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Unit 7 Topic 19
Using Unity Formulae
How can crazing be controlled by manipulating the unity formula of a glaze?
The Al2O3 : SiO2 ratio of the formula can be lowered in an effort to reduce the tendency of the glaze to craze.

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The oxide content of a unity formula can be changed so that the coefficient of expansion is lowered thus reducing crazing.
If the flux oxides do not add up to one then there will be an increased chance that the glaze will craze.
The silica content of the glaze can be lowered in an effort to reduce the tendency of the glaze to craze.
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