Mark McCormick

Lives in United States MA, United States
Works as a Imaging Scientist
Has a website at www.aardenburg-imaging.com
Joined on Aug 19, 2004
About me:

Photography has been my lifelong interest. Digital color management, fine art
printmaking, photographic conservation, and personal family archives are my chosen
areas of expertise.

Mark McCormick's recent activity

  • And the issue with annecdotal testing like you describe is that we have no idea what inks you actually tested nor anything about your environmental conditions (temperature, humidity, average light ...
  • AirPrint may work as intended for the target market when using Mac IOS devices like iPads and iPhones, I don't know since I haven't tried it. But it's a mess on Mac OS (as of OS 10.14.6 Mojave), ...
  • From earlier comments you've made about the G550, I have real doubts that this printer can be profiled properly. Are you seeing these scum dots in the pure white (RGB = 255,255,255) patch of your ...
  • Replied in G550 too
    Make it 4 to 6 months in a south facing window (if you live in the northern hemisphere). Then the accumulated exposure dose starts to become significant. Then there's something to discuss with ...
  • i1P has a preset called "colorful" It pushes both the contrast setting to +40 and the saturation setting to +40. And yes, one gets a profiles with a more "vivid" response, but it comes at the ...
  • Yes, there is an overall tone reproduction curve (TRC) "baked" into an ICC profile, but it's a function of various factors: 1) dynamic range of the media, i.e. L*min to L*max, 2) choice of ...
  • It probably adds a little ozone protection but not a particularly significant amount. However, being a pigmented ink set, Canon's Lucia Pro inks that have the GO channel are reasonably resistant ...
  • Adobe Color Printer Utility does produce the intended "no color adjust" outcome in Mac OS10.14, at least with typical Epson, Canon, and HP drivers. I don't know about AirPrint. But ACPU has an ...
  • Serendipity. Apple broke the ColorSync utility "print as target" feature in OS10.14 (Mojave). It worked great in 10.13 (High Sierra). I'm still on Mojave, so I don't know if more recent OS ...
  • Yes, I have an Ansel Adams print that he made and signed in 1978. Printed on Oriental Seagull paper, it definitely lights up with 365nm UV flashlight. OBAs started appearing in traditional photo ...
  • I just attempted to use AirPrint to drive a Canon Pro-100. Compared to the available Canon driver, AirPrint seems to lose all ColorSync ability. Very stripped down functionality with just a couple ...
  • Sihl Masterclass Baryta Satin is/was a really nice OBA-free baryta paper. It is also a true baryta paper and has no TiO2. It used to be easily purchased in the USA from B&H. But it has essentially ...
  • As a general guideline, I agree with you. A paper marketed as "Bright white" more than likely has moderate to high OBA content. A paper marketed as "natural white" more than likely has very little ...
  • Optical brighteners can be and are added during the paper manufacturing step to either wood pulp papers or cotton papers. Hence, any base sheet can have or not have OBAs. But neither traditional ...
  • +1. So, two facts to keep in mind. First, In the absence of UV radiation falling on the print surface, blue wavelength photons still have enough energy to cause print fading, albeit not as potent ...
  • Replied in A suggestion
    Although eliminating UV radiation on display reduces fading typically by 2-4x the blue wavelength region is still potent enough to cause fading over time. It's still an exposure dose issue with ...
  • Replied in G650
    Canon claims 3800 4x6 photos per set of bottles. Also, I read a claim of 47 seconds per photo for this printer. That translates to nearly 50 direct hours of 4x6 photo printing to make 3800 photos, ...
  • Replied in Inkonomics
    You just reminded me that the G620 also now has a photo gray ink, an ink channel that was not in the original Chromalife 100 ink set. If this photo gray ink were merely a dilute version of the ...
  • Replied in G650
    Canon's most recent longevity claims with regard to the G620 (USA version of the G650 as I understand it) and its megatank formula for Chromalife 100 ink versus the Pro-200's Chromlife 100+ ink ...
  • Sometimes the problem is with old ink cartridges that have an internal sponge even if they show plenty of ink left. So, the ink doesn't flow correctly, leading to air entrainment in the system, ...
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