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Signs sticking together

Posted on Sat, 19 Nov 2005 at 9:54



I am new to all of this and need some tech help. I have a small sign business and when I print the coro signs, they come out fine, I put them on the rack and wait and not matter how dry they feel, if I stack them vertically along the wall to get my orders ready to go out, whe I go out the next morning to box them, half of them will be stuck together. I am getting pretty frustrated hearing the sound of two pieces of coro being pulled apart due to stuck ink. I am using Color FX Graphic ink and adding retarder like the rep said to.
I am curious if maybe it is where I live. Here in central FL we have a lot of humidity a lot of the time. I close the shop and run a dehumidifier and an air conditioner overnight after a printing day in order to try and get the ink dry. It has helped and the cooler weather with less humidity has also helped but hopefully I will not be out of business by next summer so I need to solve the problem. Any ideas?

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Comments

Anonymous says: What happens w/ solvents ink is called blocking (ink re-wets itself when in contact with ink from other sign). You should buy a uv dryer, better adhesion, quicker and no dry time, no ink drying in screen. ...

What happens w/ solvents ink is called blocking (ink re-wets itself when in contact with ink from other sign). You should buy a uv dryer, better adhesion, quicker and no dry time, no ink drying in screen. Print both sides without waiting for it to dry. I might have a 24" uv dryer available. For now let the signs dry longer on the racks and put a fan near rack to make the solvents fume out faster. You might want to try catalyst but ink is only good for the day. uv dryers are bit expensive but you save time w/productivity and less headaches.

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posted on: Sat, 11/19/2005 - 11:43pm
Anonymous says: The ink is not coming into contact with other ink, it is coming into contact with the back side of the coro sign in front of it, no ink, just plain coro. I have 10 racks full right now and tonight it ...

The ink is not coming into contact with other ink, it is coming into contact with the back side of the coro sign in front of it, no ink, just plain coro. I have 10 racks full right now and tonight it started raining. I am hoping the humidity does not keep the signs from drying. I have the air on, all doors closed, the dehumidifier and the big fan going so I can only hope and wait.
I know uv would be no dry time and the pluses it has but the huge cost of a uv dryer is a big minus for me. I am trying to make this thing go without going completely broke in the process.
One printer told me to put baby powder in the ink to cut the gloss and make the dry time faster, all I can see that doing is making my ink thicker and making it dry on the screen. I am afraid to try it and then have it not work, then I have to clean up a big mess to do the run.
I appreciate any suggestions.......

posted on: Sun, 11/20/2005 - 10:54pm
Anonymous says: what mesh count are you using. The lower the mesh count results in more ink being deposited thus taking a longer time to dry. The higher the mesh count result in less ink deposited and faster dry times, ...

what mesh count are you using. The lower the mesh count results in more ink being deposited thus taking a longer time to dry. The higher the mesh count result in less ink deposited and faster dry times, but solvent inks dry faster in the higher count mesh. You might be putting down too much ink for it to dry properly.

posted on: Sun, 11/20/2005 - 11:29pm
Anonymous says: Have you tried Nazdars 7900 Series Corogloss Screen Ink? Give Nazdar a call 800-767-9942 posted on: Tue, 11/22/2005 - 10:31am
Anonymous says: We use Color FX inks. We had a similar problem when we started as well. Are you using a 70 durometer squeegee. If so, this causes too much ink to be laid do. Go to 80 duro squeegee and a 230 mesh count. ...

We use Color FX inks. We had a similar problem when we started as well. Are you using a 70 durometer squeegee. If so, this causes too much ink to be laid do. Go to 80 duro squeegee and a 230 mesh count. You'll use less ink and your problem might be solved.

posted on: Wed, 11/23/2005 - 9:49pm

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