ISO 3664 Lighting Condition Audits limitations
There are a couple of methods to create an ISO-3664 Audit
- based on Lighting Inspector in CC Capture
- creating measurements with CC Display
- Manually uploading data into Lighting Inspector
Full ISO-3664 Audit
Note that the ISO standard requires measurement in whole spectral bandwidth 300-740 nm with a spectral resolution of 5 nm
Most popular instruments on the market don't cover such a spectrum! The table below shows those parameters
Instrument | CC Capture | CC Display | |—> | <—| | resolution | sampling | |
ISO 3664 specification | 300 | 780 | 5 nm | ||||
1 | X-Rite i1Pro family | + | + | 380 | 730 | 10 nm | 3.5 nm* |
2 | Konica-Minolta FD-7 | + | 360 | 730 | 5 nm | ||
3 | Konica-Minolta Myiro-1 | + | 360 | 730 | 5 nm | ||
4 | GL Spectis 1.0 , 1.1, Spectis Touch 1.0 | 340 | 780 | 1.7 nm | |||
5 | GL Spectis 1.3 | 340 | 750 | 1.7 nm | |||
6 | GL Spectis 4.0 UV-VIS-NIR | 200 | 1050 | 0.5 nm | |||
7 | GL Spectis 5.0 Touch VIS | 340 | 850 | 0.5 nm | |||
8 | GL Spectis 5.0 Touch UV-VIS | 200 | 800 | 0.5 nm | |||
9 | GL Spectis 5.0 Touch VIS-NIR | 380 | 1050 | 0.5 nm | |||
10 | GL Spectis 5.0 Touch UV-VIS-NIR | 200 | 1050 | 0.5 nm |
Note: GL Spectis family of instruments requires manual upload of measurement file exported by optional software: SPECTROSOFT.
Partial audit
Printing Industry has to manage the UV component of the light due to two reasons
- most of the substrates on the market use OBAs
- some inks can be based on fluorescence phenomena
For both scenarios a UV component is converted into visible light and controlling the lighting condition also in UV-part is important, however, we have to remember that in a typical print-house environment we are probably using fluorescent tubes that have well-known emission of the UV components and optical brighteners are designed to utilize specific UV frequencies only.
Knowing that we may decide to perform a partial audit based on non-fully compatible measurements. In the real world, it almost never happens that a partial audit will pass and a full not. It is because we are not using unknown sources of light!
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