Black Magic Slip Test Batch (dry)
Description: The same great Black Magic Slip in a test batch size of 2lbs. This color slip has the potential to add even more options to your current batch of glazes by having it underneath your glaze. Be sure to follow the directions to understand how to apply it.
Mixing: Add a bit of water and mix it into a thick mud - then, continue to add a little more water as you go. Screen it through an 80 mesh screen when it gets to a thick - buttermilk like consistency. Add a little more water until it reads a 40 - 42 on a hydrometer,
Application: Applied to Coleman Porcelain. (any other clay bodies will need to be tested).
1) BMS can be applied at a much thicker consistency when a pot it just thrown and ribbed off of extra water and slip.
2)When the porcelain is leather hard it can be applied as a thinner application with a brush, spray, or dip. (you might need to pre-wet the clay a bit with a water-quirt bottle). Test it.
3) When the porcelain is bone dry we like to apply it with a spray gun. We use a spray gun from Northern Tools with a 2.1 spray tip. Visit my IG account for a video kline.sculpts.porcelain
Bisque Fire to ONLY cone 010 (that's 1650 degrees F) so the BODY ABSORBS GLAZE. LOL. Bisque firing to cone 04 is meant for super rugged stoneware, or other specialized crystalline glaze techniques. Bisque firing your work to cone 04 closes off the body. If the studio your potting at is doing this - they need to update their knowledge.
5) Then, apply your favorite glaze as a dip or spray. If you're dipping glazes onto porcelain bisqueware that's been bisque fired to cone 010, you'll want your glaze to be at around 40 - 42 on the hydrometer. (or, 1.4). Then, maybe count to 3 or 6 seconds so it has a chance to build a tiny bit of thickness on the bisqueware. Sometimes I like a quick, thin dip.
Test!! And keep good notes. That's all I've done for 20 years and I've found some amazing glazes by testing.
Works best fired to cone 10 in a reduction atmosphere.
Images: Like these glazes shown in these images: Black Magic Slip with Copper Red on the fluted cup on the left. Also, with a copper purple glaze on the right. Cups created by Tom Coleman and fired to cone 10 in a reduction kiln.