Bill Merrill on wed 14 nov 07
I just received the following from Plainsman Clay who produce Alberta
slip. I thought those of you who have used the slip would like to know
that Alberta 2 is not being produced. The letter I received is:
=20
Hello Bill,
My name is Joe and I work in the lab at Plainsman. Your request has
been forwarded to me. Please be advised that Alberta Slip 2 is not
available. I apologize if you have read information about this product
on the internet, there have been instances where we have removed
reference to it, but there is obviously more to be deleted from website
info. Alberta Slip when applied to bisque ware has a very high shrinkage
and will tend to crack and quite often flake off the ware. The purpose
of Alberta Slip 2 was to help alleviate this problem, the only issue was
that we could not get the colour quite right in a production type
atmosphere as compared to a lab testing procedure. Alberta Slip is a
unique product to Plainsman as approx. 60% of the clay in this mix comes
from our own clay quarries. If you are presently attempting to use
Alberta Slip on its own and with no other additives, it will help the
shrinkage problem a lot if you can calcine half of the quantity of
Alberta Slip that you intend to use. You must ball mill it once this is
completed as it will be too coarse to screen as is. I have mixed Alberta
Slip plain and calcined half and half and milled for one hour and the
liquid easy screened 100 mesh. At cone 10R.=20
this material produced a tenmoku like glaze, in cone 10 oxidation you
have to add 10% Frit 3134 to help a better melt. At cone 6 oxidation, a
mixture of 20% Frit 3134 and 80% Alberta Slip (50 percent calcined and
50 percent raw) produces a beautiful beautiful golden brown coloured
glaze on light coloured clays and enhances the colour of dark coloured
clays. I am sending you a picture of the Alberta Slip on M340 and M390
clays at cone 6 ox. and H550 at cone 10 ox. so you can see how it looks.
The recipies for these temperatures are once again listed above. If you
have any questions, please do not hesitate to contact me. Thanks, and
have a nice day, Joe.
=20
=20
Terrance Lazaroff on thu 15 nov 07
On Wed, 14 Nov 2007 16:01:29 -0800, Bill Merrill
wrote:
>I just received the following from Plainsman Clay who produce Alberta
>slip. I thought those of you who have used the slip would like to know
>that Alberta 2 is not being produced. The letter I received is:
>
>
>
>I find it odd that there was difficulty using the original Alberta slip.
I use it for my blue and white porcelain. My mix is 100 Alberta slip and
add the percentage of cobalt needed for the shade of blue. I test fired
Alberta slip alone to cone six and it gave me a transparent glaze with a
slight, ever slight tint of yellow. I also use it as a base for my colour
pigments. Maybe the reason that it works for me is that I use 400 cc of
water so the slip is not thick.
Terrance
Take a look at the blue and white on my website at http://clayart.ca
claystevslat on thu 15 nov 07
I use it in several glazes. I've never had the
problems described in the message Bill M. got.
I also find Alberta very easy to work with in
terms of mixing, settling issues, etc. I hope
Plainsman is working on a replacement.
-- Steve Slatin
--- In clayart@yahoogroups.com, Terrance Lazaroff wrote:
>
> >I find it odd that there was difficulty using the original Alberta
slip.
> I use it for my blue and white porcelain. My mix is 100 Alberta
slip and
> add the percentage of cobalt needed for the shade of blue. I test
fired
> Alberta slip alone to cone six and it gave me a transparent glaze
with a
> slight, ever slight tint of yellow. I also use it as a base for my
colour
> pigments. Maybe the reason that it works for me is that I use 400
cc of
> water so the slip is not thick.
>
> Terrance
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