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  1. #1
    Premium Member
    miklay's Avatar

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    Default Murukami Aquasol HV sticking in screens

    I've been have issues. Emulsion is brand new. I coat, expose, and wash out. My stencil shows up as a lighter shade than
    what's exposed, but is really stubborn and won't wash out properly. It's like the screen is holding on to it and not letting go.

    I'm coating in the garage, it's between 40 and 50 degrees ... could it be the temperature?

    Normally I don't need a pressure washer to wash it out, as the emulsion should be soft. In the past, it washes out
    smoothly with just the flat spray of a garden nozzle.

    Light is not an issue, i coat in the dark and they dry in the dark, no light until they hit the exposure unit.

    Any ideas?
    +++++ POWERSLIDE DESIGN CO. +++++ facebook +++++ aka: mike klay

  2. #2
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    Default

    You might just have a crap batch. Has never happened to me with Murakami but sure did with Chromaline.

    This is what you usually use, right?

    Temp shouldnt make any difference. Try a thorough stir?
    Are your coated screens bone dry before you expose? Is the air damp? Dehumidifier?

  3. #3
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    Default

    i got 2 screens that were perfect and about 10 that didn't work.

    usually use it, yes. totally dry screens. its an uninsulated garage and we are in the pacific northwest, but the humidity isn't crazy like other places. might be that i'm not stirring it enough.
    +++++ POWERSLIDE DESIGN CO. +++++ facebook +++++ aka: mike klay

  4. #4
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    Andymac's Avatar

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    Default

    your film/printer change? (black density - check with the 2 that worked)
    Andymac

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

    Todo es empezar.

  5. #5
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    Default

    What mesh count are you working with? I don't know if that's a relevant factor, but I'm planning on using Aquasol HV too, and want to know as much about your setup as I can in case I run into a similar problem.

  6. #6
    squeegeethree's Avatar

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    Quite frankly. I never trust an emulsion that just washes out with a garden hose.

  7. #7
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    miklay's Avatar

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    Default

    I've been trusting the garden hose / sprayer method for years now, and it works for me. To each his own. I only pull out the pressure washer to reclaim.

    I'm using 230 screens. Found out what the problem was. My photo flood bulb tends to emit a supernova of light right before it craps out, hence over exposing my screens. Bumped it down to a 30 second exposure and presto!
    +++++ POWERSLIDE DESIGN CO. +++++ facebook +++++ aka: mike klay

  8. #8
    jonkeefe's Avatar

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    What's everybody's favourite colour emulsion? I like red.

    I also find mesh size affects washout. 305 mesh, I can use the "gentle shower" setting on the nozzle and the design falls out in seconds. 110 (or even worse, 86) mesh, and a pressure wash is almost required. Takes forever.

  9. #9
    squeegeethree's Avatar

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    Quote Originally Posted by miklay View Post
    I've been trusting the garden hose / sprayer method for years now, and it works for me. To each his own. I only pull out the pressure washer to reclaim.
    Oh I misread. Yes your screens should develop with normal water pressure. We use a pump system to develop...
    Clown Squirt Flower - Party City
    It takes a while to develop but the non-stop laughs are worth it.

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