Proof cheap. What does that mean?

Proof cheap is a typical search term that people use in search engines to find a cheap, colour and legally binding proof. But what makes a cheap proof?

A proof is one that is produced according to the specifications of the latest revision of the proofing standard ISO 12467-7 and is within the tolerances of this standard. The current revision is ISO 12647-7:2016, which has been tightened even further with this standard and has been supplemented by a certified edition of spot colours such as PANTONE and HKS.

Such certified proofs can be ordered at shop.proof.de for all proof profiles.

But what makes the certified proof cheap? That’s the low price. Proofs are printed on certified proof papers on very high-quality pigment inkjet printers, usually using expensive proofing software, and measured with spectrophotometers. So how can production be done cheaply here?

1: Using cheap pigment ink?

One litre of ink for proofing devices is around 400 EUR, so it makes sense to use inexpensive alternative ink from China. The problem: there are no manufacturers – neither in China nor anywhere else – who produce inks that would actually produce similar inks in terms of pigment colour and spectral composition. I once called a manufacturer who advertises that his – already quite expensive – inks could also be used for proofing. When I asked him, he said: “No, no, that’s just for advertising, but of course I would never do that or recommend it, and I don’t know anybody who does that. As for the China inks, he said: “They start at 20 EUR per liter, but you get a different ink with every delivery, depending on where the wholesaler buys. Then they have to re-measure the proofer every time… forget it.” In addition, replacing a clogged print head costs around 2,500 EUR, so the risk is too high. A real proof therefore only works with original, very expensive ink.

2: Using cheap software?

GMG ColorProof, EFI Fiery XF and ORIS Color Tuner are just some of the most important proofing solutions on the market. What they all have in common is that proofing software is rather a niche software, so the programming effort is very high compared to the sales figures. Depending on the size of the output device and the range of functions in terms of verification, spot colour display or proofing on special materials such as transparent foils, etc., the software costs between 5,000 and 10,000 EUR, and in combination with other software products from GMG or Colorlogic it can quickly cost considerably more. Although there are a few low-cost solutions here too, these are usually irrelevant in professional proofing, as they are either not suitable for more than one workstation, or important functions such as spot colour libraries etc. are missing.

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Paper white from Arctic Paper, Surbalin from Peyer and more added

We have added 140 additional paper white values from Arctic Paper, Peyer, Igepa, Antalis and Mondi. As a result, a total of almost 1400 paper whites are now available in our database.

From the company Peyer we have added the colour shades of the Surbalin product range, although we have not covered all surfaces individually here. However, we have now also included other Peyer products such as Peytan, Peydur, Peyprint and Comet in the paper white database.

You can find the paper white database at shop.proof.de:

https://shop.proof.de/en/info/paper-white.html

Papierweiß von Arctic Papier, Igepa, Mundi und mehr

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How to match the production paper, proof standard and the proof precision of spot colours

Today a customer called who wanted to order a proof of several HKS N spot colours on an uncoated paper. “Which proof profile should I choose? And how exactly can you match my special colours in the proof? I probably have to proof several HKS N red tones in comparison. By the way, the printing is to be done on Fly Cream, a slightly yellowish paper.”

What is the paper white of the production paper?

First of all, I searched with the customer for the production paper in our paper white database. A quick look via full text search revealed that we have measured Fly Cream from Papier Union:

Fly Cream enthält gemäß unseren Messungen keine optischen Aufheller, also "keine OBA". Das LAB Papierweiss liegt bei allen drei Messungen bei rund  LAB 95 / 0,7 / 9,2
According to our measurements, Fly Cream does not contain any optical brighteners, i.e. “faint”. The LAB paper white in all three measurements is around LAB 95 / 0.7 / 9.2

With a B-value in LAB of 9.2, Fly Cream is really not just a little yellowish, as the customer said, but clearly yellowish, chamois, creamy … whatever you want to call it. So it was natural to check the proof profile “ISOUncoatedYellowish”, Fogra 30, to see to what extent the paper white could match.

What is the paper white of the possible proof standard?

