I've been reading some on the internet about polaroid black and white positive negative films. 655 seems to be pretty much like 55, only for medium format. You have to dunk the negative in sodium sulfite after pulling it off. This seems a little awkward for in the field. Is it really necessary? On one forum somebody said they just rinsed the negative in plain water and skipped the sodium sulfite step. --shannon ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.