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I used to print shirts , and recently decided to screen coroplast signs ... WHAT A MESS !!
I am using 28"x36" screens ( maybe this is too small) ... and have tried 200, 255, 305 mesh. Tried Nazdar 59-000 ink & Cericol Ink.
So far I either get TOO MUCH ink and have to pry off the coroplast ( this does not give the ideal result ) ... or the ink SKIPS over the flukes ( I am printing ACROSS them, not with them).
I am helping the coroplast industry profits with my waste, but little else.
Would appreciate any advise on TWEEKING my operation. I am thinking my screens may not be large enough and since I am using a 1/8th inch ( or so ) OFF CONTACT, I may be expecting more elasticity from the screen than it is willing to give.
I doubt that I am going to be a real threat to the industry as a whole, so hopefully some of you KNOWLEDGABLE printers will pass along some knowledge and show me where I am going wrong.
Thanks ........... Richard
Rich
You will need the right ink for this type of substrate. Nazdar manufactures and recommends two inks for Coroplast. One ink is UV... 1200 series the other which is solvent is 7900 series. Feel free to contact them at (800) 767-9942. There customer service will help you out with any printing problems you are experiencing as well.
Good Luck
We focus on these signs as our primary revenue source so perhaps I can assist.
The 7900 series inks from Nazdar are what you want.
For 18x24 signs we use a 24x31 screen with a 230 mesh.
To prevent the corolast from sticking to the screen you need to design your press (we built our own) to hold the screen approximately 1/8" off the coroplast during the printing process. The squegee pressure will easily push down the screen to make contact and the screen tension will pull the screen back up as the squegee passes. This result in the screen only making contact at the squegee point and therfore no sticking.
Does anyone have problems with the 9700 ink drying too fast. I do tees as well and have tried coroplast with so-so results. The ink dries pretty fast. Any answers to the ink drying in the screen. With Tees, you flood the screen pre-print. Do you do this with coro? Also, what do you use to clean the ink out of the screen? Any solution to bleeding when printing? Is the screen too far from the coro?
Thanks for any help!
Corey
I have been using NazDar 59-000 series ink for my coroplast signs and it has been working extremely well. It does NOT dry all that quickly and cleans up well with mineral spirits. I also use Rapid-Remover which is an adhesive remover (citrus based) to clean up my screens and it works GREAT !!
It is also cheaper!! Nazdar's other cleaning fluids ( i.e. 301,302, 30xx, etc) are kinda like SELF-EMBOMING and makes your brain H-U-R-T !!!!!
Hope this helps ...
Richard
www.SignTrainer.com
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if you can , you should print with the lines on the coraplast, also I have had some trouble printing with uv inks (3900 nazdar) because the ink just peals off, but you can put some NB-80 in the ink to harden it up, or you could use 9700 solvent inks, and I think that wont peal off and it should print fine.