Is there a difference between the real lifetime of rolled and cut-sheet film material?
Once a sheet is taken off the roll its lifetime is reduced to the published lifetime plus some period for factory storage. The roll lifetime is actually several times those published. • I am using the VRP-M material for making reflection holograms of 30x40cm (glass and film). I am having problems with successfully drying the emulsion. Can you help? Drying is a sensitive process. We recommend drying by soaking in soapy water. 1 capful of Agepon (or equivalent) per 1 liter of water works well. Be very careful to clean your film or plate meticulously before putting it in the soapy water. Any residual deposit on the emulsion can lead to severe problems. Certain chemistries will indeed produce non-soluble precipitates that need to be cleaned off by gentle and thorough wiping with a leather automobile cloth whilst the film is soaking in an (additional) bath of soapy water. Do not let any chemicals get into your final water bath as this must be completely pure. Make sure that you overdo it on
