Category: Glaze > Green > Copper
Created 2015-07-23 09:23:27 by Glazy Admin
Categories: Glaze > Green > Copper
Firing Temperature: Δ6
Atmospheres: Oxidation
Surface Type: Matte

Source/Alternate names: Peter Pinnell

Firing Notes: cool maximum rate to 800C hold 1 hour

Notes: Alisa Clausen: used Johnson Matthey J frit instead of 3134, kaolin instead of china clay. Applied thick. A mat glaze that is well
melted and very smooth surface. The colour is a strong aqua green. The glaze is well covering and has a slight sheen, although mat.
Where it is thicker, has more sheen than where thinner, but green in both areas. Has a lush and thick look overall. Tested same glaze
with ball clay instead of kaolin. Resulted in a very similar glaze, but is slightly darker in overall colour. It is not as uniform in colour or
as bright as the recipe with kaolin. It has an appearance that the aqua colour is higher surface, over a darker ground. With kaolin the
glaze has an even colour, with ball clay, there is more colour play on the surface.

Variation on Pete Pinnell's Weathered Bronze w/o lithium. See Clay Times article
p.19 Mar/Apr. 2004. More of a satin-matt. Breaks white/light green. A
better-behaved raw glaze w/o lithium.

Material Amount Batch Subtotal
Kona F-4 feldspar 51.3
Strontium Carbonate 25.5
Grolleg Kaolin 13.6
Frit 3134 9.6
Total Base:100
Copper Carbonate 5
Titanium Dioxide 5
Total: 110

Percentage Analysis

Ingredient Amount SiO2 Al2O3 B2O3 MgO CaO SrO K2O Na2O KNaO Fe2O3 TiO2 CuO LOI
Kona F-4 feldspar51.334.2410.050.030.872.463.5460.020.1
Strontium Carbonate25.517.97.6
Grolleg Kaolin13.66.525.
Frit 31349.64.462.221.930.990.99
Copper Carbonate53.221.78
Titanium Dioxide55
100% no LOI 45.7315.

Unity Molecular Formula (UMF)



0.22 Na2O
0.09 K2O
0.53 SrO
0.15 CaO
0.01 MgO


0.45 Al2O3
0.1 B2O3


2.3 SiO2
0.19 TiO2


0.12 CuO





0.31 : 0.69

SiO2:Al2O3 Chart

Closest 100 neighbors in Glaze > Green > Copper.

Click and drag to zoom
Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 5.09

Similar RO/R2O Unity Formulas

Recipe Name ΔTemp Al2O3 B2O3 SiO2 ZrO2 SnO2 TiO2 KNaO K2O Na2O CaO MgO ZnO BaO PbO Li2O SrO
Pete Pinnell Seafoam 6 0.45 0.1 2.3 0.19 0.31 0.09 0.22 0.15 0.01 0.53
Pinnell Seafoam Glaze ^6 ox., 2 examples 6 0.46 0.1 2.31 0.2 0.31 0.08 0.23 0.16 0.53
Pinnell Seafoam Glaze, ^6 ox. Ball Clay 6 0.46 0.1 2.31 0.2 0.31 0.08 0.23 0.16 0.53
Pinnell Seafoam Glaze ^6 ox. Kaolin 6 0.46 0.1 2.31 0.2 0.31 0.08 0.23 0.16 0.53

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09/2016 Note: This is a new feature. If a recipe material is not listed, that material's data has not yet been added. Some materials only have GHS ratings, while others only have HMIS ratings. Warnings differ between systems and countries. Glazy does not take any responsibility for accuracy of linked SDS information. Contact your ceramics supplier for safety information for your specific materials.
Globally Harmonized System (GHS) Hazardous Materials Identification System (HMIS) SDS Link
Material Pictograms Signal Word Hazard Statements Health Flammability Hazard Protection
Strontium Carbonate Harmful WARNING Product dust may be irritating to eyes,skin and respiratory system.  1 0 0 E
Grolleg Kaolin 1 0 0 E
Copper Carbonate Harmful WARNING Harmful if swallowed.
Causes skin irritation.
Causes serious eye irritation.
Titanium Dioxide Health Hazard WARNING Suspected of causing cancer