My experience is different as I have found there to be some sort of mineral oil in the 70% with coats my negatives, leaving an oily sheen. Perhaps it is just the brand I purchased but for the extra 73 cents between the 70% and the 99%, I would get the better stuff. I actually purchased 4 bottles at Costco for $5.75 which should last 10-15 years. I also use it for cleaning (along with q-tips) as it evaporates almost instantly.
Never heard of any additives to isopropyl alcohol other than oil of wintergreen spiked alcohol which is dyed green. You could get ethyl alcohol which contained a denaturant but I haven't seen it in years. I doubt that any rubbing alcohol with additives could be sold in the US without noting the additives on the label. The US FDA is very strict in this respect. A difference between Canada and the US.
Last edited by Gerald C Koch; 01-25-2013 at 12:23 AM. Click to view previous post history.
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