Hi,
Does anyone know if it is possible and if so how to go about making a metal or plastic (durable material) semi permeable? I may be using the incorrect terminology but basically i need to know if it is possible to change a material to enable it to allow air to pass through however not liquids.
One way I thought you could do this was by inserting lots and lots of minute holes in the metal, holes big enough to allow air particles to pass through but not liquids.
Another way would be to use a material that has these properties anyway?
Does anyone know of such a material?
Any help would be appreciated
Thanks!