ed

is on ideal curve for firings to cone 9, it tokes from @ o'clock in the moming until about
1) oelock ef maght ond neglects nothing,

'B it Oo vorotion of “A using on overnight heat-up so that the firing con be completed be-
teoen Bo om. and 5 p.m

“C“ ond “D’ are loge of octual firings conforming to “A" ond “B™
“E" and “°F are drawn from memory of firings | hove observed:

“E’ toes the some total time os “A, roughly the some amount of fuel ond reaches the same
final cone but the time of the fine! development phose is less Shon halt. Neither the glaze

or the strength of the body were fully developed and there was a three cone range within
the kiln

"EY ig an attempt to make a kiln mecognize civil service working hours. Blowing up of ware and
black-coring were common occurences in this shop and the temperature range within the
kiln wos olwoys excessive

A careful and exact visual log of this sort should be kept of every firing, ofter 27 years of
firing | find it more important than ever, The importance will become obvious by the time the
third log has been completed A copy of the kiln-log form | use is reproctuced on the reverse of this
page