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  1. #1
    johnny_on_the_spot's Avatar

    Join Date
    Sep 2009
    Location
    Leipzig, Germany
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    Default Manoukian ZERO-IN Speedcure blue with the Sun?

    I just got my vacuum exposure unit working and I want to try exposing using the sun (since the space has huge east facing windows.) I use Manoukian ZERO-IN Speedcure blue as my emulsion. Have any of you ever used this combination? If so, do you have a recommendation for a "starting point time?" I assume location would have an effect on the exposure time, so I'm in Germany.

    Thanks

  2. #2
    Premium Member
    Andymac's Avatar

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    Aug 2003
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    Van Isle BC Canada
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    Default

    I don't know the emulsion - do you add diazo? or is it SBQ/pure photopolymer?

    A diazo emulsion, or dual cure is best, as it is less sensitive to light, so gives you enough time. At my location (50th parallel Vancouver island) in summer I have 80 seconds on yellow, 45 on white mesh. IN winter it changes a lot, the exposures can be a lot longer.

    if your emulsion is a fast polymer type (no diazo) your times will be half or even less - you have to be very careful you don't pre- or overexpose, as even weak ambient light will expose the fast emulsions.

    Do some tests drag a black card across in 10 second intervals. Note the position of the sun and overcast/weather. If you can see a shadow, you usually have enough light for a solar exposure
    Andymac

    services www.squeegeeville.com
    equipment www.tmiscreenprinting.com

    Todo es empezar.

  3. #3
    johnny_on_the_spot's Avatar

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    Sep 2009
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    Leipzig, Germany
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    Default

    Thanks Andy, I'll give it a try.

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