Ingeborg Foco on mon 20 dec 99
------------------
I have completed my first round of tests on the revision to Pete's =
Cranberry.
The tests were performed on 4 different claybodies--all =5E10. One was a =
gray
body, one white, and the other two a cream/buff. While there are =
differences
between the clay bodies, the glaze results are surprisingly similar. My =
report
to the list is only on the glaze test results. All of the samples were fired=
to
=5E10 with propane in a reduction atmosphere.
Original Recipe
Pete's Cranberry Altered =5E9,10,11 ( PCA186) R
a.. Custer Feldspar 74
b.. Gerstley Borate 10
c.. Whiting 11
d.. Flint 5
Add:
a.. Copper Carb .35
b.. Tin Ox 1.0
Very Red, True Cranberry color, Great depth, high gloss, breaks white on =
rims
and ridges. Runs badly when thick. Crazes badly.
----------------------------------------------------------------------------=
----
Ron Roy's Revision to Pete's Red =5E9,10,11 ( RRRPR193) R
a.. Feldspar G-200 53
b.. Frit 3134 15
c.. Whiting 10
d.. EPK 10
e.. Silica 12
Add:
a.. Copper Carb .35
b.. Tin Ox 1.0
Results: Glossy, Less Fluid, color more brown than red, Not bright clear =
as
original, no apparent crazing on upright test. Flat tile similar. Does not
break at rims
----------------------------------------------------------------------------=
----
RRRPR193
Add:
a.. copper carb .35
b.. Tin OX 2.0
Results: Glossy, smooth bright red with darker flecks, no apparent crazing,
does not break at rims. Is fluid but probably OK. with care. Upright and =
flat
tile are similar.
----------------------------------------------------------------------------=
----
RRRPR193
Add:
a.. copper carb .35
b.. Tin OX 3.0
Results: Glossy , smooth, bright red with flecks, nice depth, does not =
appear
to break at rims. Is fluid but not excessive Does not appear to be crazed. =
Is
very similar in color to the original PCA186. Upright test and flat tile are
very similar.
----------------------------------------------------------------------------=
----
RRRPR194
a.. Feldspar G200 49.5
b.. Frit 3134 15.
c.. Whiting 10
d.. EPK 10
e.. Silica 15.5
Add:
a.. copper carb .35
b.. Tin ox l.0
Results: Smooth, Not runny, no visible crazing, color red/brown, upright =
test
similar to flat tile.
----------------------------------------------------------------------------=
----
RRRPR194
Add:
a.. copper carb .35
b.. tin Ox 2.0
Results: Smooth , Not runny, no visible crazing, color red/brown, upright =
and
flat test similar
----------------------------------------------------------------------------=
----
RRRPR194
Add:
a.. copper carb .35
b.. tin ox 3.0
Results: Smooth, bright, clear , no visible crazing, color bright red with =
good
depth. dark flecks , both flat and upright tests similar.
appears to be fairly stable.
----------------------------------------------------------------------------=
----
Findings: RRRPR194 is less fluid than RRRPR193. with 3.0 tin ox it is =
very
close to the original Pete's Cranberry minus the running and crazing. It =
would
be a very good substitute and deserves further testing.
The versions with 1.0 and 2.0 tin oxide are not as attractive even though =
they
are stable. The color is definitely not bright clear read but brown red =
running
close to that dreaded liver color.
RRRPR193 is more fluid, however, an improvement on the original Pete's
Cranberry. The colors might be a bit brighter in the lower tin ox range,
however,the 3.0 tin oxide is clearly superior in color compared to the 1.0 =
and
2.0.
I carefully examined all samples for crazing (in good lighting and with a
magnifying glass) however, I can't be positively certain there is no =
crazing.
It appears there is none, However, on as small test piece which is =
saturated
with color, it is surprisingly difficult to detect crazing.
On the samples that came out brown/red and dead looking...one could say that
part of the kiln received more reduction (i.e.carbon) which in turn muddied =
the
samples. It is certainly a possibility. The kiln load consisted of 50=25 =
Copper
Reds, all of the pots came out in their full red splendor in every part of =
the
kiln. I also separated the flat test tiles from the upright tiles having =
them
located in different parts of the kiln.
In conclusion:
Both tests RRRPR193 =26 RRRPR194 with 3.0 tin oxide are very good =
substitutes for
the original Pete's Cranberry. I intend to further test these two in larger
quantities and on actual pots. Thanks Ron for your help.
Ingeborg Foco
Farren on tue 21 dec 99
Thank you, Ingeborg, for sharing your results with all of us. I have not had a
chance to do the tests (was looking at January) but now feel like I can try your
results on the ones you felt came out best. Your efforts are appreciated here.
Patricia
Ingeborg Foco wrote:
> ----------------------------Original message----------------------------
> ------------------
> I have completed my first round of tests on the revision to Pete's Cranberry.
> The tests were performed on 4 different claybodies--all ^10. One was a gray
> body, one white, and the other two a cream/buff. While there are differences
> between the clay bodies, the glaze results are surprisingly similar. My repor
> to the list is only on the glaze test results. All of the samples were fired t
> ^10 with propane in a reduction atmosphere.
