Mishima Tests: Pre-Firing

A couple of weeks ago I posted the results of my underglaze tests and briefly mentioned my plans to use the underglaze with a mishima process in conjunction with laser etching. Here are my four etching tests with underglaze and a frit/mason stain mixture before the firing, to test the effects of the underglaze and the stain into 2 different depths of etching.

Underglaze Recipe
33.3% Frit 3124
33.4% EPK Kaolin
33.3% Commercial Stain

Bailey Stain Recipe
85% Frit 3124
15% Commercial Stain

Test 1A = Etching Power 100, Speed 20 with Bailey Stain
Test 1B = Etching Power 100, Speed 20 with Underglaze

Test 2A = Etching Power 100, Speed 75 with Bailey Stain
Test 2B = Etching Power 100, Speed 75 with Underglaze

NOTES:
-The underglaze was mixed to a paste consistency and rubbed into the etching lines with my fingers
-The Bailey stain was mixed to the consistency of milk and embedded into the etching lines with a brush
-Tests are not on “More Vitreous” recipe