Any tips for Prints on Interior LED Lightbox Display that doesn't washout at higher Lumen Output?

[rukh03]

Typically we print for outdoor building signs and opaque signs at my work. I feel we have a pretty good handle on good color output and keeping color consistent between lit and unlit signs. Recently I have had a client ask me to match a paint color for an interior backlit led lightbox with high output leds. (like the movie poster boxes at theaters) These lightboxes are on dimmers & I can get the colors to match at 50%, but when the leds are a full blast the colors all washout. I am printing on a Mutoh VJ-1624 Valujet. I tried on double layered clear backed w/ trans white and printing on trans white backed w/ clear.
I have not run into this kind of application before. Any tips for product or techniques would be much appreciated.

Thank you

 

[ams]

If you do an overprint, it greatly helps but it will darken your colors more, so what I do is make the colors about 25% lighter so the darker makes it come out even. Never use clear with white ink, always use white translucent.

 

[rukh03]

Thank you. I will see if I can find a way to overprint on my printer. I will also try doubling down on the translucent white. (my printer can't print white)

 

[MikePro]

the only way I print trans. graphics, is with the dual-layer method: two prints on clear, one reversed, on either side of white poly/acrylic OR clear print with white trans.print overlay on clear/white poly/acrylic.

If this is still not enough, and you're still getting washout with brighter LEDs, then maybe have your base/reverse print layer printed with high ink limits/dual-pass OR create a 2nd file that has a higher color saturation/darker brightness level (or just tweak the settings in your RIP).

edited to add, doubling-down on white trans. negates the extra light from the LEDs. At that point, you may as well just run the sign at a dimmer setting/less LEDs.