true-to-scale process

noun

: a photomechanical process based on the insolubilizing action of iron salts on gelatin wherein a lithographic image is obtained by contact exposing a line original to blueprint paper that is squeegeed without development to the surface of a moist gelatin printing pad

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now