July 2014 - colorsync-users

Re: Multiple postings
by tlabarbera 09 Jul '14

09 Jul '14

>>Graeme Gill <graeme2(a)argyllcms.com>: At the bottom of the bounce is: https://lists.apple.com/mailman/options/colorsync-users/8427890616%40sms.my… This email sent to 8427890616(a)sms.mycricket.com I don't see that in the emails I've received but it does seem to indicate that it's a (sort of) "regular" bounce message--that is via someone sub'd to the list--rather than from some (weird) nook within Apple's handling of the list...'-}} In these emails I've received, I see the following which led me to believe that the email was not from a user's ISP: "Final-Recipient: rfc822; colorsync-users(a)lists.apple.com Action: failed Status: 5.0.0" Terrie tlbtlb(a)mail.com

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White point readings - i1Pro2 vs. original
by John Lund 09 Jul '14

09 Jul '14

Hello colorsyncers, I am seeing what looks like a bug in how media white point is reported when driving my i1Pro2 with the current i1Profiler (version1.5.4). Measuring charts of the same paper twice - once with i1Pro2 (MO), then again with my original i1Pro in an iO table - the first reading reports paper white point as L*94, while the second is L*97. This pattern seems to be consistent for the several matte papers I have read lately. I don't see significant differences in the results of printing with the two profiles, but obviously this effect plays havoc with soft-proofing. A poster on the Luminous Landscape forums described similar errant readings using an i1Pro2, and claims the problem went away after reverting to i1Profiler v.1.3. Before I go to that extreme, I wanted to ask here - has anyone else seen this? Is this a bug in the current software? (seems weird that the earlier i1Pro apparently is not affected) Thanks, John JWL Images Emeryville, CA

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Multiple postings
by John Lund 09 Jul '14

09 Jul '14

Dear list mom (or whomever), Every time I post to the list, I get this auto response from system-user(a)mms.mycricket.com > Your message was not delivered successfully. > > Subject: White point readings - i1Pro2 vs. original > Sent: Mon, 07 Jul 2014 12:41:23 -0700 > > The message could not be delivered to the following recipient: > colorsync-users(a)lists.apple.com > Final-Recipient: rfc822; colorsync-users(a)lists.apple.com > Action: failed > Status: 5.0.0 …<snip>… This despite the fact my message posted successfully. Whatever is going on might explain the recent spate of multiple postings? Anyway, it would be great if this could be fixed. Thanks, John JWL Images Emeryville

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Re: Colorsync-users Digest, Vol 11, Issue 82
by Fons Put 09 Jul '14

