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Author: liwya

UV vs Conventional Printing

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Post time: 2013-4-15 17:05:59 |Show all posts
Printing on plastic. Watch fors.
Static- Press needs a good anti static system, De-inonized air at the feeder helps as well.
Surface tension- Make sure the dyne level of the stock is withing an acceptable level, this is usually checked using a dyne pen.(poor ink adhesion will result if this is not correct)
ink/water- Plastic wont absorb water the way board or paper does so carrying the minimum(which you should always do anyway) will prevent a lot of headaches. (poor ink cure could happen if the ink is oveloaded with water not to mention all kinds of other print issues)
Press settings- UV has a much smaller operating window than conventional and with plastic its even smaller, monitor your rollers/dampening settings closer, always monitor your Conductivity and keep the fountain solution system extra clean.
Blankets- UV blankets are prone to 'embossing', dont be surprised if you are using more blankets.
Ink- Dont mix anything into UV ink that has not been sanctioned by the ink maker(extender/reducer or your ink cure can be compromised)
press side tests- pratice quality control on your sheet,( tape adhesion tests, scratch tests to ensure ink wont rub off during post press operations)
If you pratice good pressmanship running a conventional press then running UV on plastic is not so bad.
Hope this help get you started, lots of info on the web and in this site so i'm sure you'll get other information.
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