I can't say for sure to be honest. It's a 6% gelatin solution, so it's quite liquid and takes a while to set up. I think a more viscous solution would be tricky with the comb, but this kind of comb (all the same size & spacing of teeth) does quite well I've found. Like a poor man's mayer rod!
I think it's about 0.5mL per square inch when wet coating, with a little excess.