While this does work, there is a problem with using this chalk at the gym. Using a blender makes the chalk VERY fine-- almost too fine, like๏ปฟ the consistency of baby powder. What happens is, the chalk acts almost as a dust when climbing on less textured plastic, reducing friction. Additionally, when climbing in very hot conditions (either indoors or outdoors), very fine chalk mixes with the sweat to become a paste rather than absorbing it (like crushed๏ปฟ chalk). This is exactly why I stopped using Bison Competition chalk. It feels nice, but isn't very functional. All in all, bad idea.
Watch this video if you buy Blocks of chalk