Cone 6 Crystalline Glaze Base

Fa’s #5 (Revised)	Cone 6
Zinc Oxide	27.0 %
Talc	5.0
Ferro Frit 3110	50.0
Spodumene	4.0
Silica (325 mesh)	14.0
	100.0 %
Add: Titanium Dioxide	2.0 %

Glaze was on cone 10 porcelain tiles.

Kiln Program

Increase temperature 350°F per hour to 700°F

Increase temperature 750°F per hour to 2000°F

Increase temperature 150°F per hour to 2210°F (this puts cone 6 over, cone 7 at 1 o’clock position)

Hold at 2210ºF for 10 minutes

Cool down 750°F per hour to 2000°F, hold for 1 hour

Cool down 750°F per hour to 1900°F, hold for 3 hours

Kiln off, vent off, total firing 9–9½ hours

Glaze #1 Base

 Glaze #2 Red Iron Oxide 3.5%

 Glaze #3 Cobalt Carbonate 1%

 Glaze #4 Barium Carbonate 8%

 Glaze #4 (Detail)

 Glaze #5

Copper Carbonate 4%

Cobalt Carbonate .25%

 Glaze #5 (Same Glaze)

 Glaze #5 (Detail)

Observations

*Glaze application was not thick enough (painted on with three coats)

*Glaze #4 with barium carbonate produced the most crystals, possible because of its lower melting temperature

*Glaze #5 produced two distinct colors because of its placement in the kiln