hal mc whinnie on wed 5 jul 00
-----Original Message-----
From: hal mc whinnie
To: cat ; joyce ; moore
; rhudy ; moore ;
chase ; gilois ; stauffer
; price ; gaylin
; wirt ; scuttell
; jansen ; sweigard
; kimball ; clayu
; jones ; skipper
; doner ; howenstein
; mc vittie ; maguire
; fergus ; steve
; bourland ; seidenberg
; molly ; buckley ; cotter
; johnson ; bitetto
; davis ; sarnia
; iswilson ; whitman
Date: Wednesday, July 05, 2000 3:22 PM
Subject: glaze of week july 8 2000
>HAL'S WHITE SATIN MATT
>CONE 9-10 REDUCTION
>SILICA 20
>GERTSLEY BORATE 20
>KAOLIN 20
>SODA SPAR 40
>ZIRCOPAX 10
>
>silica combines with the fluxes to create ceramic surfaces. Sources of
>silica are frits, feldspars, talc, and clays
>
>alumna is refractory and is valued for controlling glaze flow.
>boron encourages strong melts, sources of boron are gertsley borate and
>boron frits.
>sodium encourages strong melts
>
>sio2 high
>al2o3 normal
>melters low
>
>if glazes in this category contain reasonable sting melters they will be
>vitreous. their high silica content encourages durability and transparency.
>their normal alumna content discourages glaze flow even if strong melters
>are present.
>this is an excellent category for transparent glazes.
>
>
>
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