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Need Help ink not sticking to acrylic?


New Member
i have a mimaki UJF3042 MK2
I'm having issues with the ink coming off when I'm printing onto acrylic blocks and getting orders sent back.
when its first printed it seems pretty solid but im not scratching it enough to try to damage it, lots of the complaints are that the corners chip off. i was using a primer we bought from mimaki but now they are telling us this only works on glass and they don't have a acrylic primer?
anyone use a good primer for acrylics or know where to look for one? any advice would be great. we are using the LH-100 ink set.


New Member
were using 20mm thick cast acrylic, printing in reverse backed in white ink. they look great but the ink just isn't sticking enough, and were struggling to find a decent primer


New Member
I've had good results with Supply55 AP3155 (http://www.supply55.com/adhesion-promoters-s/78.htm). I doubt you'll be able to easily get digital print acrylic at that thickness, so an adhesion promoter is probably your best bet. Also, you might want to look into extruded acrylic. I've had cast acrylic that varied over 1mm in thickness over the length of the piece I was printing on. Not fun when you ruin a (not cheap) pre-cut acrylic piece...


Premium Subscriber
We print quite a bit of ADA signs made from acrylic. Typically we are using non glare acrylic and the DA acrylic specifically for printing is tough to get in non glare so we use the Mimaki primer with pretty good results. We also back paint acrylic and use VPS-1 adhesion promoter from Grip Guard for that process and it works great.


New Member
Before we found a supplier for the DA acrylic we would sand with 600 grit to get the ink to stick.