Technical specifications of SandyStar

The QM printing element SandyStar is comprised of asymmetric geometries and fulfils the criteria of SandyScreen's philosophy that has hitherto been successfully applied by SandyScreen, namely.

Through the adoption of the parameters of the different product variants in the gradation curves that have been specially coordinated with these, the specific requirements of the individual print products can be adjusted with SandyStar in a targeted and ideal manner.

The parameters of print, paper, colour, exposure units and plate are thus coordinated with one another and depicted in the RIP with the evaluated gradation curve so that you can retain your normal production procedure (but with considerably enhanced quality).

SandyStar

• optimal light and shadow detail
• no dot closure up to 99%
• no loss of colour shades compared with the original data supplied, thus guaranteeing optimal rendering of the original in the print reproduction
• The plate repeatability is x-times absolutely identical and shows no shifts in tonal value.

Technical specifications of SandyProfessional

SandyProfessional beinhaltet 2 ausgeprägte Neuheiten:

The typical problems of newspaper images are: Too much dot gain, visually obtrusive rosettes and moiré, missing details in shadow and light areas. A fundamental problem in newspaper printing is the coarse screen ruling that is used in order to be able to print at very high speeds.

If a finer ruling is used, dot gain increases. If dot gain is compensated for by lowering the tonal transfer curve, the photos lose contrast and detail. At the same time the darker areas become plugged, resulting in loss of shadow detail. Further problems create the abrupt tonal changes that can be seen at the point where halftone dots first touch each other. In normal diagonal screens, this happens in the scale of 50 percent.

The resulting jumps in flesh tones are particularly annoying in portraits (ads for cosmetica or photos in the editorial sections). Screen comparisons: The SandyProfessional screen geometry shows two distinctive differentiations. Instead of a diagonally running raster, SandyProfessional elements are arranged vertically and horizontally. This arrangement plus the particular dot shape make the dots touch each other at a screen value above 90 %. This results in improved newspaper photo quality in almost every respect.

SandyProfessional