Hi So this is not the case which I experienced, but what I think is worth to consider is that some printers receive RGB only and internally do cmy(k) separations. I hope this is not yours case. Best regards On 7 kwietnia 2014 08:44:36 CEST, Stalis Man <stalis_man@xxxxxxxxxxx> wrote: >Hi Kryzysztof, > >I am writing a little tool to take CMY encoded Tiff files and convert >them to a file that I can send direct to the printer via USB bypassing >its usual driver. > >So I have no RGB in my work flow. > >Best Regards > >Stali > > > >Subject: [argyllcms] Re: Rendering Intents >From: k2mil@xxxxxxxxxxxxxx >Date: Fri, 4 Apr 2014 13:11:31 +0200 >To: argyllcms@xxxxxxxxxxxxx > >IMHO you have a RGB printer. I experienced the same symptoms in the >past. > >Best regards > >Krzysztof > >On 4 kwietnia 2014 11:47:10 CEST, Stalis Man <stalis_man@xxxxxxxxxxx> >wrote: > > > > > >> Date: Fri, 4 Apr 2014 16:28:15 +1100 >> From: graeme@xxxxxxxxxxxxx >> To: argyllcms@xxxxxxxxxxxxx >> Subject: [argyllcms] Re: Rendering Intents >> >> Stalis Man wrote: >> >> Hi, >> >> > collink -v -qh -i s -g srgb.icc cmy190214_SP.icm >sRGBcmy190214_s.icm >> > for a saturated intent. >> >> > I am profiling a printer with just C, M and Y hence I >> > made the cmy190214_SP.icm profile without any K at all with: >> >> > colprof -v -qh -kz -l300 -iD50 -nP -nS -S srgb.icc cmy090114. >> >> So the printer is defined to be CMY space ? If so, the -kz doesn't >> apply - there is no K ink. >> >> Or do you mean that you have profiled it as a CMYK printer ? >> If so, -kz is not guaranteed to give you zero K ink, it just gives >> you the minimum possible that achieves the ta > rget >colors. >> >> > I printed of the standard colour checker card I was >> > surprised that the perceptual intent looked rather 'smokey' >compared to the >> > Saturated intent whilst the Relative looked too brown compared to >the Absolute. >> >> It's not possible to comment without knowing the source of the image >file, >> the workflow used to print it, or be able to see the result. >> >> > As a result folks seem to prefer the saturated intent whilst >> > I had expected the Perceptual to be the one they would want. Their >choice is >> > down to the general darkening of the perceptual. >> >> Naturally people prefer "pop" if they see it in isolation and want >impact. >> "pop" is not accuracy though. >> >> > Is the perceptual being smokey/ darkened to be expected or >> > have I dropped an obvious clanger. >> >> Check what > you >mean by CMY. To profile in CMY you need to create a CMY >> chart and print with just CMY. >> >> Graeme Gill. >> >> Thanks for your response Graeme. I'll clarify. I am profiling a >CMY printer and I did create and measure a CMY chart. I used the -kz >because I wasn't sure how things worked internally, I'll retry without >it. It's CMY because I am using dyefilm which doesn't support K. >Regarding the 'smokiness' it is a very subjective term to use. What I >was trying to explain was that having created a device link with a >perceptual intent and another with an absolute intent that the Yellows >looked quite different although within gamut. Absolute was fine whilst >Perceptual looked as if I were looking through a dirty window. Maybe I >am expecting too much? I understand that perceptual is supposed to be >more pleasing to photographers but this f > rom a >large gamut to a smaller gamut is decidedly not. I'll look at the D65 >/ D50 missmatch. Best Regards Stali > > > >-- > >Wysłane za pomocą K-9 Mail. -- Wysłane za pomocą K-9 Mail.