As with the Artist Proofs, the Printer's Proofs, or PP's are also printed at the same time as the rest of the edition and then signed as PP (or P/P) instead of being numbered. These proofs are given to the printer for his attention to the details of printing the edition. Some collectors feel that these proofs might be of a better quality than the rest of the edition as the printer may have put aside the best prints for himself. In actuality, the prints in an edition are generally all equal.