I've done this combination a few times. It runs, once right onto the kiln shelf! It does not consistently get the crystals or the gorgeous mossy green color where copper float meets the other glazes, but it does consistently pool blue toward the bottom (how much seems to be dependent on the shape of the mug). It's lovely!
Mugs are preformed bisqueware pieces from Mayco. I only glazed them.
Clay Body
Name: Mayco Stoneware Unknown White
Cone Specification: 5, 6
Colors: white
First Layer
Glaze: Mayco Stoneware SW129 Copper Float
Application Method: Brush
Interior and rim of first, larger mug. Rim only on second, curvier mug.
Second Layer
Glaze: Mayco Stoneware SW129 Copper Float
Application Method: Brush
Interior and rim of first, larger mug. Rim only on second, curvier mug.
Third Layer
Glaze: Mayco Stoneware SW129 Copper Float
Application Method: Brush
Interior and rim of first, larger mug. Rim only on second, curvier mug.
Fourth Layer
Glaze: Mayco Stoneware SW203 Root Beer
Application Method: Brush
Bottom of mug, up to copper float (little to no overlap).
Fifth Layer
Glaze: Mayco Stoneware SW203 Root Beer
Application Method: Brush
Bottom of mug, up to copper float (little to no overlap).
Sixth Layer
Glaze: Mayco Stoneware SW203 Root Beer
Application Method: Brush
Bottom of mug, up to copper float (little to no overlap).
Seventh Layer
Glaze: Mayco Stoneware SW192 Amaryllis
Application Method: Brush
Thick band overlapping where rootbeer and copper float meet.
Eighth Layer
Glaze: Mayco Stoneware SW192 Amaryllis
Application Method: Brush
Thick band overlapping where rootbeer and copper float meet.