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One of the biggest strengths of the Digitalfire Reference Library is its taxonomy. It is based on the concept that adjustment, formulation and troubleshooting challenges in ceramics must be approached on the right level (or levels) to be effective. The levels group into chemistry, mineralogy and physical properties (or physical presence).
Chemistry
We put the knowledge of oxides and what they do at the lowest level. Glazes, for example, fire with properties that differ from each in ways that are predictable by the differences in the chemistry.
Mineralogy
Two material powders can be white and of similar chemistry, but if their mineralogy is significantly different (e.g. crystal structure of the particles) then they are going to behave differently in firing. An example a frit and a feldspar of similar chemistry will behave quite differently on firing.
Physical Properties
Two material powders can have the same mineralogy, but the the particle shape and size are different then they won't behave the same in bodies and glazes. Silica is a good example.
Recipes
Recipes are made of materials. The working and firing properties of a mix are a product of the proportions of materials in it (a combination of their physics, mineralogy and chemistry).
Process
The properties of fired ceramic are also largely related to the way in which the materials were prepared and processed. And the way in which any recipe made from them has also been prepared, formed and fired.
The 20 sections at the Digitalfire library reflect and organize naturally according to the above.
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Where do I start in understanding glazes?
Break your addiction to online recipes that don't work or bottled expensive glazes. Learn why glazes fire as they do. Why each material is used. How to create perfect dipping and drying properties. Even some chemistry. |
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