Together with the customer we looked up our “paper white of proof profiles” table:

Das Papierweiss des Proofstandards Fogra30, ISOUncoatedYellowish
The paper white of the proof standard Fogra30, ISOUncoatedYellowish in LAB: 95.93 / -0.77 / 3.85

Contrary to the customer’s expectations, the paper white of ISOUncoatedYellowish is not even as yellowish as the paper white of the edition paper Fly cream, which is more yellowish by more than 5 steps on the B axis. So it was clear: PSOUncoated as a brighter-free uncoated paper proof standard is clearly too white, ISOUncoatedYellowish is much more suitable.

On what kind of proof paper will this proof standard be printed?

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Paper white of many paper manufacturers and online printers measured

We spectrally measured the paper white tone and the proportion of optical brighteners of over 1,000 papers of the most important paper manufacturers such as Berberich and Papier Union as well as online printing companies such as Flyeralarm and wir-machen-druck.de.

Example: Spectral data comparison of Antalis Coqueror CX 22 white for the measurement standards M0 and M1. Below you can also see the color deviation in Delta-E00 of 1.97 and the two paper white values in LAB and LCH.

Only a few paper manufacturers currently publish data on paper whiteness and the proportion of optical brighteners in their papers, but only technical indicators such as whiteness according to ISO 2470-2 or CIE ISO 11475. However, designers can hardly record paper whiteness with these values. In addition, it is not possible to read from these data whether and what proportion of optical brighteners the paper has.

Example above: Spectral data comparison of Antalis Coqueror CX 22 white for the measurement standards M0 and M1. Below you can also see the color deviation in Delta-E00 of 1.97 and the two paper white values in LAB and LCH.

Left: CGATS.17 Data for measurement conditions M1 and M0 for paper Antalis Conqueror CX 22 white

We have therefore measured the most important papers and dyes of all central paper producers and paper distributors as well as online printers in the three measurement standards M0, M1 and M2. From the difference in the paper whiteness of the two measurements M2 (UV cut without UV portion) and M1 (ISO 3664:2009 with noticeable UV portion), we determined the color distance on the yellow-blue axis of LAB in Delta-b and derived from this the proportion of optical brighteners according to Delta-B according to ISO 15397 and evaluated it.

Delta-B conversion: OBA share in the paper

Delta-B < 1 = faint OBA
Delta-B < 4 = little OBA
Delta-B < 8 = low OBA
Delta-B < 14 = moderate OBA
Delta-B > 14 = high OBA

Spectral data of all measured papers for download

Parallel to the images of the spectra, we have also provided spectral data in CGATS format for the measurement modes M0, M1 and M2, which can be downloaded for any paper. These values can be used, for example, in proofing software to calculate a paper white simulation for a specific production paper.

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Proofs for recycled paper. Is that possible?

We produce proofs for classic white uncoated papers on a daily basis, but the question often arises as to which proof standard could be used for printing on recycled paper.

In general, the paper white in a proof is precisely defined in the proof standard and is also measured in every test report.

For PSOUncoated it is 95.00 / 0.00 / -2.00 in CIELAB and for PSOUncoatedV3 it is 93.50 / 2.50 / -10.00, i.e. slightly darker (93.50 instead of 95.00 for brightness L) and significantly bluer (-10.00 instead of -2.00 on the B axis, i.e. the blue-yellow axis in the blue direction).

Recycling papers differ not only greatly from type to type in the area of paper white, but even from batch to batch. So if a printing company orders the same recycling paper in January and in February, the paper mill may well deliver a slightly different white value of the paper, as the paper white of course depends strongly on the recycled paper qualities used for production.

A colour-binding proof for recycling paper is therefore not possible, as no standard has ever been worked out due to the different paper qualities and white tones.

It is recommended for the proof to choose a classic proof standard such as PSOUncoated / Fogra 47, which shows a rather neutral, unbrightened paper white in the proof. Place one side of the recycled paper next to the proof and mentally transfer the colour of the proof to the white tone of your recycled paper. This way you can imagine the later printing result quite well.

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CIELAB HLC Colour Atlas available in the Proof.de Shop

It has taken almost a year, but we are all the more pleased now: The “CIELAB HLC Colour Atlas” is completed and can be ordered in our shop. The HLC Colour Atlas is a open source, high-precision colour system based on open standards.