> Original Recipe
>
> Pete's Cranberry Altered ^9,10,11 ( PCA186) R
> a.. Custer Feldspar 74
> b.. Gerstley Borate 10
> c.. Whiting 11
> d.. Flint 5
> Add:
> a.. Copper Carb .35
> b.. Tin Ox 1.0
>
> Very Red, True Cranberry color, Great depth, high gloss, breaks white on rims
> and ridges. Runs badly when thick. Crazes badly.
>
> ------------------------------------------------------------------------------
>
> Ron Roy's Revision to Pete's Red ^9,10,11 ( RRRPR193) R
> a.. Feldspar G-200 53
> b.. Frit 3134 15
> c.. Whiting 10
> d.. EPK 10
> e.. Silica 12
> Add:
> a.. Copper Carb .35
> b.. Tin Ox 1.0
> Results: Glossy, Less Fluid, color more brown than red, Not bright clear as
> original, no apparent crazing on upright test. Flat tile similar. Does not
> break at rims
> ------------------------------------------------------------------------------
>
> RRRPR193
>
> Add:
> a.. copper carb .35
> b.. Tin OX 2.0
> Results: Glossy, smooth bright red with darker flecks, no apparent crazing,
> does not break at rims. Is fluid but probably OK. with care. Upright and flat
> tile are similar.
>
> ------------------------------------------------------------------------------
>
> RRRPR193
>
> Add:
> a.. copper carb .35
> b.. Tin OX 3.0
> Results: Glossy , smooth, bright red with flecks, nice depth, does not appe
> to break at rims. Is fluid but not excessive Does not appear to be crazed. Is
> very similar in color to the original PCA186. Upright test and flat tile are
> very similar.
>
> ------------------------------------------------------------------------------
>
> RRRPR194
>
> a.. Feldspar G200 49.5
> b.. Frit 3134 15.
> c.. Whiting 10
> d.. EPK 10
> e.. Silica 15.5
> Add:
> a.. copper carb .35
> b.. Tin ox l.0
> Results: Smooth, Not runny, no visible crazing, color red/brown, upright test
> similar to flat tile.
>
> ------------------------------------------------------------------------------
>
> RRRPR194
>
> Add:
> a.. copper carb .35
> b.. tin Ox 2.0
> Results: Smooth , Not runny, no visible crazing, color red/brown, upright and
> flat test similar
> ------------------------------------------------------------------------------
>
> RRRPR194
>
> Add:
> a.. copper carb .35
> b.. tin ox 3.0
> Results: Smooth, bright, clear , no visible crazing, color bright red with go
> depth. dark flecks , both flat and upright tests similar.
> appears to be fairly stable.
> ------------------------------------------------------------------------------
>
> Findings: RRRPR194 is less fluid than RRRPR193. with 3.0 tin ox it is very
> close to the original Pete's Cranberry minus the running and crazing. It woul
> be a very good substitute and deserves further testing.
> The versions with 1.0 and 2.0 tin oxide are not as attractive even though they
> are stable. The color is definitely not bright clear read but brown red runni
> close to that dreaded liver color.
>
> RRRPR193 is more fluid, however, an improvement on the original Pete's
> Cranberry. The colors might be a bit brighter in the lower tin ox range,
> however,the 3.0 tin oxide is clearly superior in color compared to the 1.0 and
> 2.0.
>
> I carefully examined all samples for crazing (in good lighting and with a
> magnifying glass) however, I can't be positively certain there is no crazing.
> It appears there is none, However, on as small test piece which is saturated
> with color, it is surprisingly difficult to detect crazing.
>
> On the samples that came out brown/red and dead looking...one could say that
> part of the kiln received more reduction (i.e.carbon) which in turn muddied th
> samples. It is certainly a possibility. The kiln load consisted of 50% Coppe
> Reds, all of the pots came out in their full red splendor in every part of the
> kiln. I also separated the flat test tiles from the upright tiles having them
> located in different parts of the kiln.
>
> In conclusion:
>
> Both tests RRRPR193 & RRRPR194 with 3.0 tin oxide are very good substitutes fo
> the original Pete's Cranberry. I intend to further test these two in larger
> quantities and on actual pots. Thanks Ron for your help.
>
> Ingeborg Foco
Ingeborg Foco on wed 22 dec 99
Patricia, If you do test, hopefully you'll give us your opinion on the
crazing. I honestly can't be certain none of them crazed. It does seem too
good to be true....but would be really nice !!!
Happy Holidays
Ingeborg
----- Original Message -----
From: Farren
To:
Sent: Tuesday, December 21, 1999 11:41 AM
Subject: Re: RR's Revision to Pete's Red TEST RESULTS
> ----------------------------Original message----------------------------
> Thank you, Ingeborg, for sharing your results with all of us. I have not
had a
> chance to do the tests (was looking at January) but now feel like I can
try your
> results on the ones you felt came out best. Your efforts are appreciated
here.
