Proof. de offers proofs according to the latest tolerance criteria of ISO 12647-7:2016

The ISO 12647-7 proofing standard was revised in November 2016 and the test criteria for FograCert contract proof creation were adapted. We have now incorporated these changed criteria into our proofing system and are now working to the stricter tolerances of the latest ISO 12647-7:2016.

Why hardly anything changes for our Proof customers

The good news is: you won’t notice that our proofs are now precisely produced according to the latest standards. Why? Quite simply: Because our demands on our proofing system, our FIERY proofing software, our EFI proofing papers and the X-Rite measuring decvices are already so high that all components of our proofing system – and of course our proofs themselves – have been meeting the new criteria of the revised November 2016 standard for years.

The most important new features of the new Proof Norm in brief

1. colour accuracy

The new standard brings the classical formula for the colour distance Delta-E from the traditional definition of 1976 (CIELAB 1976) to the updated version of 2000 (CIEDE2000). Since the values cannot be converted directly, new tolerances for the test report are introduced, which are valid immediately. These new tolerances and new criteria are also the only difference that you will notice on our proof when you take a closer look at it.

Why this change: Fogra used measurements from the 116 Contract Proof Certifications from 2016 to show that the old and new tolerances of the old? These colors have so far had a? E-value that is too high in relation to the visual assessment. The new Delta-E values, on the other hand, are much more “equidistant”, i. e. with the human assessment of the colour distance, which Fogra has also demonstrated in tests.

The deviations of the gray axis and hue are now also determined more precisely, the evaluation of the hue spacing? You can also see this on the test report. The Fogra writes:”Since HC mainly depends on the hue angle, the evaluation of neutral grey or similar colours with sometimes very large differences in brightness and saturation did not yield meaningful results. The measure?Ch now describes the actual distance of a color pair in the CIEa*b* plane and is therefore no longer suitable only for the evaluation of the colorfulness difference of very rich colors.

2. durability of proofing papers

The ageing tests for proof papers were clarified more clearly with the introduction of the new standard. All certified proof papers undergo the following tests:

room temperature
(24 h at 25° C and 25% rel. humidity)
hot and humid environment
(24 h at 40° C and 80% rel. humidity)
dry storage
(1 week at 40° C and 10 % rel. humidity)
fastness to light
(at least level 3 of ISO 12040)
A proof now has to pass through all of the above tests without any difficulty, whereby it is now regulated that a new proof is used for each test, i. e. not a copy has to pass all tests one after the other.

3rd Optical Brightning Agents (OBAs)

Three years ago, the offset standard already included the categorisation of the optical brightener content in the offset standard, the proofing standard is now following suit and uses the same classification. The brightener content of the proof paper should be similar to that of the used support paper or belong to the same category, similar to the gloss of the proof paper.

4. Spot colours such as PANTONE and HKS

The new revision of the standard also includes criteria for the evaluation of spot colours such as PANTONE, HKS or TOYO. These can now optionally be evaluated within the standard, which is then done via a separate media wedge with test report. For measured spot colours, the tolerance for colour deviation must be within Delta-E 2.5.

In the example shown here, a proof file consisting of colored squares with 4 additional PANTONE spot colors is output: PANTONE 7441 C, PANTONE 2995 C, PANTONE Bright Green C and PANTONE ORANGE 021 C. These spot colors are recognized by the RIP and assigned to the respective internal color values, which can be seen in the line in the job ticket.

Between Jobticket and UGRA/Fogra media wedge, an additional media wedge can now be printed on which the contained spot colors – in this case the four PANTONE colors – are mapped. The measured results of the special color deviations can then be output in a separate test report.

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Proof GmbH is a partner of FreieFarbe e. V.

freeColor e. V. is a consortium of German and Swiss color experts who work to produce consistent color in all areas of application. Sounds reasonable? Exactly. That is the issue that is of central importance to our proofing customers. Therefore we are currently working in a project with the colleagues of FreieFarbe e. V. and are now also as Proof GmbH member and partner of FreieFarbe e. V.

FreeColor relies on open standards such as LAB and HLC, which have long been integrated in computer software and want to show: the computer is an ideal tool for color, it can make color free! The association FreieFarbe e. V. aims to promote colour communication without pursuing commercial goals.

freeColor e. V. would like to promote developments that…

  • Make coulor calculable
  • Make colour applicably
  • Make ink systems comparable
  • Simplify color communication
  • Have no license costs
  • Give Tips and hints for a correct cross-media colour workflow
  • make the multiple mysteries of color understandable

In recent months, Holger Everding, Peter Jäger, Eric A. Soder and Jan-Peter Homann have developed a completely new approach to this, which we were able to develop together with our colleagues into a product that we will present shortly.

We would like to take this opportunity to point out a great feature of the website of FreieFarbe. de: The colour database: Here you can look up the most important colour values for more than 300 colour systems and calculate colour comparisons of all kinds.

For the work within the association FreieFarbe e. V. the association is always looking for competent companions. If you, like us, are touched by the subject of colour in a variety of ways, there are many opportunities at fF to contribute with your knowledge and strengths. If you feel like our good cause, please contact us!

www.freecolour.org

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