09 Jul '14

The newer i1PRO has an XRGA-output response, meaning that it¹s white calibration and spectral output is normalized to this X-rite standard. In reading software, as Colorport and I-profiler you can declare your old instrument to behave like a new one: your measurement values are then corrected to be in order with the XRGA-response. I have not seen a solution to do it backwards (calculate from XRGA to the old GMBH-response). Fons Put VIGC On 7/8/14 9:00 PM, "colorsync-users-request(a)lists.apple.com" <colorsync-users-request(a)lists.apple.com> wrote: >Send Colorsync-users mailing list submissions to > colorsync-users(a)lists.apple.com > >To subscribe or unsubscribe via the World Wide Web, visit > https://lists.apple.com/mailman/listinfo/colorsync-users >or, via email, send a message with subject or body 'help' to > colorsync-users-request(a)lists.apple.com > >You can reach the person managing the list at > colorsync-users-owner(a)lists.apple.com > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of Colorsync-users digest..." > > >Today's Topics: > > 1. White point readings - i1Pro2 vs. original (John Lund) > 2. Multiple postings (John Lund) > 3. Re: White point readings - i1Pro2 vs. original (Graeme Gill) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Mon, 07 Jul 2014 12:41:23 -0700 >From: John Lund <john(a)jwlimages.com> >To: colorsync-users(a)lists.apple.com >Subject: White point readings - i1Pro2 vs. original >Message-ID: <9AE13F47-8153-4B73-9344-0A544176B361(a)jwlimages.com> >Content-Type: text/plain; charset=us-ascii > >Hello colorsyncers, > >I am seeing what looks like a bug in how media white point is reported >when driving my i1Pro2 with the current i1Profiler (version1.5.4). >Measuring charts of the same paper twice - once with i1Pro2 (MO), then >again with my original i1Pro in an iO table - the first reading reports >paper white point as L*94, while the second is L*97. This pattern seems >to be consistent for the several matte papers I have read lately. > >I don't see significant differences in the results of printing with the >two profiles, but obviously this effect plays havoc with soft-proofing. > >A poster on the Luminous Landscape forums described similar errant >readings using an i1Pro2, and claims the problem went away after >reverting to i1Profiler v.1.3. > >Before I go to that extreme, I wanted to ask here - has anyone else seen >this? Is this a bug in the current software? (seems weird that the >earlier i1Pro apparently is not affected) > >Thanks, > >John > >JWL Images >Emeryville, CA > > >------------------------------ > >Message: 2 >Date: Mon, 07 Jul 2014 13:21:08 -0700 >From: John Lund <john(a)jwlimages.com> >To: "colorsync-users(a)lists.apple.com" > <colorsync-users(a)lists.apple.com> >Subject: Multiple postings >Message-ID: <F40E810B-D46D-4CAB-8655-1FB67AA5BADE(a)jwlimages.com> >Content-Type: text/plain; charset=windows-1252 > >Dear list mom (or whomever), > >Every time I post to the list, I get this auto response from >system-user(a)mms.mycricket.com > >> Your message was not delivered successfully. >> >> Subject: White point readings - i1Pro2 vs. original >> Sent: Mon, 07 Jul 2014 12:41:23 -0700 >> >> The message could not be delivered to the following recipient: >> colorsync-users(a)lists.apple.com >> Final-Recipient: rfc822; colorsync-users(a)lists.apple.com >> Action: failed >> Status: 5.0.0 >Š<snip>Š > > >This despite the fact my message posted successfully. > >Whatever is going on might explain the recent spate of multiple postings? >Anyway, it would be great if this could be fixed. > >Thanks, > >John > >JWL Images >Emeryville > >------------------------------ > >Message: 3 >Date: Tue, 08 Jul 2014 11:19:46 +1000 >From: Graeme Gill <graeme2(a)argyllcms.com> >To: "colorsync-users(a)lists.apple.com >> ColorSync" > <colorsync-users(a)lists.apple.com> >Subject: Re: White point readings - i1Pro2 vs. original >Message-ID: <53BB4732.709(a)argyllcms.com> >Content-Type: text/plain; charset=ISO-8859-1 > >John Lund wrote: >> I am seeing what looks like a bug in how media white point is reported >>when driving my >> i1Pro2 with the current i1Profiler (version1.5.4). Measuring charts of >>the same paper >> twice - once with i1Pro2 (MO), then again with my original i1Pro in an >>iO table - the >> first reading reports paper white point as L*94, while the second is >>L*97. This pattern >> seems to be consistent for the several matte papers I have read lately. > >I don't see anything like that using ArgyllCMS, but then it uses a >different >instrument driver to X-Rite. > >Graeme Gill. > > >------------------------------ > >_______________________________________________ >Colorsync-users mailing list >Colorsync-users(a)lists.apple.com >https://lists.apple.com/mailman/listinfo/colorsync-users > >End of Colorsync-users Digest, Vol 11, Issue 82 >***********************************************

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mycricket ... was ... Multiple postings
by tlabarbera 08 Jul '14

08 Jul '14

>>John Lund <john(a)jwlimages.com>: Every time I post to the list, I get this auto response from system-user(a)mms.mycricket.com...<snip> ...This despite the fact my message posted successfully. I've also gotten those mycricket emails and my posts have also shown up on the list--I get the list in digest. I was going to post about it but it slipped my mind... Terrie tlbtlb(a)mail.com

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Measuring transmission diffraction grating efficiency
by Ben Goren 07 Jul '14

