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Forums Adobe Photoshop How to verify dpi?

  • How to verify dpi?

  • Jim Arco

    October 16, 2014 at 10:58 pm

    So we’re all used to manufacturers telling us a given printer is 1200 dpi or whatever. The question is: How would I verify that?

    If I print a black square 1″ x 1″ all I can see is black, no dots. So how would I know it wasn’t, say 1116 dpi, or 593 dpi, or even 1341 dpi?

    There really is a good reason for my question. My daughter works as a senior quality-control engineer for a company the plans to integrate a laser printer into their product line for dental offices. Given the legal environment and price points for their stuff, she needs to be able to verify every spec provided by third-party vendors.

    Ideas?

    Jim

  • Mark Landman

    October 17, 2014 at 5:02 pm

    select image>image size.
    the document size portion of the display will show you the resolution in either pixels/inch or per centimeter. Use this box to change the resolution if necessary.

    Mark Landman
    PM Productions
    Champaign, IL

  • Jim Arco

    October 18, 2014 at 11:35 am

    Mark,

    Thanks for answering, but I need to verify the printer specs. So if the manufacturer says that it is 1200dpi, how can I confirm that it is actually printing 1200 dpi and not, say, 1124 or some other number?

    Jim

  • Herbert van der wegen

    October 19, 2014 at 5:54 am

    You cannot – because the hardware may very well be capable of that resolution, but due to paper and ink limits, you will always have reduction in quality.

    To actually check the true technical limits you would have to contact the manufacturer directly, and ask for one of the engineers who worked on the product. Then ask for the technical references – but I doubt they will give those to you.

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