Claudia I Franco on fri 18 feb 05
Does anyone have a good way to test the layering of glazes? We have
several glazes (12)that i would like to systematically test by layering
and overlapping, and wondered if there was a good way to systematically do
it. I figured if I can make one large pot or plate, and make a grid of 12
x 12, that would give me each glaze on top of each other. How would i
add a third or fourth?? Any tips on how this can be systematically done
on a large scale, versus having to dip each tile 144 times??
TIA
Claudia
June Perry on sat 19 feb 05
Claudia,
During a glaze workshop I gave last year, I had the participants make a
series of 3"X 5" or 4"X6" about 1/4 to 3/8" thick tiles of the clay body the
studio uses. They ran the clay through the slab roller and cut the tiles when
the clay was at the "not too hard" leather stage.
Texture was run down the center of the tile using a small serrated tool so
they could see if the combination of glazes would break nicely and pool.
I also had them run a vertical line of wax resist on top of the bottom
glazes (about 3/8 of an inch wide. This sometimes will reveal an interesting
combination of colors.
Each tile was to test two glazes. The bottom half of the tile had one glaze
over the other and the top of the tile had the reverse.
A hole was made at the top of the tile for hanging and the back of the tile
was marked to indicate the glazes used.
The glazes were brushed on - several thin coats to get the desired thickness.
Using this technique, you can then just save the desired results and discard
the other tiles if you wish. They are easily stored- either hang them
individually or run them through some looped wire and hang.
With 12 glazes, which is what I think you said you have, you will get quite
a few possible combinations to test.
Regards,
June Perry
_http://www.angelfire.com/art2/shambhalapottery/_
(http://www.angelfire.com/art2/shambhalapottery/)
Marilu Tejero on sat 19 feb 05
Claudia,
You could make 24 tiles 9" by 6".
Number them like 1a and 1b, 2a & 2b etc. to 12a & 12b and dip one side only in each glaze.
Brush on top horizontally the rest of the eleven glazes, five on 1a, six on 1b.
I'd use a 1" brush generously loaded. You might like to overlap neighbouring glazes to see other results.
So you have your first tiles with #1 glaze and the rest on top, starting with #2.
The next tile 2a and 2b, glaze #2 with the rest on top, starting the horizontals with glaze #3
An so on, keep rotating, start your horizontals with the next number.
Make sure you keep good records, both on the back of your tile and in a book.
Another way could be brushing them horizontaly first then vertically with no base coat.
and overlaping.
After this you'll have a multitude of posibilities.
Claudia I Franco wrote:
Does anyone have a good way to test the layering of glazes? We have
several glazes (12)that i would like to systematically test by layering
and overlapping, and wondered if there was a good way to systematically do
it. I figured if I can make one large pot or plate, and make a grid of 12
x 12, that would give me each glaze on top of each other. How would i
add a third or fourth?? Any tips on how this can be systematically done
on a large scale, versus having to dip each tile 144 times??
TIA
Claudia
---------------------------------
Do You Yahoo!?
Todo lo que quieres saber de Estados Unidos, América Latina y el resto del Mundo.
Visíta Yahoo! Noticias.
Daniel Semler on sun 20 feb 05
Hi Claudia,
I'll take a swipe at this, if for no other reason than it kept me occupied
while I was pacing around in the middle of the night trying to get the baby to
sleep :)
Are you trying to get every permutation from the 12 glazes that can be layered
in sets of 2, 3 and 4 glazes ? This turned into a cool problem in combinatorics,
which I haven't played with in ages. Anyhow, if the ordering of the layers is
important, which with glazes it is, A over B often differing from B over A,
there are a lot of choices. For just the pairs there are a 132 unique
permutations, if you eliminate cases of the same glaze over itself. When you go
to all variations of three glazes out of 12 (again excluding using the same
glaze more than once in each case) there are 1320 ! You can do it with 10, 12 x
12 tiles, but honestly I think 12 would be simpler and lead to fewer errors. 4
is over 10 thousand !!! Of course, if this is not what you meant then I at
least amused myself in the middle of the night :)
So, if you want and exhaustive systematic test of these, it will be big.
Personally I'd be inclined to do the 2 glaze combos first (1, 12 x 12 tile) and
use that information to guide other tests. That way you can take a look at the
results and say, well glaze 2 over glaze 6 looks good, lets layer this combo
with the other glazes and see what those variations reveal. Greg Daly gives a
very simple method of testing overlap of glazes by painting vertical lines of
the glazes down a tile - in your case 12. Then paint, in the same order,
horizontal lines. This gives all the variations for combinatons of 2. I've done
this with 6 x 6 glazes but you could do it with twelve. BTW, to simulate
dipping, you need to brush it on thickly.
Just thoughts, hopefully some use.
Thanx
D
----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.
Darlene Yarnetsky-Mudcat Pottery on sun 20 feb 05
Hi Claudia!
Can't think of a way to not dip multiple times, but what I have done is
make a number of long tiles, each somewhere around 5 inches by 1.5
inches and dip these repeatedly. It goes pretty fast this way and they
can be propped up in the kiln so you can see how much they run (I
usually leave a little area clear of glaze at the bottom, and fire them
on an old shelf piece) One thing I found surprising was how different
some of the combinations looked when I chose to layer the same 2 colors
in a different order! Matt glazes over shiny and visa versa gave the
most interesting results.
Happy testing!
Darlene Yarnetsky
in Madison, Indiana USA
| |
|
