Ceration
Zodiacal correspondence (Pernety, 1758): Sagittarius ♐
Ceration is the softening of a hard, dry substance into a waxy, fusible consistency, typically by repeatedly moistening (imbibing) and gently heating it; the name derives from cera, wax. It prepares a matter to melt and flow rather than burn or crumble. Pernety assigns the operation to Sagittarius. Ripley treats ceration together with exaltation in his tenth gate, a small but telling difference between the two twelve-fold schemes.
Historical Development
Ceration brings a dry, refractory substance to a soft, waxy state in which it can fuse and flow. The alchemist achieves it by alternately imbibing the matter with a liquid and gently heating it until it becomes malleable, like wax, hence the name from Latin cera. The operation expresses the close attention premodern practitioners paid to the consistency and workability of matter.
Pernety's 1758 table assigns ceration to Sagittarius. In Ripley's Compound ceration is not an independent gate but is joined with exaltation in the tenth gate; some later lists substitute a fiery operation here. These variations show that the sequences were never fully standardized, even among the most influential authors.
Textual Tradition
Ceration appears among the staged operations in the Latin tradition and in the gate-schemes of the fifteenth century. Lyndy Abraham's dictionary records its technical sense and its symbolic associations with softening and union.
Modern Scholarship
Modern commentators use ceration to illustrate how finely premodern practitioners distinguished consistencies and states of matter, a vocabulary that does not map neatly onto any single modern process and that rewards careful, non-anachronistic reading.