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Question Size of image for 30x40 dye sub prints

Discussion in 'Photography Issues' started by Dave, Jun 24, 2015.

  1. Dave

    Dave SPFG, Supreme Picture Framing God

    I'm working with a client that needs a number of large dye sublimation prints on aluminum. I'm trying to communicate with them the resolution I need to go that large and have my service bureau print the images.

    I found this calculator on line:

    http://www.photokaboom.com/photography/learn/printing/1_calculators.htm#Pixels

    For a 30x40 print at 300 dpi it says I need 9000 x 12000 pixels. Is that how I would communicate the resolution I need to my customer?

    I know that viewing distance plays into how high of a dpi you need. These are photos going into a factory setting and would be viewed from at least five feet away. Do I need 300dpi? What might you suggest?

    By the way, I know just enough to be dangerous here.
     
  2. wpfay

    wpfay Angry Badger

    We use 300 dpi at finished size as a standard, though half that will produce good results. I would check with the folks doing the printing and see what they suggest. Can't go wrong that way, as they then take the liability for producing good images.
     
  3. Dave

    Dave SPFG, Supreme Picture Framing God

    Thanks, Wally.
     
  4. stcstc

    stcstc SGF, Supreme Grumble Framer

    firstly, its not DPI you need its PPI (pixels per inch)

    if its a corporate setting and the images are 5 ft away etc. depending on the type of images you could more than likely get away with as low as 150 ppi
     
  5. Steve Collins

    Steve Collins SGF, Supreme Grumble Framer

    Dave likes this.

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