Merriam-Webster Collegiate Dictionary - collotype

 noun  Etymology: International Scientific Vocabulary  Date: 1881  1. a photomechanical process for making prints directly from a hardened film of gelatin or other colloid that has ink-receptive and ink-repellent parts  2. a print made by ~ COLLUDE  intransitive verb  (~d; colluding)  Etymology: Latin ~re, from com- + ludere to play, from ludus game — more at ludicrous  Date: 1525 conspire, plot ~d to keep prices high