8 Replies Latest reply on Dec 17, 2017 9:52 AM by rob day

    Can I use ppi not dpi in new Photoshop

    MBdesigner

      Hi,

      I've been designing for many years and have just noticed that in the updated version of Photoshop that I have (cc 2017) the settings are all now for ppi not dpi.

      Is there a way I can change that? I prefer to use dpi.

       

      Thanks in advance!

        • 1. Re: Can I use ppi not dpi in new Photoshop
          Silkrooster Adobe Community Professional & MVP

          They have been ppi for as long as I can remember. PPI (pixels per inch) is for screen and DPI (dots per inch) is for out to an ink jet printer.

          1 person found this helpful
          • 2. Re: Can I use ppi not dpi in new Photoshop
            D Fosse Adobe Community Professional & MVP

            Silkrooster is entirely correct. Pixels per inch means one thing, dots per inch means something else. In your printer settings you'll see DPI. In Photoshop it's PPI.

             

            Splitting hairs maybe, but it pays to keep the concepts straight. PPI is probably the most misunderstood acronym in the entire history of raster image processing - until you look at what it actually means.

            3 people found this helpful
            • 3. Re: Can I use ppi not dpi in new Photoshop
              c.pfaffenbichler Level 9

              And when talking about halftone printing (offset or gravure for example) there’s lpi …

              Lines per inch - Wikipedia

              3 people found this helpful
              • 4. Re: Can I use ppi not dpi in new Photoshop
                gener7 Adobe Community Professional & MVP

                The input pixels are not always equal to printer dots. It all depends on the printer.

                 

                Common inkjets like the Epson Stylus Photo 5760 x 1440 dpi specs require 360 ppi inputs since the "dots" are dithered.  1440/4 = the recommended 360.

                 

                And I think Commercial Presses go by line-screen 150 lpi (artbook quality) x 2 = requires 300 ppi.

                 

                That was a couple of years ago, the press technology must be way different now.

                1 person found this helpful
                • 5. Re: Can I use ppi not dpi in new Photoshop
                  rob day Adobe Community Professional & MVP

                  If a press is printing haftone dots, which is still the most common screening for offset, the imagesetters or platemakers draw the halftone dots (lines per inch) with smaller printer dots (dots per inch). The haftone screen creates the illusion of continuous tone by varying the size of the haftone dot. The output device has to be capable of a high enough resolution to accurately draw the various sized haftone dots—a 150lpi halftone screen would typically need a 2400 dpi output device.

                   

                  Inkjet printers use a stochastic screen to create the continuous tone illusion. In that case the screen dots are all the same size and the tones are created by varying the spacing between the dots. Offset presses can also print stochastic screens, but they are usually more difficult to print.

                  2 people found this helpful
                  • 6. Re: Can I use ppi not dpi in new Photoshop
                    IDEAS-Training Adobe Community Professional

                    The simple answer is "no" you can't change it. As previously mentioned, images have pixels, not dots.

                    For traditional printing the general rule for PPI is 1.5 time or 2 times the LPI. More resolution that is required just slows down the output process. I've always used 1.5 x the LPI; so for 150 LPI, I had 225 ppi.

                    That's slight more than a laser printer needs, but close enough. That way I'm covered for either print method.

                    It's important to note that if you pre-size your images to the 1.5 method, you can always reduce but not enlarge.

                    3 people found this helpful
                    • 7. Re: Can I use ppi not dpi in new Photoshop
                      pixxxel schubser MVP & Adobe Community Professional

                      MBdesigner  schrieb

                       

                      … that in the updated version of Photoshop that I have (cc 2017) the settings are all now for ppi not dpi …

                      Can you show us a screenshot, please?

                       

                      There is no version (that I know) in which you can set dpi in file new dialog.

                      eg PS 6.0

                      fileNew_PS-6.png

                       

                      or PS CS2

                      fileNew_PS-CS2.png

                       

                      or now in PS CC

                      fileNew_PS-CC.png

                      • 8. Re: Can I use ppi not dpi in new Photoshop
                        rob day Adobe Community Professional & MVP

                        PS 1.0

                         

                        Screen Shot 2017-12-17 at 12.30.42 PM.png

                         

                        Screen Shot 2017-12-17 at 12.51.05 PM.png

                        1 person found this helpful