DLS - DeviceLinkSets
Advantages of DeviceLink Sets at a glance:
DeviceLink profiles complement the use of normal ICC profiles, making it possible to specifically circumvent the weaknesses of color conversion based on an ICC profile for certain tasks. The main fields of application are transformation from CMYK to CMYK, and tailor-made conversion or optimization for highly specific purposes. We offer specially compiled, high-quality profile sets for a number of standard tasks and printing conditions (ISO standards, USA standards, newspaper standards, gravure standards, etc.). These profile sets are designed for color conversion from one standard to another, and at the same time permit targeted limitation of the total amount of color, as well as ink optimization.
Specially compiled, high-end color conversion profile sets
ColorLogic offers interested system integrators and suppliers of workflow, RIP and color management solutions the possibility of licensing and integrating pre-calculated, manually optimized DeviceLink profiles for international printing standards. Users can purchase these profile sets, known as "DeviceLink Sets" (DLS), from our distributors. There is additionally the option of encrypting profiles in order to use them as demo profiles or to ensure that they only work correctly in a specific environment.
Applications for DeviceLink profiles
DeviceLink profiles complement the use of normal ICC profiles. For certain tasks, they produce substantially better results in terms of both quality and the printing process when converting and adapting colors, thus making it possible to specifically circumvent a number of the weaknesses otherwise encountered during color conversion based on an ICC profile. The principal application of DeviceLink profiles is the transformation of "separated" CMYK data to a different CMYK. In this case, either the original separation can be deliberately preserved, or the data can be specifically "reseparated". Practical examples calling for separation-preserving profiles would be adaptation to different papers and printing processes, or limitation of the total amount of color. The aim of reseparation can be to harmonize different separations or to use more black in order to stabilize the printing process and/or save ink.
However, the use of DeviceLink profiles is not limited to CMYK. They also have benefits when converting from CMYK to Grayscale owing to the preservation of 100% black, which would not be possible with normal ICC profiles. DeviceLink technology also offers attractive, new approaches to quality optimization, especially for RGB-to-RGB or RGB-to-CMYK and CMYK-to-MultiColor conversion. The impressive result: pure, highly saturated colors and the same color appearance as for example the original RGB data - in diverse printing processes and using papers with a wide variety of paper shades.
Standard DeviceLink profiles are available for the following applications:
- Limiting the total amount of color (TAC) for various printing standards,
e.g. ISO, Fogra, ECI, Ifra, Gravure (PSR), GRACoL, SWOP, SNAP.
- Optimized color conversion between different printing standards
These color conversions preserve separations, limit the TAC in accordance with the selected printing standard, and preserve the purity of primary and secondary colors. They ensure smooth transitions in vignettes and permit correct transformation of PDF files. Preserving the separations during conversion guarantees that pure gray tones are not subsequently composed of four colors, and that duplex colors (black + primary color) and triplex colors (black + secondary color) remain pure, their colors nevertheless being optimally transformed in colorimetric terms. In addition, the color appearance of the source color space is optimally preserved in the target color space, because both the paper color and the dot gain are taken into account.
- Ink reduction (SaveInk)
The ColorLogic DeviceLink profiles for ink reduction preserve the separation characteristics while at the same time replacing CMY with black. This leads to far better transformation than classical ICC-based conversion with strong GCR. There are SaveInk profiles for three different intensity levels. The first level optimizes the data for a long, narrow black and is designed to stabilize the printing process and harmonize the separations on a forme. The second level targets good ink saving and the best possible printing characteristics. The third level focuses on maximum ink reduction, but presupposes that the press is perfectly set for the respective printing standard, and that the densities are not varied during printing.
- CMYK-to-Grayscale conversion profiles
When converting CMYK data to Grayscale using ICC printer profiles, a tone composed of pure, 100% black - such as black text - cannot remain 100% black owing to the architecture of the profiles. Instead, it is converted to 95%, for example, depending on the printing process involved. On the press, this leads to rasterizing and thus to unsharp printing results. The CMYK-to-Grayscale DeviceLink Sets retain 100% black.
- RGB-to-CMYK separation profiles
Depending on the quality of the printer profile used, conversion from AdobeRGB, sRGB or eciRGB_V2 to the various printing standards can give rise to annoying artifacts in some areas. For instance, smooth RGB vignettes often have a much less smooth structure after conversion to CMYK, highly saturated RGB colors lose their saturation, and losses of definition may also occur, depending on the rendering intent used. Even if top-quality printer profiles are used, vignettes in RGB primary and secondary colors cannot be transformed into pure CMYK primary and secondary colors after conversion. The ColorLogic separation DeviceLink profiles are optimized for conversion of AdobeRGB, sRGB and eciRGB_V2, meaning that the above problems are avoided. In addition, the special ColorLogic rendering intents optimally preserve the color appearance of the original RGB data in the target color space by taking both the paper color and the dot gain into account.
Dynamic creation of DeviceLink profiles
The ColorLogic CrossXColor-CMM permits dynamic creation of DeviceLink profiles, taking various factors into account, such as preservation of the separation characteristics, limitation of the TAC, preservation of pure colors, and simultaneous dynamic gamut mapping. This makes it possible for system integrators to offer their customers special color conversions that specifically address problems in the graphic arts industry, together with other workflow solutions.