woodbury-type

Century Dictionary and Cyclopedia

1. n. A photomechanical process in which a matrix is produced from a negative on a plate of bichromated gelatin, hardened in alum, and transferred under very heavy pressure to a surface of metal. The resulting plate of metal affords very beautiful prints in the lithographic press. The printing is done in a pigment compounded with gelatin, the impression being hardened and fixed by immersion in a solution of alum. Compare heliotypy.
2. n. A picture produced by this process.

GNU Webster's 1913

1. n. A process in photographic printing, in which a relief pattern in gelatin, which has been hardened after certain operations, is pressed upon a plate of lead or other soft metal. An intaglio impression in thus produced, from which pictures may be directly printed, but by a slower process than in common printing.
2. n. A print from such a plate.