Edouard Bastarache on wed 2 dec 09
> a few years ago I decided to make a cone 04 clay and a cone 9-10 glaze
> using local clay dug up from the land where our kiln is located.
> Originally, the low lands of Quebec were convered by the prehistoric Sea
> of Chanplain; from Julien Cloutier's book on Quebec's local raw materials=
> I obtained the mean of 15 samples analysed by our provincial Ministyry o=
> Natural Ressources.
> The cone 04 clay body was excellent and the cone 9-10 glaze also.
> See :
> and :
> Not having much of that local clay and taking into account the
> difficulties of refining it, and using 1of my glaze programmes I worked
> out a substitution using mainly Albany Slip.
> Edouard Bastarache
> My Books/Mes Livres
> ----- Original Message -----
> From: "John Britt"
> To: ;
> Sent: Wednesday, December 02, 2009 10:24 AM
> Subject: Re: Eutectic ...
> Guess I misread it. I thought it was referring to local materials, like
> Albany Slip, that you don't have analysis of. Then, empirical testing is
> needed. (Of course the analysis of Albany Slip is well known but many
> other local materials, like the stuff from the creek down yonder, aren't.=
> I have nothing against glaze software but realize, as you say, it is one
> tool and it has limitations.
> John Britt