From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/51651 Path: news.gmane.org!not-for-mail From: William Adams Newsgroups: gmane.comp.tex.context Subject: Re: Duotones with spot colors Date: Tue, 7 Jul 2009 10:36:06 -0400 Message-ID: References: Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 (Apple Message framework v935.3) Content-Type: text/plain; charset="us-ascii"; Format="flowed"; DelSp="yes" Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1246977436 7303 80.91.229.12 (7 Jul 2009 14:37:16 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 7 Jul 2009 14:37:16 +0000 (UTC) To: mailing list for ConTeXt users Original-X-From: ntg-context-bounces@ntg.nl Tue Jul 07 16:37:02 2009 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from ronja.vet.uu.nl ([131.211.172.88] helo=ronja.ntg.nl) by lo.gmane.org with esmtp (Exim 4.50) id 1MOBn4-0004FG-ES for gctc-ntg-context-518@m.gmane.org; Tue, 07 Jul 2009 16:37:02 +0200 Original-Received: from localhost (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id E96221FB1D; Tue, 7 Jul 2009 16:37:00 +0200 (CEST) Original-Received: from ronja.ntg.nl ([127.0.0.1]) by localhost (smtp.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 05047-01; Tue, 7 Jul 2009 16:36:27 +0200 (CEST) Original-Received: from ronja.vet.uu.nl (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id A98041FADC; Tue, 7 Jul 2009 16:36:27 +0200 (CEST) Original-Received: from localhost (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id 98A371FADC for ; Tue, 7 Jul 2009 16:36:25 +0200 (CEST) Original-Received: from ronja.ntg.nl ([127.0.0.1]) by localhost (smtp.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 04896-02-3 for ; Tue, 7 Jul 2009 16:36:15 +0200 (CEST) Original-Received: from filter4-til.mf.surf.net (filter4-til.mf.surf.net [194.171.167.220]) by ronja.ntg.nl (Postfix) with ESMTP id 6FAD51FAD7 for ; Tue, 7 Jul 2009 16:36:15 +0200 (CEST) Original-Received: from ares.frycomm.com (ares.frycomm.com [65.167.125.8]) by filter4-til.mf.surf.net (8.13.8/8.13.8/Debian-3) with ESMTP id n67Ea7N7006498 for ; Tue, 7 Jul 2009 16:36:14 +0200 Original-Received: from [192.168.21.139] (charon.frycomm.com [65.167.125.1]) by ares.frycomm.com (Switch-3.1.8/Switch-3.1.7) with ESMTP id n67Ea6Ep016702 for ; Tue, 7 Jul 2009 10:36:07 -0400 (EDT) In-Reply-To: X-Mailer: Apple Mail (2.935.3) X-Bayes-Prob: 0.0001 (Score 0, tokens from: @@RPTN) X-CanIt-Geo: ip=65.167.125.8; country=US; region=PA; city=Mechanicsburg; latitude=40.2134; longitude=-77.0098; metrocode=566; areacode=717; http://maps.google.com/maps?q=40.2134,-77.0098&z=6 X-CanItPRO-Stream: uu:ntg-context@ntg.nl (inherits from uu:default, base:default) X-Canit-Stats-ID: 257056418 - c2c393d52495 - 20090707 X-Scanned-By: CanIt (www . roaringpenguin . com) on 194.171.167.220 X-Virus-Scanned: amavisd-new at ntg.nl X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.11 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: ntg-context-bounces@ntg.nl Errors-To: ntg-context-bounces@ntg.nl X-Virus-Scanned: amavisd-new at ntg.nl Xref: news.gmane.org gmane.comp.tex.context:51651 Archived-At: On Jul 7, 2009, at 9:50 AM, Piotr Kopszak wrote: > I am preparing for a next project which will be printed in two > colours. Obviously, perfect opportunity to use duotones. However I got > my duotone illustrations in CMYK tiffs with images in yellow and black > channels. Obviously black could stay but I would like to convert the > yellow channel to the spot colour I am going to use. Any ideas > (without using Photoshop) ? Leave the images be, set the things you want to appear in the spot colour as yellow, then tell the printer that the yellow plate is the spot colour and to suppress cyan and magenta. Or use the spot colour and tell the printer to merge the yellow plate w/ the spot colour (check first --- while all RIPs should be able to do this, not all printers will be willing to). Or use Enfocus PitStop to post-process the .pdf. However, unless the spot colour is _very_ light, I doubt that you'll be able to use the images as is --- they'll probably print too dark, so you'll need to process them anyway. I'd make a PhotoShop action to convert the images to multi-channel, then change the yellow plate to the spot colour, then apply a curve to lighten the spot colour, then save the image (but make sure you keep an original), then I'd use a second action to review all of the files on a calibrated monitor, tweaking as necessary and going back to original images at need. William -- William Adams senior graphic designer Fry Communications Sphinx of black quartz, judge my vow. ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________