about 06-05 but are best
applied to bisqueware that's been fired to 04.

--
Steve Mills
Bath
UK