Well PE, I tried to request said book from my alma mater, who can get within a week or so any book from almost any university in Illinois, well, problem is that not one school has Vol I, I can find Vol II easily but Vol I is illusive. Can you paraphrase what Haist said?
Ian - If you concede that there can be a difference of possibly weeks/months between A and B, is it not appropriate for one to suggest A is longer lasting than B if that is the question the OP posed? When each 1L of chemistry might cost a dollar or so, a month can matter and be akin to tossing $1 down the drain. If one can prevent wasting a dollar, a dollar saved is....
Fwiw OP, I am a Liquidol user, I don't print frequently, I mixed up 1L this summer and printed maybe 3 sheets in it, then bottled it up and have not been able to print till yesterday, it worked just perfect.