CGATS is the abbreviation for ‘Committee for Graphic Arts Technologies Standards’, which translates as ‘Committee for Standards in the Graphic Arts and Technologies’. It is an international organisation that deals with the development of standards and norms for the graphic arts industry. These standards cover a wide range of topics, including colour management, printing technologies, image processing, measurement and testing methods, to ensure that processes and products in the graphic arts industry are uniform and of high quality.
CGATS works closely with other standardisation organisations such as the International Organization for Standardization (ISO) to ensure that the standards developed are accepted internationally and can be applied in different countries and industries.
The CGATS standards play an important role in the graphic arts industry, helping to ensure the quality, consistency and accuracy of print products, colour management systems and other graphic arts technologies.
However, CGATS can also refer to files in which, for example, colours are stored in CGATS format. For example, all measurements of paper whiteness carried out by Proof GmbH can be downloaded with their spectral values in CGATS files from the Proof GmbH shop.
CGATS files usually contain standardised information that is important for accurate colour reproduction and quality assurance in print production. Some of the data that can be saved in a CGATS file is listed below:
- Measurement data: CGATS files can contain measurement data from colour measurement devices or spectrophotometers, which are used to record the colour values of printed products or colour samples. These measurements can be saved in the form of spectral values or XYZ colour space coordinates.
- Colour profiles: Colour profiles describe the properties of input and output devices such as monitors, printers and scanners. CGATS files can contain information about these profiles.
- Colour measurement standards: CGATS files can contain information about reference colours or colour measurement standards that are used to calibrate colour measurement devices.
- Print parameters: In print processes, CGATS files can save parameters such as print colours, ink application, print resolution and other print settings.
- Metadata: Additional information such as creation date, author, purpose and description can be embedded in CGATS files to document the context and purpose of the stored data.
- Reference data: CGATS files can also store reference data for specific colour standards or printing processes.
The exact structure and format of CGATS files may vary depending on the specific requirements and standards of the graphic arts application or industry. These files are important to ensure accurate colour reproduction and high quality in print production.
In 2021 proof.de was again Fogra certified including Fogra “Spot cert” certification, i.e. for the display of spot colours such as PANTONE C and U.
Even almost 9 years after the introduction of the successor colour space PSOCoatedV3, ISOCoatedV2 / FOGRA39 is still the most widespread colour space in Europe. We at Proof GmbH count around 200 jobs from time to time for the German Printing and Media Industries Federation, among others. In the last count, proofs in ISOCoatedV2 accounted for around 68% of all proof jobs at our company. This is a clear sign of the continued widespread use of the colour space. ISOCoatedV2: From the classic colour space to the beacon of the … read more
After Eddy Hagen pointed out in this posts, that there were some major colour deviations between the brand new PANTONE Solid Coated Guide 2023 and the previous version especially for the PANTONE 2635 C, I was curious to lookup the same colours in the new PANTONE Color Bridge Coated Guide of 2023 and compare the colours with the previous version. I measured a dE00 of 8,15 between the two colours that Eddy mentioned, which is really far apart from how accurate PANTONE colours should match between the different PANTONE guides. … read more
In recent years, various problems have arisen with our previous proof paper supplier. On the one hand, we sometimes had to wait more than three months for paper deliveries; on the other hand, we sometimes had significant problems with batch-to-batch discrepancies, surface defects and much more. After lengthy deliberations, we decided in December to replace all the paper. We therefore received pallets of new paper at the turn of the year, which we are now gradually incorporating into our production. There will be no hard cut, but the new papers … read more
RGB colour spaces are colour systems that represent different hues with the three primary colours red, green and blue. RGB colour spaces are used in digital image processing, photography and computer technology to precisely define colours. The most important RGB colour spaces and their special features are: sRGB sRGB is the most widely used RGB colour space and is used by most monitors, printers and digital cameras. It was developed by HP and Microsoft in the 1990s to create a standard for colour representation on the internet and on various … read more
A new generation of colour measuring devices is entering the market: in contrast to the classic measuring devices, which are available as a fully encapsulated system either as a colourimeter or as a spectrophotometer, and then supply the data to a computer via an interface or app or display it directly, the new generation of colour measuring devices consist only of lighting and software, with the optics of a modern iPhone from Apple being used as the sensor. Until now, there have been two categories of measuring devices on the … read more
Peter Jäger is an expert in colour management that reliably works across the boundaries of printers and monitors, web and print – essentially: cross-media.
A few days ago Proof GmbH was the first company to be certified for proofing for the new 7C exchange colour space FOGRA55. Fogra has developed characterisation data for extended multicolour printing with the printing colours CMYKOGV – i.e. cyan, magenta, yellow, black (contrast), orange, green and violet – FOGRA55 as part of a research project over the past few years. The characterisation data and the ICC profile Ref-ECG-CMYKOGV_FOGRA55_TAC300.icc have been published on the Fogra website in recent weeks. We have now carried out the certification via GMG ColorProof, as … read more
In recent weeks, there have been lengthy discussions on the Fogra digital printing mailing list as to whether a research project should be launched to define standardised tonal value gradations for spot colours. What is this all about? In the field of CMYK and seven-colour printing, the definition of clear, printable and proofable standards is well established and has been tried and tested in practice. If the paper or paper class is known and defined, a measuring standard such as M0/M1/M2 has been established and the content of optical brighteners … read more
Offset and Newsprint ISO Coated v2 (ECI) / ISO Coated v2 300% (ECI) Profile: ISOcoated_v2_eci.icc Standard for glossy and matte coated paper Paper: Types 1 and 2, gloss and matte coated Tone value increase curves A (CMY) and B (K) as defined in ISO 12647-2:2004 Characterisation Data: FOGRA39L ISOUncoated Profile: ISOUncoated.icc Standard for uncoated white natural paper Paper: paper grade 4, uncoated white offset, dot gain curves C (CMY) and D (K) from ISO 12647-2: 2004 Characterisation Data: FOGRA29L PSOCoatedV3 / Fogra 51 Profile: PSOcoated_v3.icc The successor of ISOCoatedV2 for glossy … read more