ghost leaf at cone 10
firing to cone 10 in oxidation
slow downfire at 50 deg F an hour in the interval 1850 deg F to 1700 deg F
slow downfire at 25 deg F an hour in the interval 1700 deg F to 1650 deg F
One hour hold at 1650 deg F
ghost leaves on a white ground
The leaf has been stained with alberta clay slip the consistency of thin slip suitable for painting. The application was thick. With a lot of image manipulation this ghost leaf is visible. It's primary vein is slanted up slightly from the left and about one quarter of the way down the image, marked by the black hair. This is an off-white glaze, with leaf veins almost the same white.
The five attached diagonal edges are secondary veins. It has the location of the original embedded leaf. The veins are sharp and faint. Two of the veins are visible just below the black hair visible in the image.
I don't know how to proceed here. This leaf print is clean and sharp and nearly invisible. The glaze didn't flow through the structure of the leaf, so presumable a leaf print is possible, but what would the wash be, that this glaze won't eat?
Work in progress! I Want a visible embossed leaf, suggestions are invited. I suspect that a more refractory wash, a shino glaze, is likely to withstand the chemical reaction with the base glaze.
cooper_404_3_Z11NoIron
For c/10 this glaze is relatively low in alumina, with alkali metals nearly equal to alumina.
The fine sharp veins result from a substrate which is nearly stationary.
For reference, a picture of the full bowl, which is ~ 5 inches in diameter. The brown markings near the left top, mark the location of the leaf.
bowl with glaze cooper_404_3_Z11NoIron