Here is a companion to the first bowl that we looked at that is just a bit bigger. This has no splash of copper, but there is a nice greenish area where wood ash has melted on the pot whilst it was being fired.
I wasn't too sure if liked the rather pointed and strong copper red splashes on this shino glazed pot when I took it out of the kiln, but it has grown on me, and I keep imagining it with a flower arrangement in it of rather tall stems and blooms.
Copper red. This started as a recipe in a Thames and Hudson glaze book by Stephen Murfitt, but was slightly modified by me when I made it. I substituted calcium borate frit, for standard borax frit, and I reduced the 5 percent tin oxide to 1.5 percent, and the 1.5 percent copper carbonate to 0.4 percent, and I added 2 percent bentonite. I thought the calcium borate would slightly lower maturing temperature to the glaze, and the reduction in tin and copper would give me a better, darker red! (Less is sometimes more!). This proved to be the case. The bowl was in the coolest part of the kiln which only got to about cone 7, and has worked marvellously well, better than where it reached cone 9.
Another copper red. Quite a different recipe to the one above it, and fired much hotter too. This came out more of a dark pink rather than a full red.
A surprise this one. It was put in the kiln late when loading and there was still a little space to use up. I had glazed the plate months ago with the thought of putting it in the electric kiln, but had not fired it.
I deliberately filled this pot with glaze and overflowed it to give the glaze runs that animate the pot. Len Castle Shino glaze on a sandy high fired stoneware.
Sculptural pot with crawled Malcolm Davis Shino glaze.
Glaze Recipes
Malcolm Davis Shino (Modified) Cone 7 - 11
Nepheline Syenite 40.9
Soda Feldspar 9.8
China Clay 18.2
Ball Clay 13.8
Red Earthenware 6.0
Soda Ash 17.3
Len Castle Shino (Modified) Cone 9 - 11
Nepheline Syenite 80
China Clay 15
Ball Clay 5
Salt 3
Yellow Ochre 0.5
T&H 145a (Modified) Cone 7 - 9
Soda Feldspar 45
Silica 20
Calcium Borate Frit 15
Whiting 15
China Clay 5
Bentonite 2
Tin oxide 1.5
Copper Carbonate 0.4
3 comments:
WOW! You have some real beauties there!
I know you had some concerns about the fast firing, obviously unneeded!
Your sculptural pot is wonderful, let yourself go with these forms, I love them; ditto about the dark copper reds and the variations in the red colors, some even venturing on purple, amazing color you have achieved; the free form bowls are super because who wants an everyday round bowl when you can get a free form one. Sending calming and healing thoughts to you across the pond
Hi Smartcat,
Thanks for cheering me on! Good to hear from you!
Hi Linda,
Thank you for your kind comments about the pots, and for your calming and healing thoughts, it is lovely to hear from you.
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