Category: Glaze > Iron > Oil Spot
Created 2018-01-09 23:12:50 by Marco Vallesi
Categories: Glaze > Iron > Oil Spot
Firing Temperature: Δ9-10
Atmospheres: Oxidation, Neutral
Surface Type: Satin
Transparency: Opaque

The analysis are referred at a composition from several specimen of a same volcanic rock that came from North of Lazio (Italy). The glaze is simply the rock milled.

Percentage Analysis

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Unity Molecular Formula (UMF)

FLUXES

RO/R2O

0.16 Na2O
0.26 K2O
0.35 CaO
0.24 MgO
STABILIZERS

R2O3

0.76 Al2O3
GLASS-FORMERS

RO2

4.92 SiO2
OTHER

 

0.03 Fe2O3
0.13 FeO
SILICA:ALUMINA

SiO2:Al2O3

6.47

FLUX RATIO

R2O:RO

0.41 : 0.59

SiO2:Al2O3 Chart

Closest 29 neighbors in Glaze > Iron > Oil Spot.

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Stull Chart
SiO2:Al2O3 Ratio
SiO2:Al2O3 Ratio 6.47

Similar RO/R2O Unity Formulas

R2O3 - STABILIZERS RO2 - GLASS FORMERS RO/R2O - FLUXES
Recipe Name ΔTemp Al2O3 B2O3 SiO2 ZrO2 SnO2 TiO2 KNaO K2O Na2O CaO MgO ZnO BaO PbO Li2O SrO
Ignimbrite P oil spot (recipe) 9-10 0.76 4.92 0.42 0.26 0.16 0.35 0.24
oso Black, 10 0.73 4.88 0.01 0.44 0.3 0.14 0.35 0.22
Ignimbrite P 9-10 0.76 4.92 0.42 0.26 0.16 0.35 0.24

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