Pica ruler and Inch side not accurate?

Discussion in 'Design and Graphics' started by 7on, Feb 15, 2008.

  1. 7on
    macrumors 601

    7on

    Joined:
    Nov 9, 2003
    Location:
    Dress Rosa
    #1
    Is there a difference between onscreen picas and analog picas? I have a ruler with 6&12PT on one side and inches on the other. The problem I'm seeing is 6p0 lines up with 1inch - but at the opposite end it look like 12inches does not line up with 72p0 (I would guess the pica side being 2-3 points short...) Is this just my eyes playing tricks or is the ruler just wack? It is a Gaebel ruler.

    Thanks!
     
  2. TEG
    macrumors 604

    TEG

    Joined:
    Jan 21, 2002
    Location:
    Langley, Washington
    #2
    It is more than likely a problem with the ruler. I do believe there is a difference when dealing with PostScript, 72pt to an inch vs 70pt to an inch.

    TEG
     
  3. 7on
    thread starter macrumors 601

    7on

    Joined:
    Nov 9, 2003
    Location:
    Dress Rosa
    #3
    the weird thing is that it's only 2-3pt off on the same ruler.

    I've always just guessed (if it's close to 39p0, then it's 39p0) but that's not always good, and it has come to bite me one or two times.
     

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