The type and colour of paper you choose for your print job may affect the final printed colours within the job as all inks are transparent. For example, printing on an off-white paper stock may produce slightly darker colours than anticipated.
Similarly, there will be a visible difference in colour between a job printed on coated paper and another printed on uncoated paper. For example, common colours may appear different when printed on full colour letterheads on 120gsm bond, and full colour business cards on 400gsm silk. Adding a gloss or matt lamination will also have a noticeable effect on the appearance of your printed colour.