As of August 2017, a new Fogra characterization data set and a new ECI profile for heat-set web offset printing on supercalendered SC-B paper have been made available. The characterization data set FOGRA54 and the ECI profile PSOsc-b_paper_v3_FOGRA54.icc are based on production color values and a series of test prints on a range of typical SC-B papers, assisted by the ECI Web Offset Working Group (WOWG). FOGRA54 is available for immediate download on the Fogra website (see upper left of page for download section) and PSOsc-b_paper_v3_FOGRA54.icc in the download section of the ECI website. [2017-08-28 |::| FSu]
Mainly due to paper differences, the printing condition on today's SC-B paper types no longer matches the characterization data set FOGRA40 and the profile SC paper (ECI). As a consequence, when printing on SC-B paper, printers face significant problems to achieve the ink solid aim values of FOGRA40 and the higher saturated color appearance of SC Paper proof prints. In addition new aim values, especially new dot gain curves of the international printing standard ISO12647-2:2013) are reflected in the new printing condition.
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The new tools are available for immediate download on the websites of Fogra (www.fogra.de), German Printing and Media Industries Federation (www.bvdm-online.de) and in the downloads section of the ECI.
Berlin/Munich/Wiesbaden, February 15, 2012: In the light of the established collaboration between the European Color Initiative (ECI), Fogra and the German Printing and Media Industries Federation (bvdm), the Fogra characterization database has been extended to three newly developed sets of characterization data.
While FOGRA48 addresses heat set printing on improved newsprint stock FOGRA49 and FOGRA50 cover standardized offset printing based on FOGRA39 with additional surface finishing namely matt and glossy laminated sheet-fed offset prints using OPP films.
A colour-accurate proof or softproof using e. g. FOGRA49 represents the expected result of a standardized offset print on coated paper (FOGRA39) with subsequent matte film lamination. By comparing FOGRA39-based proofs with FOGRA49 or FOGRA50, it is easy to check whether undesired colour changes must be expected (so that job data may need readjustment). For more details please refer to the documentation on the ECI web page.
As before, the printer must measure and achieve his established aim values for standardized printing on the unlaminated print (paper type 1/2, 60-80 lines/cm, TVI curve A for CMY (13%) and B (16%) for black). Production-based differences to FOGRA39 in paper white, solid coloration, and tone value increase are carried forward by lamination. Therefore it is not meaningful to use measurements on laminated prints for process control.
The new characterization data sets for offset printing with non periodic screens have been developed in a Fogra research project. Fogra realized an extensive series of test prints on coated and uncoated stock using non-periodic screening systems from several vendors. As expected, the tone value increase was significantly higher than on prints with conventional AM screening (amplitude modulated screening). For the following reasons, it is not recommended to adjust FM screened plates to the aim values used for AM screening on the respective paper types:
Therefore curve F as stipulated in the ISO 12647-2:2004 standard is the process control aim for all paper types and printing inks. The tone value increase of curve F in the mid tone (at 40%) is 28 percent.
Based on optimized aim values of the international printing standard ISO 12647-2 ECI, bvdm and Fogra recommend to use new Fogra characterization data and ECI offset profiles. The new aim values are contained in an amendment. They replace the respective provisions in the standard. The amendment to ISO 12647-2 will be officially published by ISO in January 2007 as a supplement to the standard. The changes mainly affect the aim values for the CIELAB colour coordinates of the process colour solids and the two and three colour overprints. All other provisions in ISO 12647-2 remain untouched and valid.
All the profiles are based exclusively on colour measurement against white backing. This eliminates the need to signal the type of backing (sb/bb) in the profile name, resulting in shorter new offset profile names. In line with the current status of the German ProzessStandard Offsetdruck which is based on the international standard ISO/DIS 12647-2:2003, black backing is only to be used for process control in double-side printing. There are industry standards for the qualities of white backing substrates. You can find out which types of paper are suitable as backing for standardized measurement on equipment with black measuring tables at www.fogra.org.
