Emulsion tackiness after exposure

[alan802]

humidity is the issue. i put a air conditioner in the srcreen room and poof..no more tackiness 

I wish that were the fix for us.  We've got an AC unit and a dehumidifier and it's just as bad as it was before we had that stuff and the humidity was 70%, now it's around 30%.  I've played around with the temperature and gone from about 68 to 85, with all humidity levels in between, nothing changes until the brand/type of emulsion changes.

[RICK STEFANICK]

we are using murikami photo blue for our plastisol jobs.

[IntegrityShirts]

humidity is the issue. i put a air conditioner in the srcreen room and poof..no more tackiness 

I wish that were the fix for us.  We've got an AC unit and a dehumidifier and it's just as bad as it was before we had that stuff and the humidity was 70%, now it's around 30%.  I've played around with the temperature and gone from about 68 to 85, with all humidity levels in between, nothing changes until the brand/type of emulsion changes.

I concur lol

[alan802]

I've got a gallon of orange coming in today, hopefully within the hour.  I've got 5 screens waiting to be coated with it and I might expose them later today if I can.

[tonypep]

Humidity is often the culprit but also know that some emulsion/film combinations are sensitive to heat. I have often seen this in shops where the exposure unit gets to hot due to constant use or cooling fan failure.

[Frog]

What do you guys think, is there a connection to emulsions that reclaim like bubble gum (as opposed to actually dissolving) and this tackiness?

[alan802]

What do you guys think, is there a connection to emulsions that reclaim like bubble gum (as opposed to actually dissolving) and this tackiness?

I don't reclaim enough to really know which emulsions reclaim which way, but I would like to know if there is a correlation there.

What emulsions have people had this issue with?  For us it was Chromablue, Saati PHW Red and Kiwo One Coat, all PP's and above 45% solids content.  What else can we add to this equation and what emulsions?  I'm sure we can break this down and get a good feel as to why this happens and where it's going to occur.

[Prosperi-Tees]

What do you guys think, is there a connection to emulsions that reclaim like bubble gum (as opposed to actually dissolving) and this tackiness?

I have had that issue only with PPs, and when I dont let the screen fully dry.

[Frog]

I have only used pure photopolymer emulsions for the last eight or so years.
The absolute easiest reclaim has been with Chromaline PL (just dissolved and was never tacky on exposure) and the gummiest and stickiest was Xenon Nova. (Interestingly, the two also represent extreme ends of the price scale as well)
My present CCI Prochem PFX, I'm still getting used to, but seems to be in the middle.

[ebscreen]

I've only seen it in the higher solids emulsions.

If I had to guess, the higher solids means quicker drying, or so it would
seem. I'd assume the outside layer dries quickly, leaving moisture sandwiched inside.


Aquasol HV, no problemo.

[IntegrityShirts]

Aquasol HV, no problemo.

Another +1 for Aquasol reclaim, no gummy.  Just a few minutes in the tank and it washes out clean even on my 2/4 coated 110 screens.

[ericheartsu]

We use CPtex emulsion, and it tends to stick, especially when the weather changes, thats when we notice it the most.

We reclaim in CCI Gem-zyme wash, and we've had fantastic results, and rarely any gummy mess, even when our films stick to our screens!