Seiko & Citizen Watch Forum Message Archive

I was wondering how the change of polymers would affect the total amount of helium atoms inside the watch after a dive or period under sat. conditios ? The NBR has a higher diffusion rate for the helium atoms than the IIR so it would seem that a lot more helium atoms would diffuse through into the watch. But it would also mean that a lot more would also diffuse out of the watch during decompression, thus meaning that the total left in would be similar for both polymers. I suspect that the solving of this problem is not as simple as it sounds and has something to do with the different partial pressures of the different gases used in sat. diving. Any Ideas ?

Is the equation reproduced in the post significant and if so does ayone have an idea of what the variables represented are ?