Printing acrylic on UV need help

[Big Blue]

I am printing a large (54" in dia.) logo with a rainbow look for a customer. It is being printed on a Vutek 200/600 UV machine, on 3/16" acrylic. I have one in the crate waiting to be installed, but a small "chip " was noticed by the installer. I printed it with my lamps set to medium, should I maybe set them to high? I know I cleaned the piece well with alchohol, but wonder If anyone else has had this problem with acrylic, if so what can I do to keep this from happening again. We have in the past used a roll on clear coat (matte finish)could this be something I should consider, or would you think my lamp settings are suspect Not real sure how much "baking" acrylic can hold up to.... Any help would be appreciated

 

[Gino]

Chip in the acrylic or in the ink ??

We've done all of ours under full lamp, but then we're also using a totally different machine. The 3/16" seems to hold up against the heat, but anything thinner tends to warp. Sorry I can't be any more helpful.

 

[Big Blue]

Sorry, Ink had a chip or a flake off, at least that's what Our installer said.

 

[Rasmus]

I have printed a lot on the Vutek 200/600 UV. Also on acrylic. I have had the same problems, and it didn't help raising the lamptemp to high.
What you need is a primer, and then prime the acrylic before you print on it. We use one from Sericol from a spraycan.

Hope you succed.

Rasmus

 

[Big Blue]

This will be printed on 7325 white acrylic, and will be a illuminated print.... Can I use this primer for this instance?

 

[Rasmus]

Yes, no problem...