>
> Patricia
>
>
> Ingeborg Foco wrote:
>
> > ----------------------------Original message----------------------------
> > ------------------
> > I have completed my first round of tests on the revision to Pete's
Cranberry.
> > The tests were performed on 4 different claybodies--all ^10. One was a
gray
> > body, one white, and the other two a cream/buff. While there are
differences
> > between the clay bodies, the glaze results are surprisingly similar. My
repor
> > to the list is only on the glaze test results. All of the samples were
fired t
> > ^10 with propane in a reduction atmosphere.
> > Original Recipe
> >
> > Pete's Cranberry Altered ^9,10,11 ( PCA186) R
> > a.. Custer Feldspar 74
> > b.. Gerstley Borate 10
> > c.. Whiting 11
> > d.. Flint 5
> > Add:
> > a.. Copper Carb .35
> > b.. Tin Ox 1.0
> >
> > Very Red, True Cranberry color, Great depth, high gloss, breaks white on
rims
> > and ridges. Runs badly when thick. Crazes badly.
> >
>
> --------------------------------------------------------------------------
----
> >
> > Ron Roy's Revision to Pete's Red ^9,10,11 ( RRRPR193) R
> > a.. Feldspar G-200 53
> > b.. Frit 3134 15
> > c.. Whiting 10
> > d.. EPK 10
> > e.. Silica 12
> > Add:
> > a.. Copper Carb .35
> > b.. Tin Ox 1.0
> > Results: Glossy, Less Fluid, color more brown than red, Not bright
clear as
> > original, no apparent crazing on upright test. Flat tile similar. Does
not
> > break at rims
>
> --------------------------------------------------------------------------
----
> >
> > RRRPR193
> >
> > Add:
> > a.. copper carb .35
> > b.. Tin OX 2.0
> > Results: Glossy, smooth bright red with darker flecks, no apparent
crazing,
> > does not break at rims. Is fluid but probably OK. with care. Upright and
flat
> > tile are similar.
> >
>
> --------------------------------------------------------------------------
----
> >
> > RRRPR193
> >
> > Add:
> > a.. copper carb .35
> > b.. Tin OX 3.0
> > Results: Glossy , smooth, bright red with flecks, nice depth, does
not appe
> > to break at rims. Is fluid but not excessive Does not appear to be
crazed. Is
> > very similar in color to the original PCA186. Upright test and flat tile
are
> > very similar.
> >
>
> --------------------------------------------------------------------------
----
> >
> > RRRPR194
> >
> > a.. Feldspar G200 49.5
> > b.. Frit 3134 15.
> > c.. Whiting 10
> > d.. EPK 10
> > e.. Silica 15.5
> > Add:
> > a.. copper carb .35
> > b.. Tin ox l.0
> > Results: Smooth, Not runny, no visible crazing, color red/brown,
upright test
> > similar to flat tile.
> >
>
> --------------------------------------------------------------------------
----
> >
> > RRRPR194
> >
> > Add:
> > a.. copper carb .35
> > b.. tin Ox 2.0
> > Results: Smooth , Not runny, no visible crazing, color red/brown,
upright and
> > flat test similar
>
> --------------------------------------------------------------------------
----
> >
> > RRRPR194
> >
> > Add:
> > a.. copper carb .35
> > b.. tin ox 3.0
> > Results: Smooth, bright, clear , no visible crazing, color bright red
with go
> > depth. dark flecks , both flat and upright tests similar.
> > appears to be fairly stable.
>
> --------------------------------------------------------------------------
----
> >
> > Findings: RRRPR194 is less fluid than RRRPR193. with 3.0 tin ox it is
very
> > close to the original Pete's Cranberry minus the running and crazing.
It woul
> > be a very good substitute and deserves further testing.
> > The versions with 1.0 and 2.0 tin oxide are not as attractive even
though they
> > are stable. The color is definitely not bright clear read but brown red
runni
> > close to that dreaded liver color.
> >
> > RRRPR193 is more fluid, however, an improvement on the original Pete's
> > Cranberry. The colors might be a bit brighter in the lower tin ox
range,
> > however,the 3.0 tin oxide is clearly superior in color compared to the
1.0 and
> > 2.0.
> >
> > I carefully examined all samples for crazing (in good lighting and with
a
> > magnifying glass) however, I can't be positively certain there is no
crazing.
> > It appears there is none, However, on as small test piece which is
saturated
> > with color, it is surprisingly difficult to detect crazing.
> >
> > On the samples that came out brown/red and dead looking...one could say
that
> > part of the kiln received more reduction (i.e.carbon) which in turn
muddied th
> > samples. It is certainly a possibility. The kiln load consisted of 50%
Coppe
> > Reds, all of the pots came out in their full red splendor in every part
of the
> > kiln. I also separated the flat test tiles from the upright tiles
having them
> > located in different parts of the kiln.
> >
> > In conclusion:
> >
> > Both tests RRRPR193 & RRRPR194 with 3.0 tin oxide are very good
substitutes fo
> > the original Pete's Cranberry. I intend to further test these two in
larger
> > quantities and on actual pots. Thanks Ron for your help.
> >
> > Ingeborg Foco
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