Wednesday, November 3, 2010

Cone 6 Oxidation results Group 2

Cone 6 Oxidation results Group 2
by Terry Rorison
To see explanation and Group 1 click on the link below:
 http://wpapotters.blogspot.com/2010/11/cone-6-oxidation-results-group-1.html

 47 over 48





47 Floating Blue C/5




Gillespie Borate 0.26

Neph Sye 0.48

EPK 0.06

Flint 0.2

Cobalt Carbonate 0.02

Rutile 0.04

Red Iron Oxide 0.02





48 Oribe type c/5




Standard Ceramic Cone 6 glaze #1125 1

Black Copper Oxide  0.052

Rutile  0.02





52

52 Raspberry Semigloss C/6






Gillespie Borate 0.21

Neph Syenite 0.16

EPK 0.11

Whiting 0.2

Silica 0.32

Tin Oxide 0.05

Chromium Oxide 0.0075






53

53 Cranberry C/6







Neph Syenite 0.18

Frit 3134 0.14

Whiting 0.2

OM#4 Ball Clay 0.18

Silica 0.3

Tin Oxide 0.038

Chromium Oxide 0.002

 54

54 Jeannie's Purple Semigloss C/6




Neph Syenite 0.18

Frit 3134 0.14

Whiting 0.2

OM#4 Ball Clay 0.18

Silica 0.3

Chromium Oxide 0.002

Tin Oxide 0.038

Cobalt Carbonate 0.006

55
 
55 Goodrich Raspberry C/6




Gillespie Borate 0.21

Neph Syenite 0.16

EPK 0.11

Whiting 0.2

Silica 0.32

Tin Oxide 0.05

Chromium Oxide 0.0015

59
59 Matt Yellow C/6




Strontium Carb (Toxic) 0.1579

Whiting 0.1053

Zinc Oxide 0.1053

Minspar (f-4) 0.5262

Tenn Ball Clay 0.1053

Rutile 0.03

Nickel Oxide 0.015



63

63 Speckled Blue Gray C/6




Gillispie Borate 0.2

Custer Spar 0.2

Frit 3110 0.15

Tenn Ball Clay 0.15

Silica 0.3

Cobalt Oxide 0.01

Red Iron Oxide 0.015

Titanium Dioxide 0.05





64
64 Off White Satin Matt C/6




Barium Carb 0.05

Whiting 0.19

Custer Spar 0.54

EPK 0.16

Silica 0.06

Zinc Oxide 0.09

Rutile 0.05
67

 
67 Plum Glaze C/6




Gillespie Borate 0.13

Whiting 0.087

Custer Spar 0.609

EPK 0.087

Silica 0.087

Red Iron Oxide 0.115








71

71 Waxwing Brown C/6




Frit 3134 0.345

Talc 0.095

OM4 Ball Clay 0.25

Silica 0.31

Red Iron Oxide 0.15

Titanium Dioxide 0.0015




72
72 Waterfall Brown C/6




500

Frit 3134 0.335 167.5

Frit 3195 0.26 130

OM4 Ball Clay 0.17 85

Silica 0.235 117.5

Red Iron Oxide 0.125 62.5

Rutile 0.001 0.5









77
77 Raw Sienna C/6




Frit 3195 0.23

Wollastonite 0.28

Neph Syenite 0.04

EPK 0.28

Silica 0.17

Rutile 0.06

Red Iron Oxide 0.06


 86

86 Zinc Semimatte/Glossy Base Glaze Blue C/6




Neph Syenite 0.36

Wollastonite 0.13

Zinc Oxide 0.1

EPK 0.1

Silica 0.31

Copper Carbonate 0.05

Rutile 0.06

 116
116 Transparent - T5 C/6 Orange

Minspar 0.56

Bentonite 0.02

Dolomite 0.065

Lithium Carb 0.037

Whiting 0.082

Zinc Oxide 0.041

Silica 0.195

Yellow Stain Standard's K83 0.06

Red Stain Standard's #487 Red 0.06

 117

117 Transparent - T8 C/6 Yellow




Minspar 0.373

Bentonite 0.02

Dolomite 0.066

Lithium Carb 0.037

Whiting 0.118

Zinc Oxide 0.041

Silica 0.345

Yellow Stain Standard's K83 0.1







2 comments:

  1. I have been struggling with #53 Cranberry. It comes out grayish w/tints of reds. I have a Skutt 1027 kiln and glaze to cone 6. Every other glaze I have made from recipes works like a champ except tones of reds. We are using a medium dark stoneware. I tried increasing the chrome ox 1/2 again as much to .03% I have been making 500 gram batches and I have a scale that measures down to the 0.1g. Any ideas or help would be greatly appreciated.
    Darci@bresnan.net

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  2. Darci, rather than increasing the chrome you might try decreasing it slightly. With the other two reds above the ratio of tin to chrome is much higher than #53. I would also try the glaze on a lighter clay body to see if it comes red for you. I fired the three reds above on a white stoneware and a buff stoneware and all three worked well. I just fired another batch of the three today to see what effect a slower cooling rate would have on the glazes. I have a new kiln controller and also have replaced the thermocouple but today the witness cones read cone 6 flat and glossy so I suspect the kiln went to at least cone 7. However, all three reds came out fairly nice. It seems like the cone 6 reds with tin and chrome require a low amount of Chrome to create red so going higher with the chrome won't likely give you what you are looking for. Are you sure you are using frit #3134? Also, have you tried either of the other two reds above?

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