The CIELAB HLC Colour Atlas offers professional users of colour three decisive advantages:

  • The CIELAB HLC colour atlas is based on open, non-proprietary standards that are free of copyrights and trademarks.
  • The colour atlas with all components is available to all users free of charge online and can be downloaded, used and passed on directly.
    It is released under an OpenSource Creative Commons license.
  • The printed reference of the CIELAB HLC colour atlas impresses with outstanding precision and, unlike some commercial products, the colour accuracy is extremely high with a DeltaE00 median of 0.3 and an average DeltaE00 of 0.5. In most cases, the deviation from the ideal colour reference and colour differences between two colour atlases can be measured, but not perceived by the human eye. Each atlas is produced on our best Fogra-certified high-end proofing printer on Fogra-certified paper. Each copy is delivered with an individual, colourimetric test report in accordance with ISO 12647-7:2016 to document the colour accuracy of each individual colour atlas.

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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: Continue reading

Proof GmbH: First Fogra 51 and Fogra 52 certified company worldwide

Proof GmbH has again been certified by Fogra in September 2015, this time for the standards Fogra 51 (PSOCoated_v3), Fogra 52 (PSOuncoated_v3) and Fogra 39 (ISOcoatedv2).

Fogra Certificate Proof GmbH for Fogra51 and Fogra52 Proofs (PSOCoatedV3 and PSOUncoatedV3 proofs)

The Proof GmbH has thus reaffirmed it’s quality by the strict criteria of Fogra. The tests Fogra conducted went far beyond the pure colorimetric readout of a media wedge. The special proofs for Fogra were evaluated among the following criteria:

  • Color accuracy of the Ugra / Fogra media wedge CMYK 3
  • Overall color accuracy and gamut
  • Uniformity and homogeneity of the proofsProof GmbH has again been certified by Fogra in September 2015, this time for the standards Fogra 51 (PSOCoated_v3), Fogra 52 (PSOuncoated_v3) and Fogra 39 (ISOcoatedv2).
  • Color and gloss of the proofing papers used
  • Tonal range and tonality
  • Register and resolution
  • Status information on the proof
  • Tonal values

The color matching our proofs submitted for the test was confirmed by Fogra with date of September 24, 2015. The Proof GmbH is thus the world’s first company that has certification for the production of contract proofs on a Fogra 51 and Fogra 52.

We are very pleased that our preparation and the efforts of the past few months were rewarded by a successful certification. You can order Fogra51/52 proofs in our proofing shop Order Fogra 51 / Fogra 52 Proofs (PSOCoatedV3 and PSOUncoatedV3).

The full, 12-page report from Fogra can be downloaded here:
Fogra certification report on Proof GmbH of 2015 No. 29712

Fogra 51 and 52: The new printing conditions start in September 2015

With long delay, the new printing conditions Fogra Fogra 51 and 52 – PSOCoatedV3 and PSOUncoatedV3 – will be presented at the end of September and finally come into practice. The German bvdm invites together with Fogra and ECI to a joint “kick-off” of the new printing conditions in the “Hochschule der Medien” in Stuttgart.

On Wednesday, the 30th of September 2015 from 10 o’clock representatives of the associations will introduce in the university the innovations, Karl Michael Meinecke wrote of the ECI mailing list.

In this kick-off the new, jointly developed printing conditions and  to implement the ISO 12647-2:2013 are presented to printing and media professionals. Attendance is expected to be free, but registration with name and company to the email address ks@bvdm-online.de is requested. The event takes place at the HdM in auditorium i003 in the Nobel Straße 10, D-70569 Stuttgart (Vaihingen) in the Stuttgart Media University.

Fogra51 and Fogra52: A difficult start

The launch of Fogra51 and Fogra52 had been marked by delays and disruptions. Large series of measurements had to be discarded after testing, measurement technology as the new SpectroProofer ILS 30 or new proofing papers were delivered only with great delay. Several seminars on how to manage the change to the new ISO standards in the Fogra are running since late last year with numerous participants in full swing – only the new standards were still not in sight. Now there is at least the kick-off date at the end of September in sight.

