Castro e Oliveira Guerra – Half Cristal Glass COG1

Experiment

Heritage

Research

Reproduction of a half cristal glass recipe from Castro e Oliveira Guerra Book

Material

Glass

Craft

Glass-making

General Technique

Combining

Specific Technique

The glasses were melted in an electric furnace and left to cool to room temperature inside.

Properties & Qualities

Application

Product, Sample making

Qualities

3D, Opaque, Rigid, Shiny, Smooth

Colour

Violet

Sample Information

Date of creation

01/02/2018

Process & Production

Firing program:
Ramp 600ºC – 4ºC/min, Dwell 1h
Ramp 900ºC – 4ºC/min, Dwell 1h
Ramp 1300ºC – 4ºC/min, Dwell 2h
Ramp 1000ºC – 5ºC/min
End

Recipe Details

SiO2 22.369 g, K2CO3 9.393g, Pb3O4 2.231g, Na2CO3 1.781g, KNO3 2.681g, BaCO3 1.119g, MnO2 0.058g, Sb2O3 0.085g, Universal 0.179g.

Credits

Craft Maker

Catarina Santos

Library Contributor

Cristiana Prada

Photographer

Catarina Santos

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