C10R TEST TILES

GROUP 2

Please read the  information on my home page for glaze safety information. These glazes were fired in the same manner as posted on the C10 R glaze group 1 page. As suggested in the other glaze test pages, you can copy this picture and save it in a free software like Paint Shop Pro and then magnify the image to get a better view of the color and texture.

RECIPES

Top row, far left tile is #6601 Color C June Perry Chun base, fired on Amador, an ironing bearing stoneware. The right side of the tile has porcelain engobe. Notice the total difference in color and depth. This is a smooth, buttery, gloss base. The color on the left is an intriguing textural mix of pale green, blue and tiny red dots throughout. See C10R GLAZE TEST GROUP 1 PAGE for the base recipe.

C color ADD: 0.2% Cobalt Carbonate, 0.5% Copper Carbonate, 5.6% Rutile

Top row, second tile from left is #1163 Color A on Windsor porcelain. This glaze is as bright a barium blue as the picture shows. It's a Carlton Ball glaze. It began to run at full cone 10. I had a pretty thick application on this tile. I think it might be a bit better behaved at C10 starting to C10 between 1 and 3 o'clock.

Nepheline Syenite     1770

Color A: Add 1% Copper Carbonate

Top row, 3rd tile from the left is #1023 Vivika Heino Blue Matt on Sasuga porcelain . This is a lovely butter barium matt with lots of textural interest and some pink flash on the upper part of the tile.

Barium Carbonate    26.2

Silica                           7.1

ADD: Copper carbonate 2.5%,  Bentonite 2%

Top row, far right tile is #439 Color B June Perry  calcium matt. This is a dryish matt with intriguing breaking of yellow to blue. It would be nice on textured pieces, ie. small slab boxes, of the bottom half of a jar, etc.  The second version was my attempt to make it a little less matt. You will find a smoother glaze, but not quite the same color as  the original.

                                 ORIGINAL            VERSION 2 (less matt, and little different color)

Nepheline Syenite           35                          40

Silica                                10                           10

Color B, ADD: 0.25% Cobalt Carbonate

Second row from top, far left tile is #2653 June Perry Stony Matt White. This is quite matt, but not dry. It is a soft, greyish white. This would be a nice glaze to use on simple vases. It's a soft, quiet glaze but with some textural interest. Because of the high magnesia content, you would  probably get lavender  flashes if you use a cobalt overspray or a lavender to purple glaze with the addition of cobalt 1/2 to 3% to the base. Some tin oxide (about 2-3%) in place of  half the zircopax, for instance might promote the pink/lavender/purple tones.

Nepheline Syenite         38.84

Zircopax                           6.38

Second row from top, second tile from the left is #2536 Color C June Perry Matt White on a iron bearing stoneware (looks like Los Altos). This tile was fired to C11 and the top of the tile was double dipped.  As you can see, it came out a gloss because of the higher firing. This glaze is a bit low in silica even for a cone 10 glaze. I  think it would actually be a nice, smooth, matt around cone 8 or  9.  If you want to use it as a cone 10 matt, which was my original intention,  see the revised additions below.  Because of the Barium I would not use this on functional ware.

                                 ORIGINAL                                    REVISED

Custer Feldspar            46.57                                        (Up Silica to 8gr., Grolleg to 24 gr. to  meet C10 SiO2 limits)

Silica                               1.72

C color, ADD: 12% Zircopax

Second row from top, 3rd tile from the left is #2652 Color J June Perry Limestone base . This glaze is  buttery gloss and very white and opaque, over the porcelain engobe that was applied on the right side of the tile. On the left side, it is not a pure white. It is a bit transparent where it breaks over the incised lines in the tile. If you're using it on a dark stoneware and want it to be more opaque, up the Zircopax to about 17 or 18% for starters. You can also try subbing strontium carbonate for the Barium Sulphate.

Kona F4 Sodaspar     35.12

Silica                           28.46

J Color ADD: 15% Zircopax

Second row from top, far right tile is #2651 G color June Perry Limestone base, on an iron bearing stoneware. This is a slightly warmer white than the one next to it. Like the other one, it also has porcelain engobe on the right which makes it whiter and more opaque than the left side. This recipe is within C10 limits using Insight software. If you don't want to use barium carbonate you can  replace the barium with strontium carbonate; but not gram for gram. You have to multiply the amount of barium by .75 (3/4's the amount). In this case that would be  4.04 grams of strontium carbonate.

Kona F4 Sodaspar     29.41

Silica                           35.02

G Color, ADD: 13.5 Zircopax

Third row from the top, far left tile is #2652 Color A. It has porcelain engobe on the right side of the tile and the top half of the tile has been double dipped.  See above for base recipe.

Color A, ADD: 5% Rutile, 2% Copper Oxide, 2% Cobalt oxide

Third row from top, second tile from left is #2651 color A, on an iron bearing stoneware, without much body reduction.  See above for base recipe.  See above for base recipe.

Color A, ADD: Rutile 5%, Cobalt oxide 2%, Copper oxide 2%

Third row from the top third tile from the left is #278 D a Glick Celadon base on Soldate 60 claybody. This is a very smooth, buttery gloss  base. This color is a quiet, dark blue that resembles the color of a brand new page of jeans. It will be brighter and lighter on a white stoneware or porcelain.

Kona F4 Sodaspar     67

Silica                         14

D color ADD: 0.5% Cobalt carbonate, 1% Red Iron Oxide

Third row from the top, far right tile is #2623 Color B June Perry Textured Blue Matt, on an iron bearing stoneware.

Custer Feldspar             38.1

Cobalt Carbonate           1.5

Bottom row, far left tile is #5862 Vivika's Orange on Amador, an iron bearing stoneware. The right side of the tile has porcelain slip. You can see this same glaze on one my Soda/salt test tile pages. Here it's a matt and in the soda/salt it became a gloss with quite a different color range.

Bottom row, second tile from left is #1595 Vivikas  base w/slight alterations with my colorants. You can use this on porcelain or stoneware. This test is on an iron bearing stoneware, like Rod's Body or Amador.

Custer Feldspar                             27.6

Magnesium Zirconium Silicate     33.3

I miss marked the color letter on the tile; but here are some of the versions I tested for varying tones of yellow and gold and one pale blue. You might try just 4% Rutile because the color is very similar to #2603 the glaze next to it.

This glaze is best applied on the thin side. It is not a good inner glaze, but is a lovely matt for exterior stoneware or porcelain. The color will be lighter on the porcelain, so you might want to make a separate porcelain tile or apply porcelain slip to one side of the tile. Most of my tests were done on either Rod's body or Amador. Both are iron bearing stonewares.  I test F color on a white body and it came out a light, lavender blue in light reduction.

A. 0.91 Red Iron Oxide. Pale golden yellow.

JP. 1 3/4 Rutile, 2% Red Iron Oxide -Lovely yellow to yellow orange where thinner. The back of the tile was more yellow.

Bottom row, third tile from the left is #2603 Color A June Perry Matt Yellow, on iron bearing stoneware. This is a nice yellow with a nice smooth feel. There is porcelain engobe on the right side. This was fired to C 10 starting.

Nepheline Syenite          36.41

Soda Ash                           1.78

ADD: Zircopax 15%

Color A, ADD: 4% Rutile

Bottom row, far right tile is #2596 Winokur Yellow Orange Matt on an iron bearing stoneware. This is a beautiful, rich, yellow/orange matt. This tile was fired to C10 at 1 o'clock.

Custer Feldspar              43.9

Tin Oxide                          2.8

ADD: Red Iron Oxide 1%

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