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At 06:56 PM 4/26/01 -0400, Steve wrote:
>Got wondering what the current thinking is on using CO2/argon mixes, aka
>C25 and steelmix, for suit inflation.
>
>I use it ocassionaly, mainly because a some of the people I dive with have
>free sources of the stuff and hence tend to always have some on hand,  and
>have never had any problems, but (in theory at least) the CO2 combines with
>the moisture to become carbonic acid or something, and this could irritate
>skin damage the suit over time.

Unless the CO2 percentage is above 15 and you're going deeper than 200 ft 
it will be fine. A high PCO2 causes itching. That is, as most things in 
diving, this depends on Pgas rather than on fraction.

Hans

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