Credits & technical sources

The platform uses multiple methods for calculating and validating ceramic glaze recipes. Below are the credits for the public sources that power those calculations. We believe explicit acknowledgment is the least we owe to the people who built the knowledge that makes this possible.

Takedown policy on request: if you are the author or rights holder of any data cited below and would prefer it be removed from the platform, write to suporte@keramoslab.com.br — we remove it without question and update this page.

Chemical analysis of raw materials

The oxide compositions (% SiO₂, Al₂O₃, K₂O, etc.) used by the chemical analyzers come from:

• Glazy.org — a public database of ceramic raw materials maintained by Derek Au and the community. Canonical averages for commercial feldspars, kaolins, frits and the like.
• Theoretical mineral compositions — for end-member minerals (pure silica, pure carbonates, pure chemical oxides) we use the direct stoichiometric formula. Public-domain knowledge.
• Manufacturer data sheets — when available, we prioritize the official analysis provided by the manufacturer for the materials it sells.

Important: chemical analyses are approximations. Every batch of raw material varies between suppliers and mines. Confirm with your supplier before firing at scale — these numbers are for chemical guidance, not a guarantee of purity.

Calculation methods

• Seger Unity Formula (UMF) — Hermann August Seger (1839–1893). A universal stoichiometric method for describing glazes as a molar ratio of fluxes : stabilizers : glass formers. Public domain.
• Stull Chart — Charles F. Stull, 1912. Variations in Glaze Properties Caused by Changes in the Acid and Basic Constituents, Transactions of the American Ceramic Society, vol. 14. A 2D map of SiO₂ × Al₂O₃ classifying zones of glaze behavior. Public domain.
• Limit Formulas by cone — acceptable ranges for each oxide by firing temperature. Synthesized from open literature, primarily the public work of Digitalfire (Tony Hansen) and Glazy.org.
• Empirical-percentage method(high temperature) — Prof. Tito Tortori, the platform's pedagogical partner. An original method used as the engine for generating executable recipes without consulting chemical tables.

Brazilian ceramist community

A directory of Brazilian suppliers of ceramic raw materials built from public information and the active ceramist community. If you are a supplier and want to correct or update contact details, write to us.