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Discuss the different types of equipment needed for screen printing. Topics include manual screen printing presses, automatic presses, dryers, folding machines, starter kits and high end machines.



Saving Emulsion

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Old 3 Weeks Ago May 24, 2019 8:19:59 AM -   #1 (permalink)
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Default Saving Emulsion

I only do shirts for a Veteran organization I belong to. I wonder if I could save my emulsion by splitting the diazo and emulsion at a half or quarter at a time. Basically sensitizing as I need it.
 
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Old 3 Weeks Ago May 24, 2019 9:29:35 AM -   #2 (permalink)
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Default Re: Saving Emulsion

You can, but don't over do it.
You can also store coated screens. Just dry them and keep them in a dark place.
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Old 3 Weeks Ago May 24, 2019 7:37:38 PM -   #3 (permalink)
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Default Re: Saving Emulsion

A photopolymer emulsion, like Saati PHU, is supposed to be good for one year from the date of manufacture. I had my last one over two years before I used it all up. It helps if you have a cool (not below freezing) place to store it.

Added benefit, it would probably be a lot faster exposing than your Diazo emulsion. If you are buying in person, check the manufacture date on the package. I've noticed that quarts tend to have a slow turn rate, so may be half aged-out just setting on the shelf. Larger sizes tend to be fresher, as that is what heavier users buy, so I've been getting gallon size (which is why it takes me over two years to use it all).
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