Author
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Topic: Sound Striping, 2 types of cement???
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Maurizio Di Cintio
Jedi Master Film Handler
Posts: 977
From: Ortona, Italy
Registered: Jan 2004
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posted August 10, 2013 09:35 AM
First off: there are two system for striping films: using paste ora laminated stripe: paste is a semi-liquid magnetic fluid that is dpread to the film and let evaporate; then it is refined, smoothened and ready for recording. This system is suitable fo both acetate and polyester based film/prints.
Laminated striping employes a magnetic tape slit from bigger reels (usually 1/4") which is then glued to the film base. This can only be done with acetate based films, because the glue actually is a solvent which slightly melts both the film base and the stripe's base (which must be of acetate too; that's why only very few types of tape are suitable for this operation, notably Agfa F-5). The solvent evaporates very quickly, right before the wilm is wound on the take up reel, thus having film and stripe become as if they were one, sort of embedded in each other. This kind os solvent is made of acetone and dioxan, but I don't know the exact proportions (maybe 2 parts of acetone and 1 of dioxan???). In the past Ektachrome 64T seemed a little too resistant to regular glue, in fact the stipe tened to come apart; wittner then introduced a stronger version which fixed the problem. In your case IF your material is acetate based, I yhink you can go with the regular striping glue.
-------------------- Maurizio
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