It's not THAT bad, only pH2'ish, dilute battery acid :devil:
Certainly advise washing self and kit asap after coming out of the mine. Any metalwork needs a good wash, dry and a spray with WD40, cows tails and ropes a good wash in mild soapy water. Advise hosing off mine mud from outer clothing before putting in washing machine (out of SWMBO'd eyesight that is!!)
We keep 1st aid kits with eye wash bottles scattered throughout both mines. Very rare do we have to use the eye wash but it's nice to know that if you do get a nasty drip in your eye, especially from a snottite swiping across your face, that you're only a couple of minutes at most from relief...