Loading ...
Sorry, an error occurred while loading the content.
 

Re: [PPLetterpress] Halting exposure

Expand Messages
  • Gerald Lange
    Dear Mark Stay with the goldenrod. Strips of film negative will work as well. Gerald
    Message 1 of 3 , Oct 11, 2001
      Dear Mark

      Stay with the goldenrod. Strips of film negative will work as well.

      Gerald


      Mark Attwood wrote:
      >
      > Gerald,
      >
      > I have found that UV light seems to partially go through rubylith and give
      > semi-exposed areas on the polymer, whereas if I use goldenrod paper it
      > doesn't do it. Am I using the wrong rubylith?
      >
      > Mark.
    • Mark Attwood
      Gerald, I have found that UV light seems to partially go through rubylith and give semi-exposed areas on the polymer, whereas if I use goldenrod paper it
      Message 2 of 3 , Oct 11, 2001
        Gerald,

        I have found that UV light seems to partially go through rubylith and give
        semi-exposed areas on the polymer, whereas if I use goldenrod paper it
        doesn't do it. Am I using the wrong rubylith?

        Mark.



        Mark Attwood
        mark@...


        ----------
        >From: "Gerald Lange" <bieler@...>
        >To: PPLetterpress@yahoogroups.com
        >Subject: [PPLetterpress] Halting exposure
        >Date: Thu, Oct 11, 2001, 5:29 am
        >

        > PPL
        >
        > This is partially in response to Milton's inquiry.
        >
        > If you need to expose one element of the negative longer than another,
        > you can mask off the element that needs less exposure with an opaque
        > material such as Rubylith. With the vacuum on and the negative-to-
        > plate contact secure, register and tape the mask to the vacuum sheet.
        > After you have exposed the element that requires the longest exposure,
        > remove the mask and re-expose the plate (you can determine the initial
        > exposure rate by subtracting the rate of exposure of the shortest
        > exposure requirement from that of the longest.)
        >
        > It might seem to make more sense to do this the other way around
        > (which is what I initially suggested to Milton). But it is a bit
        > easier on the nerves to mask this all out before you begin exposing,
        > than to try and mask at midpoint.
        >
        > Gerald
        >
        >
        >
        >
        >
        >
        > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
        >
      Your message has been successfully submitted and would be delivered to recipients shortly.