Guten Morgen,
Leider hat die Antwort von meinen Kollegen Rachid Angri von PANTONE
krankheitsbedingt etwas verzögert. Eine generelle Aussage zum Thema
Farbabstand in den unterschiedlichen PANTONE Fächern können wir leider nicht
machen, da dieser je nach Druckfarbe und Papier sehr unterschiedlich
ausfallen kann. Wir geben aber gerne etwas mehr Einblick in unseren
Qualitätssicherungsprozess.
Unter
www.askpantone.com geben wir übrigens Auskunft zu vielen häufig
gestellten Fragen wie eben auch dieser:
How much variance does Pantone allow for swatches when
printing books?
The specific tolerance standards that are used are proprietary. However, so
that you will better understand our process, I have provided the following
information.
In May of 2003, Pantone achieved ISO 9001-2000 Certification. Following are
some of our quality control procedures for all PANTONE Color Publications,
which can be found in our ISO 9001-2000 Standard Operating Procedures for
Quality Assurance:
* Base inks are checked for shade and strength. Adjustments are made until
they match our standards to +/- 2% in strength and almost no tolerance in
shade. Hue difference, saturation difference, lightness difference and total
difference are evaluated under D65 and at 10 Degree Observer using the CIE Lab
equation.
* A random sampling is made of stock from various skids of paper and checked
for uniformity of color and gloss.
* Base inks and certain blends are printed on a production press to evaluate
ink and stock. Color, gloss, quality of print, paper picking, etc., are
checked.
* During make-ready, color is matched to previous color approvals. Stored wet
ink density readings are used as a guide in evaluating all printed colors.
Before running, these matches are checked by a Quality Control Supervisor.
* During production runs, every 200th sheet is pulled and checked on a
scanning densitometer. Tolerances are set at a +/-5% deviation in density to
the standard.
* Color approvals from the new production runs are measured on a
spectrophotometer and compared to our computer-stored PANTONE Color Standards
and previous production runs. Although the spectrophotometric data is very
useful as a tool for evaluation, our final decision is always a visual color
comparison.
* Printed sheets are cut, fanned out and inspected.
Recently, Pantone has taken the next step in achieving run consistency, by
installing a scanning spectrophotometer. We are currently in the process of
building a database of wet density readings. We will be able to use this data
to compare wet densities to stored readings during the production run.
Please be assured that Pantone is committed to providing our customers with
products of the highest quality and we will continue to make improvements to
reduce color and print variations in all PANTONE Publications.
Wir hoffen diese Erklärung beantwortet die Anfrage in ausreichendem Maße.
Mit freundlichen Grüßen
Tobias Rausch Rachid Angri
X-Rite Europe GmbH Pa <<image.jpg>> ntone
Europe GmbH
Product Manager PrePress Marketing Manager Europe