Cirtainly, all involved representatives of associations and interested companies were often reminded of the negative model of the US standardization bodies:

The IDEAlliance had presented in 2013 probably too hastily developed new printing conditions for GRACol 2013 and SWOP 2013, but so far they hardly play any role in practice. Why? Even the IDEAlliance open most their publications on the new standards with the tenor: “If you are not extremely color-critical, there is no reason to change from the old standards to the new ones … Conclusion: Please stay with their established, old workflow with profiles from 2006 … we are currently working on numerous ‘supplements’ …”

PSOCoatedV3 and PSOUncoatedV3: What definitely comes

But it is clear: The new standards will bring many changes to companies in printing and prepress: The individual changes in detail: Continue reading

Heaven 42 proofs on proof paper with optical brighteners

Good consistency in the paper white of proof paper and original Scheufelen heaven 42 paper color

Good consistency in the paper white of proof paper and original Scheufelen heaven 42 paper color

The Proof GmbH provides proofs for Scheufelen Heaven 42 papers on the new EFI 8245 OBA proofing paper. With this new proofing paper it is now possible to proof the bright-white paper dye of Heaven42l.

With Heaven 42 a bright white paper was developed by the German paper company Scheufelen, which opened up a new color whiteness. Especially technical motifs (shades of gray, silver tones from 4c, strong contrasts) act on Heaven 42 particularly brilliant and neutral. With an unchanged separation (eg with ICC profile “ISOcoated_v2”), but the printed image with the same color and dot gain looks considerably colder. Using images with warm tones (z. B. skintones) it is therefore recommended to do color adjustments.

We proofed Heaven42 on EFI Proof Paper 8245 OBA with optical brighteners and measure the Proofs M1 standard with consideration of optical brighteners. The proof can be provided with a UGRA / FOGRA media wedge and test report. Our Heaven42 proofs provide a good simulation of Heaven42 offered by Scheufelen for the ICC Profiles of Heidelberger Druck. The profile can be downloaded from the Scheufelen Website with additional notes from Scheufelen to pressure requirements etc., which are also included in the download of the profile.

The Heaven 42 Profiles can be downloaded here.

Scheufelen offers two ICC-Profiles for Download, we are proofing the profile of Heidelberger Druck (“_HD”).
Profile: Heaven42_AM_U280_K98_G80_HD.icc
Ink Coverage: ~280 % (U)
Black: GCR , 80 % (G)
Max Black: 98 % (K)
Proofing Substrate: EFI Proof Paper 8245 OBA Semimatt
Verification Profile: Made from Reference Data
Verification Light: M1 with OBA

Heaven 42 Proofs can be ordered directly in Proof store of Proof.de. Simply select the profile “Heaven 42 (Coated OBA)”.

Scheufelen Heaven 42 Heaven42 Vergleich mit ISOCoatedV2 Digitalproof der Proof GmbH

Bottom left: ISOcoatedv2 Proof on EFI Gravure Proof Paper 4245, Bottom right: Heaven 42 Proof on EFI Proof Paper 8245 OBA Above: Original paper white Heaven 42 by Scheufelen


Scheufelen Heaven 42 match with ISOCoatedV2 Digitalproof of Proof GmbH

Below: ISOcoatedv2 Proof to EFI Gravure Proof Paper 4245. Above: Heaven 42 Proof EFI Proof Paper 8245 OBA. Middle: Original paper pattern Heaven 42 Scheufelen

New Proof papers for Fogra51 and Fogra52 in use

Three weeks ago, we have introduced two new proofing papers for the proof of Fogra 51 and Fogra 52 Beta standard and other color standards, that require proof papers with optical brighteners:

EFI Proof Paper 8245 OBA Semimatte
EFI Proof Paper 8175 OBA Matte

A proof for coated papers with optical brighteners, we offer on semi matte EFI 8245 OBA semimatte with 245 gr / sqm. The EFI Proof Paper 8245OBA Semimatte has been specifically designed for proofing white and brightened, coated papers. The white point of this semi matte paper is very close to the values ​​of the FOGRA51 profile and thus allows proofing of FOGRA51 with virtually no paper white simulation at all. It is also well suited for simulating paper conditions PC1 according to ISO 12647-2:-2013.

EFI Proof Paper 8245 OBA Semimatt

Weight: 245 g / sqm
Thickness: 245 microns
Opacity:> 95%
Gloss: 22%
CIE L * a * b * (M0): 95.8 | 0.9 | -4.3
CIE L * a * b * (M1): 96.0 | 1.1 | -5.6

For Proofs on uncoated papers with optical brighteners, we offer proofing on matte EFI 8175 OBA matte with 175gr / sqm. The EFI Proof Paper 8175OBA Matte has been specifically designed for uncoated proof standards. It is highly brightened and very suitable for proofing of Fogra52.

