Author Topic: Emulsion Expiration  (Read 811 times)

Offline Pangea

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Emulsion Expiration
« on: November 06, 2018, 01:50:24 PM »
Will old emulsion cause premature screen breakdowns? I have some Cryocoat that's about 13 months old and think it may be the culprit.


Offline Frog

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Re: Emulsion Expiration
« Reply #1 on: November 06, 2018, 03:29:02 PM »
Well, though your particular storage conditions can affect it, Photopolymer emulsions are the most tolerant of time. Specs are usually conservative and have some wiggle room.
Yours has a shelf life described thusly(wrong word and all, LOL): Shelf live: Unopened, 24 months. Opened, 6-8 months.
"It's crackers to slip a rozzer the dropsy in snide"

Offline Pangea

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Re: Emulsion Expiration
« Reply #2 on: November 06, 2018, 03:36:26 PM »
This gallon went through a move and a summer with little to no A/C so I think to be safe it's time to toss it.

Offline Frog

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Re: Emulsion Expiration
« Reply #3 on: November 06, 2018, 03:44:46 PM »
Photopolymers are pretty tolerant of temps up to 100.
In my experience, emulsion that has gone bad starts displaying negative characteristics way before the middle of a run.
I've had it curdle and coat poorly, (as well as stink)
I've seen it not develop as usual, either hard to rinse out or entire areas fall apart.
"It's crackers to slip a rozzer the dropsy in snide"

Offline screenprintdirect

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Re: Emulsion Expiration
« Reply #4 on: January 10, 2019, 02:26:08 PM »
Generally most emulsions will have the same life span but it varies on which one you're using
Ready to use emulsion 10-12 month life span
Diazo mixed into the emulsion for waterbased printing 2-3 weeks

Tips to make your emulsion last longer
store in 59-77F or for best results keep it in your fridge and reseal it

After 13 months I would toss it and get a new batch
Also I would write the day you open your emulsion on the container just to keep easier track



Offline Prince Art

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Re: Emulsion Expiration
« Reply #5 on: January 10, 2019, 11:24:29 PM »
Also I would write the day you open your emulsion on the container just to keep easier track

Seconding this. We write the day received, then the day opened. Helpful if you don't go through it quickly.
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