I love movies and had this star trek poster that my mother bought for me. So I look on this website to see how to make a back light for it, and with some tweaks to Timmyd_2's tutorial i created this little gem!! so go ahead and read on!!
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Step 1: Start to Build
now go buy or check your poster you have to measure it's width and length min was 36 x 24" (i believe) now go get one 2x4 measure both 24" and 36" ( the 36" will now become 33 due to the 2x4 being 3" in width see picture) you will end up cutting the 2x4 in half to make a total of 4 pieces. now screw all 4 sides to make a rectangle. next fill in and knots of crack with puddy and let dry..... an hour later sand the puddy smooth and make the sides fit flesh with one another. next get black gloss paint and paint it up!
Step 2: Lighting
lighting in the next step from the 1st picture is the lights I used Christmas lights you can pick them up at Walmart, I had these laying around collecting dust the 2nd picture is me laying the poster over the wooden border to do a size to size comparison. now that you have a rope of lights you need to glue them as a border on the inside of the wood. Once all glue is dry or hardened plug in the light and check it out, later on fittle with the light and put it into the position desired.
Step 3: Final Product
add some tin foil to the back to get a brighter picture. besides that your done pretty easy right!? after this none of my posters will be safe again!!! *Evil / villainis laugh* Now all that is needed is a L bracket to hand it up!!
Step 4: Update
I just got home from walmart and realized they don't always carry christmas light in stock so for $8 (tax included) I picked up a florescent "under the counter" light and I also pick up a Indiana Jones curse of the crystal skull poster (I love Indiana Jones) and use that poster. the pictures speak for them selves