Proofing.de

Standardized light and metamerism effect

May 8, 2020January 26, 2012 by Matthias Betz

A proof is only as good as the light under which it is viewed. Just going to the window or switching on the light at dusk is useless: between December and July, between 8 am and 8 pm, between cloudy and sunny days there is a huge difference in the lighting, which makes any colour evaluation impossible. And if you switch on the light, you normally switch on a bulb with 2700 Kelvin – or even worse: an energy-saving neon bulb that somehow shines in any spectra… a disaster! The …

Ugra Fogra-MediaWedge V3.0 and measuring protocol

What is the UGRA-Fogra Media Wedge 3.0 used for?

May 8, 2020January 25, 2012 by Matthias Betz

Every print shop in Germany adheres to a predefined standard, the process standard offset printing. This standard defines target and tolerance values for printed products. In order to prove that your proof delivered to the print shop meets these standards or is within the tolerances, the media wedge is measured and the values analysed in case of doubt – i.e. in case of a streak. If these measured values are correct, the print shop is obliged to adhere to and achieve these values. Practice generally shows the following: If you …

How colour-accurate are proofs?

May 8, 2020January 25, 2012 by Matthias Betz

A proof is prepared according to the currently valid ISO standard 12647-7 and is legally binding with a UGRA-Fogra media wedge and measurement report. How does this check work? If you need a proof with UGRA/Fogra Media Wedge CMYK V3.0, there are two ways to add the test report to your data. With proofing devices in which a measuring device is integrated, the media wedge with 3×24 standardised colour fields is printed directly under the proof data. This media wedge is driven directly in the proofing device to a kind …