Did you know that 5% of the population is colorblind? Mostly men have the so-called red-green color blindness. That is reason enough to arrange a little visual test for your friends using your Colorblind Poster ;)
Probably, you've already seen this kind of test: If your visual faculty in colors is normal, you will identify a number or a symbol within the bunch of colored dots. If you don't see any shape, the diagnosis color blindness is very likely.
Admittedly, with our Colorblind Poster the diagnosis is set right from the beginning. You need a lot of fantasy to see anything on this picture - because the dots are just dots! This is, of course, a good method to shock and mock your friends ;)
Technical info:- Dimensions: 42x59,4cm (DIN A2)