arlene h. on tue 17 aug 99
I have been attempting to produce the fern-like decoration of mochware. I
have been using Peggy Heers white slip recipe with stain of mag. diox.,
water, ACV and tobacco. No fern. Should the white slip be dry or wet?. The
piece horiz. or vertical? Thanks for helping.
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M. R. W. on wed 18 aug 99
Arlene-
I watched a potter on Vancouver Island do this. He
dipped a dry piece of greenware into a vat of white
slip, let it drip for just a second or two and while
it was still shiny wet he applied a brushful of 'tea'
to the vase while holding it upside down. The amount
of 'tea' squeezed out varied with the pressure he
applied to the brush-the more tea squeezed out the
further it ran down the side of the vase an spread
out fern-like immediatly and beautufully. We bought
the vase!! I'm sure it will take a great deal of
practice.
Reg Wearley
Big Arm, MT
--- "arlene h." wrote:
> ----------------------------Original
> message----------------------------
> I have been attempting to produce the fern-like
> decoration of mochware. I
> have been using Peggy Heers white slip recipe with
> stain of mag. diox.,
> water, ACV and tobacco. No fern. Should the white
> slip be dry or wet?. The
> piece horiz. or vertical? Thanks for helping.
>
>
> ______________________________________________________
> Get Your Private, Free Email at
> http://www.hotmail.com
>
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Mike Bailey on thu 19 aug 99
In message , arlene h. writes
Dear Arlene,
You dab the Mocha Mixture on to the slip immediately after you've
applied it. Sometimes you have to play around with the thickness of the
slip and mixture to get maximum dendritic growths.
Cheers,
Mike.
>----------------------------Original message----------------------------
>I have been attempting to produce the fern-like decoration of mochware. I
>have been using Peggy Heers white slip recipe with stain of mag. diox.,
>water, ACV and tobacco. No fern. Should the white slip be dry or wet?. The
>piece horiz. or vertical? Thanks for helping.
>
>
>______________________________________________________
>Get Your Private, Free Email at http://www.hotmail.com
>
--
Mike Bailey
arlene h. on thu 2 sep 99
Thanks to those who responded to my initial question; I now have positive
ferning results! Now i have mixed what were called blue and green stains
for mochaware however all turned out black in bisqueing. Chemistry is
beyond me and I am new to glaze/stain mixing. Was i a doofus to expect
coloured results? The recipes used cobalt carb. and copper carb; the black
used mang. diox.
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arlene h. on fri 3 sep 99
I am a doofus; sorry Richard for responding directly to you. I am a fairly
new potter, and even newer to this modern technology.
The recipes for anyone else interested are from What Every Potter Needs to
Know by Jeff Zamek.
The basic solution is: water 29 gm
apple cider vinegar 29 gm
tobacco of one king sized cigarette
For black stain add manganese dioxide 20 gm
blue add cobalt carbonate 5 gm
green add copper carbonate 5 gm
After mixing ingredients, allow to age for 24 hours. Sieve 3 times thru a
100x mesh screen then discard the dregs. Shelf life is 2 weeks
I did have to increase the amt. of ACV in each stain after testing.
Altho I am in Canada, I had Marlboro cigs which I sacrificed for art.
I hope this will work well for others. Thanks again for asking!
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Martin Howard on fri 3 sep 99
How much cobalt and copper did you use, Arlene? Put in too much and you
will get some kind of black. You cannot get a really good black without
cobalt. Let's see you figures and then we can suggest a change.
I am hoping to do some more Martin Howard
Webbs Cottage Pottery and Press
Woolpits Road, Great Saling
BRAINTREE
Essex CM7 5DZ
01371 850 423
araneajo@gn.apc.org real work on mocha tea work this next week.
Mike Bailey on fri 3 sep 99
In message , arlene h. writes
Dear Arlene,
Do I gather that you have only bisque fired so far? If so, all you will
see is black. The colours will be developed when you put a glaze over it
- the brightest colours will come from using a transparent, shiny glaze.
Good luck!
Mike.
>----------------------------Original message----------------------------
>Thanks to those who responded to my initial question; I now have positive
>ferning results! Now i have mixed what were called blue and green stains
>for mochaware however all turned out black in bisqueing. Chemistry is
>beyond me and I am new to glaze/stain mixing. Was i a doofus to expect
>coloured results? The recipes used cobalt carb. and copper carb; the black
>used mang. diox.
>
>______________________________________________________
>Get Your Private, Free Email at http://www.hotmail.com
>
--
Mike Bailey. Bath. U.K.
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