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  1. RogerB

    Hello - I need help!

    Sorry, but this is a garment printer. The OP doesn't need an inkjet printer. Pad printing is the accepted way in industry to print on plastic components like the one he describes. Here's an example (not a recommendation!) http://www.cheap-pad-printers.co.uk/manual-pad-printer.html - ignore the...
  2. RogerB

    Hello - I need help!

    I think the most commonly used method for this sort of application is pad printing. Just Google it.
  3. RogerB

    Using ArgyllCMS + Colormunki to produce excellent printer profiles

    The illumination is at 45 degrees but the measurement is at 0 degrees, so it is unlikely that stray reflections will be significant. I suspect that the diameter of the measurement spot is defined by the optics of the sensor rather than by the illumination.
  4. RogerB

    Using ArgyllCMS + Colormunki to produce excellent printer profiles

    FWIW I find with my 3880 that I get very good greyscale performance with just 64 grey patches. The "K3" printers have a nice smooth greyscale native response which doesn't need too much correction so I'm not sure I would sacrifice so many colour patches. Interestingly the Xrite 918-patch target...
  5. RogerB

    Using ArgyllCMS + Colormunki to produce excellent printer profiles

    The light source of the i1Pro produces a conical annulus so that the measurement area is illuminated at 45 degrees from all orientations. Imagine a cone with an included angle of 90 degrees with its apex in the measurement plane. If you lift the measuring head the light is no longer focussed on...
  6. RogerB

    Using ArgyllCMS + Colormunki to produce excellent printer profiles

    Be careful! The i1Pro measures a spot about 4mm in diameter, but the accuracy of the reading for dark tones is reduced (a lot) if the measuring head is raised too far above the target. If you do add a mask make sure that it is very thin. My experience is that it is not necessary, but I'm not...
  7. RogerB

    Using ArgyllCMS + Colormunki to produce excellent printer profiles

    Here's something for impatient Argyll users (like me). My computer takes about 5 minutes to generate a high quality profile with my 1058-patch target using Argyll CMS. Yesterday I had four profiles to generate and not much time. When the first profile was being processed it occurred to me that...
  8. RogerB

    Using ArgyllCMS + Colormunki to produce excellent printer profiles

    At the risk of repeating myself, I would urge anyone attempting to fit the maximum number of patches on a given size sheet to verify that their measurements are sufficiently repeatable. All you need to do is measure the same chart twice (or more) and compare the two .ti3 files. You can do this...
  9. RogerB

    Profile Assessment

    Yes, I agree. The ultimate test of accuracy involves the measurement of a printed target, but that takes quite a long time. A tool like Gamutvision (or Colorthink?) can check the internal consistency of a profile very quickly. It usses the profile to predict the printed colours and calculates...
  10. RogerB

    Using ArgyllCMS + Colormunki to produce excellent printer profiles

    What I was trying to say is that it's not always necessary or desirable to use BPC. If you are printing a high-key image with nothing darker than L*=20 (48, 48, 48 in sRGB space) then even the darkest tones will be reproduced accurately on the matte paper that I used as an example. Turning BPC...
  11. RogerB

    Using ArgyllCMS + Colormunki to produce excellent printer profiles

    These screen shots may clarify it a bit more (if you are graphic oriented). This is strictly for B&W, but the same happens in colour. You can see how the slope of the line (contrast) changes when BPC is applied.
  12. RogerB

    Using ArgyllCMS + Colormunki to produce excellent printer profiles

    As you have found, the rendering intent can make a big difference to the appearance of the print, especially on matte papers. Personally I hardly ever use Perceptual rendering. You rightly say that Perceptual "compresses" the colours to fit the gamut of the printer colour space. What you have to...
  13. RogerB

    Printer Colour Gamuts

    Absolutely. I have used profiles from the paper manufacturers for post, so I hope that they have taken this into account when generating their profiles..
  14. RogerB

    Printer Colour Gamuts

    Interesting proposition. Of course for anyone with the facility to view gamuts in 3D it's just a question of inspecting the manufacturers' profiles, or profiles provided by paper maunfacturers. For this job, like Emulator, I can highly recommend Gamutvision. I think the biggest problem, as Roy...
  15. RogerB

    WARNING - Photoshop Elements 13 - Avoid Latest Update

    I'm not sure about PSE, but even this option is not available in CS6. Adobe no longer let you use a printer profile that is the same as the document profile. Even when this workaround was avialble there was a lot of debate about whether it worked reliably. ACPU, for all its faults, is stil the...
  16. RogerB

    Epson 3800 Pro - ink treatment

    Shake that printer!
  17. RogerB

    Something for the full frame enthusiast

    I think it's a good move by Canon. There must be lots of professionals using Canon full-frame cameras with "L" lenses that will jump at the chance to get more detail. And remember, at a body only price of around £3000 ($5000) this is not aimed at the consumer market. As for the need when making...
  18. RogerB

    A basic guide (see post #1) to setting up ARGYLL CMS profiling on your computer

    Came across an Argyll/Colormunki tutorial through a thread on LuLa. Take a look at http://www.ludd.ltu.se/~torger/photography/argyll-print.html
  19. RogerB

    Printing Negatives on OHP Transparents Alternative Processes

    This is a rather specialised application and I think you may get better rersults on other forums. For example, the making of digital negatives is often discussed in the QTR Yahoo group. Try searching on https://groups.yahoo.com/neo/groups/QuadtoneRIP/conversations/messages QTR seems to be the...
  20. RogerB

    Now you've calibrated everything: what lights do you use?

    Sounds good to me! I think you will be much happier with this arrangement than with any commonly available LEDs. Bit of a new twist on converting the bathroom to a darkroom isn't it?
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