i dont think it exists, the closest thing would be celluloid or acrylic (heck you can even use clear silicone) sheets sanded to diffuse led lights.. at least ive never seen any. all the el sheets ive seen are white or teal glow
There is something out there will do it but it is still in the "crowd funding" stage. They have had product available before but I guess they are upgrading to a newer version. This company is called glospex. Here is the link to the Indiegogo campaign: https://www.indiegogo.com/projects/glospex#/
I'm not sure what the OP is asking about... EL sheet that is transparent when turned off? EL sheet that can be seen through from the backside when turned on?
Make your face-plate or visible area out of clear pla and then clear coat it. it makes it very easy to see through. spray a light coating of gold on top and bam good one way visability. tape off lighted section and away you go.
Make your face-plate or visible area out of clear pla and then clear coat it. it makes it very easy to see through. spray a light coating of gold on top and bam good one way visability. tape off lighted section and away you go.