proofsartists' proofsbon à tirer proofsremarque proofscancellation proofscounterproofsprogressive proofscolor proofsproofs before lettersprinters' proofsengraver's proofstouched proofsartist's copiescollaboration proofscolor trial proofsspecial proofselements in blackelements in coloretch proofspublisher's copiespresentation proofsdedication copiesworking proofsreproduction proofsstate proofsprogress proofsimpressionsproofsprints by functionproofproof copiesproof printsproof sheetstest proofstrial printstrial proofstrial pulls