Mid Fired Glazes

Chrome/Tin Pink Glossy Glaze

Mastering Cone 6 Glazes p102 Using 4108 in place of 3134

Fired to cone7-8 gas oxidation

Component Qty In Silica 200 28 True Whiting Omyacarb 10 20 True Nepheline Syenite 18 True Ball Clay FX 18 True Frit 4108 16 True Tin Oxide 7.5 False Chrome Oxide 0.2 False

Using Cone 6 rules Calculated Information Price/kg = $5.45 Expansion Coefficient = 5.12 Viscosity = -1.05 Surface Tension = 1.3 1. Expansion Coefficient Normal 2. Normal Viscosity 3. Surface Tension Normal 20. Rule 1 OK Enough silica for stable glaze 21. Rule 2 OK Alumina good for stable glaze 41. CaO high for functional 70. SiAl ratio high - Probably shiny finish

MF15-18 Ash Like

Greg Dalys Glazes and Glazing Techniques mid-fired glazes page 80

Fired to cone 7-8 gas oxidation

Component Qty In Barium Carbonate 33 True Talc 31 True Nepheline Syenite 20 True Lithium Carbonate 12 True Whiting Omyacarb 10 4 True MF18    MF15    MF17    MF16 MF15 - CoCO3 4% MF16- CuCO3 3% MF17 - Fe2O3 10%

Using Cone 6 rules Calculated Information Price/kg = $5.40 Expansion Coefficient = 7.87 Viscosity = -2.74 Surface Tension = 1.67 1. Expansion Coefficient High - may craze 2. Low Viscosity - may be runny 3. Surface Tension Normal 20. Rule 1 Silica low for stable glaze 21. Rule 2 Alumina low for stable glaze 40. KNa low for functional 41. CaO low for functional 42. MgO high for functional 46. Al2O3 low for functional 48. SiO2 low for functional 70. SiAl ratio high - Probably shiny finish 88. Probably variegated by Li2O especially with rutile and iron