EFI Proof Paper 8175 OBA Matte

Weight: 175 g / m²
Thickness: 230 microns
Opacity: 97%
Gloss: 5%
CIE L * a * b * (M0): 96.8 | 2.5 | -7.7
CIE L * a * b * (M1): 97.0 | 3.0 | -10.8

Fogra 51 and Fogra 52 Beta Proofs available

By switching to the new Fiery XF 6.1 and the use of the new X-Rite SpectroProofer ILS-30 measuring instruments, we are now able to proof the current beta versions of the new printing standards Fogra 51 and Fogra 52.

Since the current proofing profiles are available only in preliminary beta versions, the versions are of course not color binding and legally binding. Nevertheless, interested agencies and printers can get a picture of the current state of development and evaluate the coming changes of the OBA proofing papers used better match the colors of the new proofing standards.

We have created a new category in our Proof.de Store:
Fogra 51 / Fogra 52 Beta Proofs

The Fogra 51/52 Beta proofs are listed as follows:

Proof profile Coated:
PSO_Coated_v3_ECI Practice Fred15_Oct2014.icc

Proof profiles Uncoated:
PSO_Uncoated_v3_eci_Fred15-July2014.icc
PSO_Uncoated_blueish_v3_ (ECI) -Fred15-July.icc

Software: Fiery XF 6.1
Proof printer: EPSON 7900/9900
Measurement: Epson / X-Rite SpectroProofer ILS30
Measuring standard: M1 with UV

Proof Paper Coated: EFI Proof Paper 8245OBA Semimatt 245gr / sqm
Proof Paper Uncoated: EFI Proof Paper 8175OBA Matt 175gr / sqm

 

Proof.de Introduced new measuring technology: X-Rite SpectroProofer ILS30

With the new SpectroProofer ILS30 made by X-Rite, Proof GmbH has created the basis for automated measurements and Proof verifications according to M1 standard. Proofs with optical brighteners (OBAs – Optical Brightning Agents) can now be measured. Contrary to earlier announcements, the new SpectroProofer are also able to measure the current proofing standards as before in M0 measurement standard.

Because of the new ILS30 SpectroProofer, the layout of the Ugra / Fogra media wedge was slightly modified. For a comparison between old and new media wedge, see the image below.

Detailed X-Rite SpectroProofer ILS30 measuring head compared with X-Rite SpectroProofer ILS20

Detail Spectroproofer ILS30 front, ILS20 at the back


X-Rite Spectroproofer ILS30 Packaging

X-Rite Spectroproofer ILS30 Packaging

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Fogra Fogra 51 and 52: No Start in sight.

Fogra Fogra 51 and 52, optical brighteners and the new standards for offset printing and proofing are currently on everyone’s lips. In the proof area we still see only announcements and beta versions, but no real solutionsby now. In 2013 the reorganization of ISO 12647-2 was adopted for offset printing, but according to ECI the earliest “expected recommendation on the implementation of the new ISO 12647-2 as well as the provision of appropriate handouts and instruments’ will be in 2015. The current status of Fogra 51 and Fogra 52 from our perspective:

Color profiles:

  • Fogra Fogra 51 and 52 have completed the beta phase at the Fogra in May 2014 and were forwarded to the ECI. The there in the project “fred15” compiled information and downloads are but from March, July to October 2014, but since then there has been no more news on the new standards. So there is currently no date for the release of the final profiles, handouts and tools foreseeable. Fogra, ECI, bvdm and UGRA continue to work together on the new standards.

Proof Papers:

ONE Technologies: The proofing paper for Fogra 51, already announced in May is still not available today.

ONE Technologies: The proofing paper for Fogra 51, already announced in May is still not available today.

  • ONE Technologies announced in May 2014, the certified proofing paper “ONE Proof Paper 51 SATIN” on … that in November is not yet available anywhere.
  • GMG announced in October, the proofing paper “GMG Proof semimatte 250 OBA”, which to this day is also available anywhere.
  • Also working on new  proofing substrates is EFI, but naming, pricing and release dates are not known.

