The act or process of making something crisp or curly, or the state of being crimped or wrinkled.
From Latin crispus (curled, wavy) + -ation suffix. The root crispus likely derives from an Indo-European base meaning to curl or turn. The meaning evolved from describing natural curls to the deliberate process of creating them.
The word crispation perfectly captures the physics of hair and fabric—when you heat or dampen something and then cool it, molecular bonds reorganize to hold new shapes. Medieval hairstylists were doing polymer chemistry without knowing it!
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