Proof viewing conditions
Correct viewing conditions are essential when viewing proofs. For accurate colour and tonal value perception, International Standards (ISO 3664:2000) state that lighting of 5000K “viewing conditions –Graphic Technology & Photography” are to be used.
The viewing area should be glare-free neutral Grey. The influence and effect of daylight when viewing material can also dramatically alter how colour appears.Measurement Data:
DeltaE tolerance is to be measured using D50. 2* observer and delta E (76) standard.3DAP v3 Tolerances for Proofing – these tolerances conform to ISO 12647-7 specifications
| For 3DAPv3 strip | For full ISO 12642-2 chart* | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Paper |
Avg |
Max |
Max |
Max |
Avg |
Tone Value Difference |
Avg |
Avg |
95% |
||
3.0 |
3.0 |
6.0 |
5.0 |
2.5 |
1.5 |
5.0 |
4.0 |
4.0 |
6.0 |
||
| Tolerance | * IT8-7.3, IT8.7-4 or ECI2002 |
||||||||||
Paper Types
The key benefit of using ISO standards is maximizing consistency in print.
3DAP has adopted guidelines for separations and ISO standards for proofing, paper and printing.
ISO paper stocks have been separated into five different paper types which are defined by the shade or brightness of the stock and its printing characteristics (expected dot gain). 3DAP has adopted two of these paper types - 1 and 3 - which are most commonly used in commercial / magazine printing in Australia.
Paper Type 1 is typically a higher brightness coated stock and may be used for most magazine stocks printed sheetfed, as well as the higher brightness web offset stocks.
Paper Type 3 is typically a mid to high brightness coated stock, generally with a lower mass per area weight (gm).
It is important to discuss the relevant paper types with your Publisher prior to the production of advertising material. This will ensure you utilise the correct separation profiles and produce the correct proofs for the printing process.
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