UJF-6042 Backlit Signs

[Ditchmiester]

I'm working on a new project where we are printing small backlit 3mm Acrylic signs. I'm having problems with to much light bleed and wondering if anyone can help me figure out how to print a dark enough black to only have the light visible where there is no ink and the rest look dark black.

Thanks in advance.

 

[ams]

If you want some light to shine through the dark but very little, do a 2 or 3 overprint. Meaning every pass, it will drop 2 or 3 times the ink in the same area, basically raised ink.
If you want to do a total block out where no light shines through the black, you need to apply a block out film to the inside of the acrylic. Avery makes one. But pay attention to
which side the black goes on and which side the white goes on.

 

[SignMeUpGraphics]

Sandwich a white layer between two CMYK layers whereever you need blockout.

 

[Ditchmiester]

Is there a better CMYK Value to help block light then black? The first layer will be black but would the back later make a difference?

 

[ams]

Black is best, you can use 100,100,100,100 for a true black.