We just bought a set of capillary tubes to use as a demonstration of capillary action (5 tubes of varying diameters) but it is not working. I have made sure they are thorougly clean and dry, but even so, the narrowest tube still only went up about half a cm! Any ideas? Does anyone use something similar?
Kathryn
Maybe try them in hot or even boiling water. I use old bits of glass tubing and a capilliary tube. I just tried my stuff and it worked better with a 250ml beaker than a 100ml. Can only guess why....Pressure??? 3 brands of capilliary and all work tho Kimax are longer.
