Re: PDF, spot colors,RIPs, and ink jet printers
Re: PDF, spot colors,RIPs, and ink jet printers
- Subject: Re: PDF, spot colors,RIPs, and ink jet printers
- From: Scott Martin <email@hidden>
- Date: Fri, 24 Aug 2012 09:08:48 -0500
I have found the big challenge to PDF workflows is getting the designers to make excellent, bullet-proof PDFs that won't have problems further down the line. There are too many ways to make PDFs that will have problems and not enough education about how to make excellent PDFs. I do a fair amount of print vender/client integration consulting so I spend a lot of time educating designers on this and now strongly encourage them to do their own, in-house proofing from said PDFs before sending files out to their print vendor. Doing so causes all sorts of problems at first, which illustrates to them the importance of getting it right. Once they are able to make excellent SWOP, GRACoL or custom certifiable inkjet proofs in-house, they send out their PDFs to their print vendor with a level of confidence they didn't have before. The net result is that the print vendors love these designers and their files print quickly without incident. Spot colors and transparency are not a problem as long as the source files and PDFs are generated properly. As you can imagine, flattening transparency in the PDF is a big part of this!
Scott Martin
precise color and workflow training
http://www.on-sight.com/
On Aug 24, 2012, at 8:27 AM, Steve Miller wrote:
> I've been doing some research with PDF files and RIPs. We want to have a
> PDF only workflow and one RIP vender is saying we should not use PDF
> files. Instead, they recommend .eps, .tif or .jpg.
> Here's a reply from one RIP vender.
>
> "The pdf print engine is implemented as a base feature in the" (enter any
> vender name here) " RIP programs. It has advanced handling of pdf and pdfx
> file formats. It was necessary for" (enter any vender name here) "to add
> this feature due to Adobe's constant alteration of the pdf encoding
> process and handling of transparencies, spot color handling in gradients,
> and compression methods. There is a basic flaw in the conversion of spot
> color in the pdf format to the rastered ink dots of an inkjet printer.
> This is a problem that all RIPs have.. It is a problem inherent in the pdf
> format being rendered into the inkjet dot format. The repeat printability
> of colors suffers in this format. While Adobe also alters the EPS format,
> color consistency from print to print is stable."
>
> Is this a true statement?
>
> --
> Steve Miller
> Color Management Specialist
>
> "Quality Begins Here"
>
> BIC Advertising & Promotional Products
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> Sleepy Eye, MN 56085
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>
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