February, 2012 | Proofing.de

Embed profiles for proofing? Yes or No?

May 8, 2020February 15, 2012 by Matthias Betz

The question often arises whether color profiles should be embedded in the PDF files for proofing. To answer the question, you have to get some answers: The proof should simulate the subsequent offset printing. For offset printing, with few exceptions, the imagesetters have been configured so that a 70% black in the file is displayed as 70% black on the printing plate, no matter what profile was specified in the file. It didn’t matter whether it was coated paper or uncoated paper: 70% in the file corresponded to 70% on …

Depending on the selected setting, the EAN lines in proofs are displayed smoother or less smooth. It is clearly recognizable that the modules are built up by many colours and especially within the narrow black lines a considerable increase in width takes place. Normally, a narrow black EAN bar should correspond to the width of the white space in between.

Verifiability of GTIN codes in proofing

May 8, 2020February 7, 2012 by Matthias Betz

Proofing service providers are increasingly required to be able to display “verifiable” GTIN codes, i.e. barcodes in the proof. The background to this is that especially the big german discounters like Aldi, Lidl, Hofer & Co. want to see a packaging proof from their suppliers in advance for approval. This packaging proof is not only visually assessed according to colour, but also the legibility of the printed EAN codes is evaluated using a measuring device and must meet certain criteria: Symbol contrast, modulation, decodability, defects, blemish: all this is measured …