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GRAFOSTIL WIKI

Prepress

  • General guidelines Colour specifications Document naming convention Fonts Use of images Proofs


Print

Quality

Typical Mistakes

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Revision 20 as of 2018-02-13 16:01:35
  • Quality

Quality

Sometime is very hard to explain is it product printed well.

Quality becomes measurable, verifiable and reproducable!

Our quality control is based on industrial standard which is based on measurement.

Typical cases

Customer supply digital files.

We make digital proof and send to customer. If customer is not satisified with proof he do rework na supply own profs with our printing conditions, according ISO 12647-2:2013 Fogra PSO and BVDM

Proof must be valid and to have all elements required ISO 12647-7:2016, Fogra PSO and BVDM.

  • Fogra MW 3
  • Job ticket
  • Measurement
  • Result in tolerances

In this case product will be printed according ISO 12647-2:2013

Customer Supply printed samples

We are happy to see your printed product, but we must warn you that we dont know how is product prined before.

It's too optimistic to expect to make reprint of unknown printing condition.

Some of few reason is

  • uknown paper
  • unknown ink
  • uknown press linearisation

Also it's impossible to compare 10.000 printed book with one sample.

During print run there is fluctuation some of them are visible some not.

In this case product will be printed according ISO 12647-2:2013

Customer approve on press

On first sight it's best sollution. Customer immidiately see on press result.

Unortunatelly this is worst case. Ink during drying change his optical characteristic and real color appereance is achieved after 2-3 days after printing. We can't speak anymore about quality and repeatibility.

After that nobody, even we can't do reprint of you product. In case of some mistakes in finishing, or different batches of ink's we can't repeat job.

In this case product will be printed according ISO 12647-2:2013

Lamination

It's well known phenomenon that printed sheets change appereance after lamination. It's very hard to predict color changes.

Influnce of this changes is lamination thickness, vendor, batch, ink color, ink thickness, ink drying, ink batch, paper.

It's impossible to achieve 100% acuracy. Customer must to accept this variation.

We heard that some printer/customer takes wet sheets, make lamination and adjust ink thickness on the press.

This is big hoax and misleding of customers. We don't sell snake oil.

With all god will, and technology we use we can't predict what will happen.

Usualy because of diffuse effect with glossy lamination, intensive color appear darker.

With matt lamination we have oposite effect, intensive color appear lighter.

In this case unlaminated product will be printed according ISO 12647-2:2013 ISO 12647-2:2013

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