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: Roger Breton <email@hidden>
- Date: Fri, 24 Aug 2012 18:23:28 -0400
Steve,
Where does color management take place? In the RIP? Or in the workflow? Is
the RIP getting "raw" DeviceCMYK and apply some kind of conversion on
output, or is the RIP receiving already managed pages, and therefore only
apply some kind of linearization or calibration to the Data?
My experience is that, if plain DeviceCMYK is sent to the RIP, and the RIP
is color-smart like an ORIS ColorTuner then, no harm can happen to the data.
It depends where color management take place in your process. But printing
to an inkjet printer is pretty fool-proof these days.
Best / Roger
-----Original Message-----
From: colorsync-users-bounces+graxx=email@hidden
[mailto:colorsync-users-bounces+graxx=email@hidden] On
Behalf Of Steve Miller
Sent: August-24-12 10:07 AM
To: email@hidden
Subject: Re: PDF, spot colors,RIPs, and ink jet printers
In this workflow, the ink jet printer is the final destination. So the PDF
files would be printed to the ink jet printer through a APPE enabled color
managed RIP.
Therefore, no plates, no ink saving software, etc... Just PDF to RIP to ink
jet.
--
Steve Miller
Color Management Specialist
"Quality Begins Here"
BIC Advertising & Promotional Products
1000 3rd Ave. SW
Sleepy Eye, MN 56085
Tel.: (1) 507 794 8203
E-mail: email@hidden
www.norwood.com / www.bicgraphic.com
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On 24/08/2012 8:53, "Roger Breton" <email@hidden> wrote:
>It is true that transparency, gradients aka smooth shading and spot
>colors are a PDF workflow's Achile heel.
>Short of having a permanent solution, the best bet is to avoid freely
>mixing those elements on a page.
>Even if a smart preflight program was to catch these elements in a PDF,
>it would probably be on the 11th hour and there would be very little
>time left for making design changes.
>
>The business of handling PDFs with these elements is not a problem in
>itself IMO. The problem begins when reseparating images and graphics
>for the purpose of matching a press condition or to save ink. There,
>anything can happen and will happen.
>
>Everybody likes PDF and it is here to stay. In most instances, it works.
>Like 99.8% of the time, which isn't bad in itself. The rest of the
>time, issues have to be caught before making plates. At the quantity of
>pages that go through a typical workflow, no one can give 100%
>assurance that everything will go through smoothly, all the time. But
>everybody strives for 100%.
>
>Best / Roger Breton
>
>-----Original Message-----
>From: colorsync-users-bounces+graxx=email@hidden
>[mailto:colorsync-users-bounces+graxx=email@hidden] On
>Behalf Of Marc Sitkin
>Sent: August-24-12 9:34 AM
>To: email@hidden
>Subject: Re: PDF, spot colors,RIPs, and ink jet printers
>
>We've had terrible results printing any pdf via a RIP if transparency
>and spot color was involved. The explanation from out RIP vendor was
>that the problem was a result of the conversion process differing from
>Adobe's color engine. We've had to RIP files to tiff in photoshop first
>as a workaround.
>
>On 8/24/2012 9:27 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?
>>
>
>Regards,
>
>--
>Marc Sitkin
>
>NEW ADDRESS!
>
>digitalmomentum,llc
>1700 NW 15th Ave
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>Pompano Beach, FL 33069
>
>954-973-2670 phone
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>
>web site:
>www.digitalmomentum.com
>
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