You must have the client re-output the pdf's with an rgb color format. Trying to convert CMYK back to rgb, is next to impossible. I have tried to do this with poor results. Remember there is also a difference between reflective color and transmission color that makes the matching process even tougher.
Try this... Take the printed color in hand, and hold it up to the screen and match the color as best you can. Now turn on some more lights in the room. See how the swatch does not match the screen any more? Sorry to add further complications, but it is a reality in matching print to video, and vice versa. Best Regards, * Stephen P. Davidson* *(954) 552-7956* sdavid...@3danimationmagic.com *Any sufficiently advanced technology is indistinguishable from magic* - Arthur C. Clarke <http://www.3danimationmagic.com/> On Tue, Feb 9, 2016 at 2:29 PM Sebastien Sterling < sebastien.sterl...@gmail.com> wrote: > Basically the client wants a pack shot of thirty or so products, so we > need to model them up and texture them. > > In order to texture them the client sent the original packaging files in > .pdf format, but these where originally destined for print and so they are > CMYK. > > the colors are off, it is most noticeable in the blacks, as they have all > shifted to ultramarine blue. > > I don't know how to fix this, it is pretty baffling, :( > > On 9 February 2016 at 19:19, Rob Chapman <tekano....@gmail.com> wrote: > >> aah was part of the DTP revolution first time around with Aldus >> products... So I remember a bit about conversion having to get renders to >> the printers sometimes and being very disappointed with the blue greys :) >> >> firstly this may help >> >> >> >> >> and may explain why the colors changed. some colors simply do not fit >> between gamuts and will change regardless. >> >> so you have the CMYK plates and have to match in RGB to render and then >> convert back to CMYK again? oof. have you tried regenerating in photoshop >> from the separate CMYK and they match the printers provided RGB 0utput? >> >> Photoshop LAB color mode was invented for this no? better off starting >> with something super wide gamut really depends on what the printer is using >> to convert to RGB with or originally sourced from and what printer profiles >> etc eg is it coated or glossy paper , all that palava. >> >> if its one specific pantone color or a few then you are in luck as you >> can just render mattes like Mr Wuijster suggested and the printer can >> easily spot color these. >> >> good luck matching anything RGB with a printer tho...! >> >> >> >> On 9 February 2016 at 18:49, Rob Wuijster <r...@casema.nl> wrote: >> >>> It's not possible, unless you have the exact profile for the printer it >>> was finalized for. >>> And it's weird that black is ultramarine blue in your files. >>> >>> Just have them give you RGB's, or give them a ton of mattes so they can >>> color correct the shit out of it again. >>> >>> That's what normally happens over here, as the Photoshop guys seem to >>> like that workflow ;-) >>> >>> Rob >>> >>> \/-------------\/----------------\/ >>> >>> On 9-2-2016 19:35, Sebastien Sterling wrote: >>> >>> Trouble is here what i hace is in CMYK from the printers and already >>> decolored, what should be black if ultramarine blue, am looking or a way to >>> convert these images back to sRGB and back to what they should look like. >>> there are lots of tutoriels on how to move from sRGB to CMYK but none for >>> the reverse. or how to color correct it. >>> >>> On 9 February 2016 at 18:27, Sven Constable <sixsi_l...@imagefront.de> >>> wrote: >>> >>>> CMYK generally is not very well suited for 3d because rendering itself >>>> is RGB. When you convert textures in PS from CMYK to RGB I would use >>>> 'relative colormetric' (color settings->conversion options). >>>> >>>> >>>> >>>> sven >>>> >>>> >>>> >>>> *From:* softimage-boun...@listproc.autodesk.com [mailto: >>>> softimage-boun...@listproc.autodesk.com] *On Behalf Of *Sebastien >>>> Sterling >>>> *Sent:* Tuesday, February 09, 2016 7:13 PM >>>> *To:* softimage@listproc.autodesk.com >>>> *Subject:* Softimage and CMYK >>>> >>>> >>>> >>>> Hey list, am working on a job with package assets art in CMYK. Soft >>>> won't display them. >>>> >>>> Does softimage not support CMYK ? >>>> >>>> Also, when you move from srgb to CMYK in photoshop there is a color >>>> shift. >>>> >>>> is it possible to reverse this process ? >>>> >>>> Sorry for weird noobie questions, am not accustom to working with CMYK >>>> in production. >>>> >>>> is weird. >>>> >>> >>> Geen virus gevonden in dit bericht. >>> Gecontroleerd door AVG - www.avg.com >>> Versie: 2016.0.7357 / Virusdatabase: 4522/11592 - datum van uitgifte: >>> 02/09/16 >>> >>> >>> >> >