07 Jul '14

Can anybody here point me in the direction -- even of a textbook -- of good ways to measure the efficiency of a transmission diffraction grating? I've been trying to do it by comparing photographs of spectra from a single grating with that through a second grating. But if the second grating continues the same angular direction, the first order of the second grating perfectly overlaps the second order of the first grating. If I reverse angular direction, the spectrum gets linearly compressed to the point of becoming unusuable. I'm trying to do this on a shoestring budget -- not just for myself, but in the hopes that what I'm working on will be useful to a general audience. I'd ideally like to limit equipment to the sorts of things a photographer is already likely to have (such as a camera or a photographic light meter) or that you can cheaply buy at an art supply or hardware store or online, plus a typical graphic arts spectrophotometer (presumably not a colorimeter) such as the i1 or ColorMunki. The grating in question is cut from one of those 6" x 12" "novelty" plastic sheet gratings that, for example, Edmund Optics sells for $5 / each. The ideal end result would be a lookup table (or other function) that can be used to "idealize" the diffraction grating -- that is, take measurements, multiply the results by the factor in the table for the wavelength (or do whatever), and get what the measurements would have been if the grating were 100% efficient. High precision and resolution aren't necessary. The same sorts of tolerances used in graphic arts are fine. I'd like to get to ~3 nm and ~1%, but 10 nm and 5% would probably be "good enough." The setup I currently have clearly shows the separation between the sodium 577 / 579 doublet, which I'm sure is overkill. And, if this isn't the sort of thing that's practical to do without an expensive optical bench setup, I'd be interested in pointers to how to find somebody with such a setup. But I really would like to do it myself, if only for the same reasons kids do science fair projects.... Thanks much, b& P.S. After giving up on the transmission grating a while back, I spent a bunch of time trying to use a CD as a reflection grating. But I finally got to the point today that I could take pictures "for real"...and the rotary nature of the grating just causes much too much distortion. Thus, the circling back to the transmission grating. b& P.P.S. If a prism would be a better bet than a grating, I'm willing to go that route, too...but the ones I've played around with haven't had much dispersion. b&

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Re: Colorsync-users Digest, Vol 11, Issue 79
by Rob Griffith 03 Jul '14

03 Jul '14

Hi Thom I agree with Edmund. ACPU just doesn't work well with CMYK tiffs. If you are profiling an Epson through the driver you need to make an RGB printer profile. Regards Rob Griffith The Colour Collective Ltd. www.colourcollective.co.uk Phone: 01926 316447 Mobile: 07930 747838 Linked In: http://uk.linkedin.com/pub/rob-griffith/16/b1b/373 On 2 Jul 2014, at 20:00, colorsync-users-request(a)lists.apple.com wrote: > > Message: 1 > Date: Tue, 01 Jul 2014 15:08:13 -0700 > From: Thom Schroeder <tschroe(a)rei.com> > > I actually want to print a profiling target on a new Epson 9890 and – having only Photoshop CS5 and CS6 – it seems the viable option is to use ACPU. I've done so successfully in the past when I only had CS5 installed (and I'd guess 10.6.something) - but trying it now yields only a blank piece of paper. I've tried on two different machines (same specs on each) with the same result – a blank printout. ACPU indeed opens and displays the TIF (ECI2002CMYK i1_iO_1_2.tif), but rendering a preview (and opening in Preview) from the OS print dialog box in ACPU then also shows just a blank sheet. > > Any suggestions/workarounds? It's admittedly been awhile since I've had to profile a printer and I'm a bit rusty on the updated protocol (if there is such a thing in color management – updated protocols that is hehe… ). > > Cheers! > _thom >

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Adobe Color Printer Utility (ACPU) - Mac 10.8.5
by Thom Schroeder 01 Jul '14

01 Jul '14

I actually want to print a profiling target on a new Epson 9890 and – having only Photoshop CS5 and CS6 – it seems the viable option is to use ACPU. I've done so successfully in the past when I only had CS5 installed (and I'd guess 10.6.something) - but trying it now yields only a blank piece of paper. I've tried on two different machines (same specs on each) with the same result – a blank printout. ACPU indeed opens and displays the TIF (ECI2002CMYK i1_iO_1_2.tif), but rendering a preview (and opening in Preview) from the OS print dialog box in ACPU then also shows just a blank sheet. Any suggestions/workarounds? It's admittedly been awhile since I've had to profile a printer and I'm a bit rusty on the updated protocol (if there is such a thing in color management – updated protocols that is hehe… ). Cheers! _thom --- thom schroeder | marketing premedia | o: 253.437.8366

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