Measuring technology:

  • Epson announced in August to deliver from 1 September 2014 all Epson SpectroProofer measuring devices with the new measuring head ILS 30 only. Unfortunately, the new SpectroProofer is not yet commercially available as an accessory.
  • While all previous sources reported that the new SpectroProofer –  Although Fogra 51 and 52, ie M1 and M2 capable, can not measure ISOcoatedv2 or M0. EFI with Fiery XF 6.1 and the SpectroProofer ILS 30 support all measurement modes, ie Fogra 51 and 52 and ISOcoatedv2 simultaneously … unfortunately is neither Fiery XF 6.1. previously available nor the SpectroProofer … but according to EFI they are currently testing all 3 modes … M0, M1 and M2 with the new SpectroProofer … that sounds promising. Continue reading

Is it possible to proof on special paper such as production paper?

“We print 135gr/sqm on a Berberich Allegro. Can you make us a proof on this paper? Can you proof on our final production paper?”

Our telephone support often asks for a proof on production paper. Unfortunately, we always have to answer the question negatively. I would like to briefly explain the reasons for this in the following article.

Proofing on production paper is still technically impossible.

All proofing systems currently certified by Fogra are based on an inkjet printer as a test printer, mostly from Epson, Canon or HP. These printers are characterised by a large colour space, good resolution and excellent homogeneity and colour stability – all characteristics that are absolutely necessary for a proof printing system. The Epson systems used by the majority of proof printers are based on 11-colour pigment inks, which can reproduce a significantly larger colour space than e.g. ISOCoatedV2. However, the prerequisite for this is the use of special papers optimized for inkjet printing, in which the pigments and inks are optimally emphasized. This requires special coatings that are optimized for optimum reproduction, fast drying, good abrasion resistance and high UV stability of the print. On an image printing paper without these coatings, the ink would run, hardly dry and would not be smudge-proof. The color space would also be impossible to achieve. A proof would therefore not be possible from this point of view. Continue reading

Proof for Improved Newsprint (INP), Fogra 48

The default was:

“We need a proof for improved newsprint, white’76.”
“Do you know the proof profile?”
“No, unfortunately not. Can’t you decide that?”

We have looked into this question: UPM EcoPrime 76 H is printed on web offset paper in a large print shop. The information of the customer service there was:

“The default profile is Fogra 42, PSO SNP Paper (ECI) but that doesn’t fit at the back and front, is much too gray. “Proof according to Fogra 40, SC Paper (ECI), that’s much better.”

The two profiles do not match at all. SC Paper is for super-calendered paper, PSO SNP Paper for standard newsprint.. And the dot gain curves also differ completely. Continue reading

How colour-accurate are proofs?

A proof is prepared according to the currently valid ISO standard 12647-7 and is legally binding with a UGRA-Fogra media wedge and measurement report.

How does this check work?

If you need a proof with UGRA/Fogra Media Wedge CMYK V3.0, there are two ways to add the test report to your data.

  1. With proofing devices in which a measuring device is integrated, the media wedge with 3×24 standardised colour fields is printed directly under the proof data. This media wedge is driven directly in the proofing device to a kind of “hair dryer” in the measuring device and dried there. After a few minutes of drying, the media wedge continues and is measured directly in the proofer. This takes a few minutes. The measured values determined in this way are returned to the proof server and evaluated there. If the colour values are correct and within the tolerances of the strict ISO standard, a test report of the measurement is then printed directly under the media wedge, which guarantees you colour accuracy in accordance with the process standard offset printing.
  2. For proofing devices without integrated measuring device, only the standardized media wedge is printed under the proof data. A check takes place subsequently and outside the proof printer. The media wedge is then measured with an external measuring device and the target and tolerance values are output to a label printer. This label is then stuck directly under the media wedge.

What is the advantage of automated creation and checking of the media wedge directly in the proofing device?

  • Measurement is automated directly after proof printing, measurement errors due to manual operating errors are excluded. Since the test report is not subsequently attached, as is often still the case, manipulation is impossible.

Further information on the test report, the media wedge and on the work and responsibility of UGRA/Fogra can be found at www.ugra.ch and www.fogra.org.

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