| 摘要 |
A colour proofing apparatus, comprising:
- an engraved roller (12) having a pattern of ink accommodating cavities on its peripheral surface,
- a back pressure cylinder (14) forming a nip with the engraved roller (12),
- a conveyor (16) adapted to feed a sheet (18) of a print substrate through said nip in synchronism with the movements of the peripheral surfaces of the engraved roller (12) and the back pressure cylinder (14), and
- an optical sensor (30) disposed at the conveyor (16) for measuring a colour value of the sheet (18) that has passed through the nip. |
