leaf prints on pasta bowls
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
leaf prints
These leaf on various glazes show a range of detail from near photo realistic to left behind stain.
Each bowl has either two leaves, or one leaf with one side in each of the two washes. The two washes are Custer Feldspar, and EPK Kaolin.
If the wash is applied to a saturated iron glaze, it has some added rutile, else some added Red Iron Oxide.
Note that the two saturated iron glazes are full gloss, yet both show recognizable leaf prints.
One of the calico glazes, while seemingly a stiff matt glaze, nevertheless spread/ate the leaf wash.
The underlying glaze is as important to a sharp leaf print as the print media.
glaze composition
These glazes are all high in alkaline metals and in Li2O, and that is the only consistency.
Alumina runs from .32 to .55, CaO from trace to .16, MgO from trace to .12. Silica:alumina ratio runs from 5 to almost 8.
The non-saturated iron glazes are all moderately high in ZnO and BaO.
With the exception of the one calico glaze cooper_404_1PLi these glazes take a recognizable leaf print, albiet abstract.
That glaze, cooper_404_1PLi is a stiff matt, which flows readily.
wash composition
There are four leaf washes used:
1. custer feldspar with rutile
2. EPK Kaolin with rutile
3. custer feldspar with red Iron Oxide
4. EPK Kaolin with Red Iron Oxide
Each bowl has either Half of each leaf is stained with each of the two washes, or two leaves, one with each wash.
The glaze iron_8_R_C10_13 on a bowl ~ 8 inch diameter
The glaze iron_8_R_162_1Z_1 on a bowl ~ 8.3 inch diameter
The glaze cooper_404_1PLi on a bowl ~ 9 inch diameter
The glaze cooper_404_3_Z11NoIron on a bowl ~ 9 inch diameter
The glaze cooper_404_3 on a bowl ~ 9 inch diameter
