Glaze testing

I was disappointed with how my previous glazes came out, they all turned out quite dark and uneven. I think I might have done a wrong firing for the red glazes as one turned blue and the other stayed white.

Photo 26-10-2017, 9 08 13 amPhoto 30-10-2017, 4 29 55 pm

 

I have a lot of slip casts ready to fire so this gives me the freedom to experiment more with glazes, my best option is to experiment with sprays to use on top of the blue and green glaze so I can achieve different effects and make another red glaze which would suit this type of firing.

Recipes of new glazes:-

Dark metallic with green edge (1060°)

Lead Bisilicate 53%

Feldspar 27%

Yellow Stain (There wasn’t any yellow so i used grey instead) 10%

China Clay 6%

Whiting 4%

+ Copper carbonate spray

Grey metallic with lime green (1060°)

Lead Bisilicate 55%

Feldspar 25%

Lime green stain 10%

China Clay 5%

Whiting 5%

+ Copper carbonate stain

Light Oatmeal (1080°)

Lead Bisilicate 47%

Potash Feldspar 25%

China Clay 16%

Whiting 12%

+ Managanese dioxide 3%

+Rutile Oxide 3%

Satin/Gloss mottled and speckled red/brown (1060°)

Lead Bisilicate 50%

Feldspar 30%

Tin oxide 10%

China Clay 6%

Whiting 4%

+ Red Iron Oxide Sprayed

Satin/gloss transparent with mottled red/brown (1060°)

Lead Bisilicate 57%

Feldspar 31%

China Clay 7%

Whiting 5%

+ Red Iron Oxide sprayed

For an even application I decided to use the spray gun, it was quite messy to use at the start as it was leaking but i soon got the hang of using it with out making a mess. This is how they looked after i glazed them.

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  1. Previous blue glaze
  2. Previous green glaze
  3. Grey metallic lime green
  4. Grey metallic lime green with copper carbonate spray
  5. Metallic black
  6. Metallic black with copper carbonate spray
  7. Satin/Gloss mottled and speckled red/brown
  8. Satin/Gloss mottled and speckled red/brown with red iron oxide spray
  9. Satin/gloss transparent with mottled red/brown
  10. Satin/gloss transparent with mottled red/brown with red iron oxide spray
  11. Light oatmeal
  12. Green with cobalt carbonate spray
  13. Blue with cobalt carbonate spray

These went in the kiln on Friday and will be fired to 1060°, i will be using a top-loader kiln as my booked test kiln was broken, i don’t know how to programme a top-loader so this was done by a technician for me.

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