Proofs
If you are submitting a proof, always supply a proof of the very latest version. If possible, a 1:1 scale version of the proof should be given. If the proof is not 1:1 scale, this should be clearly marked.
Digital proofs can be divided into two groups, content proofs and contract proofs.
Content proof
The proof is produced using a printer or copier. The proof can be used to make a rough check on the accuracy of the text and colouring (“red is red”), but the colours do not correspond to the printed end product.
Contract proof
By contract proofs is meant proofs which can be used to check colour tones. The proof is made on a proofer calibrated for print quality. The validity of a contract proof must be checked by measuring a color bar, like Fogra Media Wedge, which has been printed on the proof. The proof is acceptable, when all tolerances are passed. Equip the proof with the OK-label of an accepatable measurement.
NOTE!
With contract proofs the following limitations may be encountered:
- It is not always possible to predict the influence on print quality of the paper used in the printing.
- It is not always possible keep the final printed product identical to the proof as far as all colour tones are concerned.
- If the digital proof technique does not produce halftone dots, moiré effects caused e.g. by difficult textile patterns might not be reproduced on the proofs.
Pruf must be valid and contain all mandatory elements according to ISO 12647-7:2016, Fogra PSO and BVDM.
- Fogra MW 3
- Job ticket
- Measurement
- Result in tolerances
In this case product will be printed according ISO 12647-2:2013
Observing environments of proofs
The colours of contract proofs, as well print, must be examinated in standard lights D50 (5000 K).
IMPORTANT!
A change in lights changes also the viewing of colours in a observer’s eye. Note, that between print and proof, the change can be different due to different materials.