It was decided not to include profiles for printing with a 175 lpi screen (70/cm) as there was only a slight variation in tone value from printing with a 150 lpi screen (60/cm). The difference in colour of the 175 lpi screen caused by the slightly higher increase in tone value is less than the process-related colour variance acceptable for a print run so in order to simplify the selection of profiles, it was decided to leave out profiles for a 175 lpi screen. As a result, the profiles for the 150 lpi screen are also valid for use with a 175 lpi screeen.
Creation of profilesWe have made no changes to the program version and program settings for the creation of profiles. As before, details on how we created the profiles can be found in the relevant Info files.
The new Fogra characterization data is based on measurements that have been averaged, smoothed and adjusted in line with the desired tone value for the production prints supplied with the Altona Test Suite application kit. So as to be able to proof the colours in the profiles and reproduce them under production conditions, the most commonly used and standard-compliant types of paper and process ink standards were selected for these reference prints.
As is clear from the above, the new Fogra characterization data together with the new ECI offset profiles based upon the Fogra data constitute the best possible compromise between practical use and the precise attainment of ideal standardized aim values.
Fogra un ente senza scopo di lucro nato in Germania, con circa 900 membri in oltre 50 paesi, che conduce ricerche scientifiche nel campo delle tecnologie di stampa e delle arti grafiche, ma soprattutto esegue test e controlli di qualit dei processi e dei materiali di stampa in accordo con le norme ISO internazionali (in particolare la serie di norme ISO 12647), rilasciando uno specifico certificato in base al tipo di processo messo sotto esame. Il FograCert, comprende infatti un ampio programma standardizzato di test che mira a certificare la qualit di:
I profili colore ICC rappresentano una standardizzazione delle variabili e delle condizioni di stampa, affinch la macchina riproduca fedelmente il colore, anche su tipi di carta diversi, attraverso una procedura di conversione di informazioni. un insieme di dati numerici che normalizza in maniera uniforme e comparabile il colore tra diversi dispositivi di input/output per garantire risultati di stampa affidabili e fedeli.
Ottenere le certificazioni Fogra per le aziende vuol dire anche avviare o migliorare la standardizzazione dei propri processi di produzione e renderli il pi efficienti possibile, ridurre i rifacimenti ed i fermi macchina e aumentare le competenze tecniche del personale.
Ottenere una certificazione di questo tipo non appannaggio delle grandi aziende, ma alla portata anche delle piccole e medie imprese che intendono offrire ai propri clienti un plusvalore misurabile e dimostrabile.
Simply put - a good ICC profile provides an accurate description of the characteristics of a digital device or working colour space.
Here you'll find information on what ICC profiles are, descriptions of the basic types, explanation of why they are important to you and how they are made and used.
In the chain of capture or scan > view > edit > proof > reproduce, there may be restrictions due to equipment capability, i.e. limitations to the range of colour and tone which any specific digital device can handle capture, display or reproduce, this range is known as a device's "effective gamut". Accurate description of device gamut is one very important function of an ICC profile.
No matter how carefully devices such as display screens and printers are manufactured, there are inevitable small variations, even from the same production line. Added to this is the problem of mixing devices from different manufacturers or production lines. So each device might interpret the numbers in an image file differently and if we don't take control each device is likely to produce differing colour and tone from that intended.
Ideal working practice requires an automatic way of describing the capabilities of each digital device and a mechanism to compensate for the performance of each. With the right settings, the colour management system fulfills this need by using each device's ICC profile and its ability to unequivocally* and accurately describe device capabilities. The colour management system can now properly translate digital data between devices using those ICC profiles in order to maintain appearance, within limits of device capability, of course.
Fortunately there are many excellent measuring tools and software which allow us to make accurate ICC profiles for our various devices.
*Unequivocal / Unequivocally are vital terms in colour management, basically they mean: leaving no doubt, clear, unambiguous.
An RGB working space is a specific type of colour space, defined by its ICC profile, it is effectively the hub of many profile based conversions. A basic bit of advice, no NOT set your Adobe Photoshop RGB workingspace to your display profile (or anyone else's). Please read on - for info on the need for and reason for working colour spaces. 152ee80cbc
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