Sagger: a Fireclay Box Moulded Round a Wooden Mould (Bourry, 1911)

The kiln box that shields ware from flame and soot: a fireclay-and-grog slab beaten flat, rolled round a wooden mould for the wall, joined to a slab bottom by hand, then dried and burned. Saggers stack in piles with wads of soft fireclay between. Usually oval, sometimes square or rectangular; size to suit the ware. Source: Emile Bourry, A Treatise on Ceramic Industries (1911), pp. 233, 352-356. Unknown: proportions, sizes, firing temperature. Picture: Fig. 173 of the book.

متوسط

Unknown

التعليمات

Make the body

Mix fireclay with as much grog as possible, of fairly coarse grain, coarse and fine together, into a firm body. Not given: proportions.

المواد لهذه الخطوة:

طين حراري1 قطعة

الشاموت (خزف محروق مسحوق)1 قطعة

ماء1 قطعة

الأدوات المطلوبة:

مجداف خشبي

Beat out the slabs

Dust a table with grog and fix four rules on it as thick as the slab. Mould slabs of the body by hand between them, firm enough to be shaped roughly by striking with a wooden bat, then smooth them.

الأدوات المطلوبة:

الشاموت (خزف محروق مسحوق)

مادة غير معروفة

مجداف خشبي

شوبك

Form the sagger

Roll a slab round a wooden mould whose outside is the inside shape of the sagger. Stand the mould on a second slab for the bottom and join the two by hand. Strike the body so it lengthens slightly and comes loose, and draw the mould off upward.

الأدوات المطلوبة:

مادة غير معروفة

مجداف خشبي

Dry and burn

Dry it slowly, then burn it as fireclay goods are burned. In use, stack saggers in piles with wads of thin fireclay between them to seal and steady them.

الأدوات المطلوبة: