Cleaning microfiche?

On Tue, 8 Aug 2006 19:09:00 +0200 Jan-Benedict Glaw <jbglaw at lug-owl.de> wrote: Soap is a good start, but use some without perfume etc... I would try with wetting agent as it is used for photographic materials. This weting agent is basicly the same as dishwashing detergent without perfume, color, ... i.e. it is some stuff that lowers the surface tension of water. Wash the oil from the microfiches. Then apply the "Ilford watering procedure" after rinsing the microfiches. The last step is to put the microfiches again in fresh wetting agent for about 30 seconds and let them dry. You may use destiled water for that last step. Do not rinse the microfiches again in water after you soaked them in the wetting agent. The wetting agent helps drying the microfiches and prevents stains from drying water. Put the microfiches in a vertical position for drying so that the water can drip off. Beware of dust while drying! Usually you use wetting agent in a dilution of 1 + 500 for that last step, 1 + 1000 works good in most cases too. You really need only a tiny amout of wetting agent. You may use 1 + 100 to wash of the oil of. Handle the wet microfiches with care. The wet emulsion can be verry sensitive. Depending on the size of the microfiches you may purchase a sheet film developing tank as used in photography. (Look for a Yankee, Doran or Combiplan Tank or a Jobo drum.) This makes it easy to handle the microfiches without the need to touch them. -- tsch??, Jochen Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/