Extremely Variegated Glazes

Share from Insight-live.com (Lab Documentation and Calculation System) by Digitalfire. https://digitalfire.com


Hilda Ross Rust

Code #

G3973

Materials Amt
Silica 10.200
EPK 17.200
Calcium Carbonate 19.600
Nepheline Syenite 47.400
Lithium Carbonate 5.600
Additions
Copper Carbonate 2.000
Iron Oxide Red 1.000
Tin Oxide 4.750

Total:107.75

Auto Unity Formula

CaO 0.51
Li2O 0.19
K2O 0.06
Na2O 0.19
(KNaO) 0.25
Al2O3 0.43
SiO2 1.97
CuO 0.04
Fe2O3 0.02
SnO2 0.08

Ratios

Si:Al: 4.6:1
R2O:RO: 0.5:0.5

Expansion

8.0 (Molar:8.1)

LOI

15.6

Cost

0.20 per kg

Notes

An example of a highly variegated glaze that does not attempt functionality.

The variegation is a product of melt fluidity, metal oxide saturation, thickness variation, the presence of titanium, tin or rutile, crystallization, phase differences, bubbling due to gas generation of decomposing carbonates, dark clay body below.

Pictures

G3973 Hilda Ross Rust at various thicknesses

XML (to paste into Insight)

<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Hilda Ross Rust" id="243882" key="1orc31cn" date="2023-09-08" codenum="G3973"> <recipelines> <recipeline material="Silica" amount="10.200" tolerance=""/> <recipeline material="EPK" amount="17.200" tolerance=""/> <recipeline material="Calcium Carbonate" amount="19.600" tolerance=""/> <recipeline material="Nepheline Syenite" amount="47.400" tolerance=""/> <recipeline material="Lithium Carbonate" amount="5.600" tolerance=""/> <recipeline material="Copper Carbonate" amount="2.000" added="true"/> <recipeline material="Iron Oxide Red" amount="1.000" added="true"/> <recipeline material="Tin Oxide" amount="4.750" added="true"/> </recipelines> </recipe> </recipes>

Born: 2023-08-28, Modified: 2023-09-08 15:11:40