Hi Mike, I assume that you're talking only about ony imitating the uncoated substrate color and not its lower contrast and saturation. Of course you can do this by editng the white point of the destination color space. But perhaps the goal is unclear to me. Normally one would expect the show-thorough of a warmer (and or darker) stock to influence lighter colors and accept it as a given. The eye takes its cue from the paper white (assuming some paper is visible), so all colors are seen in relation to it. If, on the other hand, the customer is asking for the colors to match in absolute rather than paper-relative terms you have a problem that can't be simply edited away--certainly not for very light colors. Any such attempt would risk some nasty tonal breaks in highlight areas, as the correction would be of increasing severity as coverage decreases to zero. In an inket proofer we would just apply absolute rendering to lay down a correcting tint to the paper white as well, and this is usually accepted, but anything like this on a press sheet would just be seen as scum dot. MIke
Message: 1 Date: Fri, 14 Aug 2015 07:53:21 -0500 From: Mike Stewart <mstewart@embassygraphics.com> To: colorsync-users <colorsync-users@lists.apple.com> Subject: Device Link or other workflow Message-ID: <CAFB95ouQkT6ZCOC8EDEnh8W5tXwSv4mU-2zcmUb1n-TP5xmgrA@mail.gmail.com> Content-Type: text/plain; charset=UTF-8
Flat tints (ex: 10% Cyan) printing on offset press using a coated stock that falls within SWOP3 (#3 paper) characteristics and the same tint printing on heavily optically brightened uncoated stock will and do look completely different. In the coated printing the 10% cyan looks very yellow compared to the uncoated printing. Customer wants the uncoated printing to look like the coated printing. All I can do at this point is add yellow into the 10% cyan tint; create new CTP and hopefully the uncoated printing will be a better visual match.
I'm not too up on Device Link profiles or software to create Device Links; but is there a way to adjust the output files to compensate for this type of situation without having to manually colour correct each and every image? I have to make the adjustment yet keep the initial files intact (as the customer may repurpose or reprint at a later date) and just create a file that can be printed to better match each other in the situation I have mentioned.
Thanks - Mike Stewart