8mm Forum: Sound Striping, 2 types of cement???

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Topic: Sound Striping, 2 types of cement???

Zechariah Sporre
Jedi Master Film Handler

Posts: 557
From: Ladysmith, WI U.S.A.
Registered: Dec 2010

posted August 09, 2013 07:56 PM

I know there have been many topics closely related to this but I couldn't come up with the definite info that I wanted. From what I was seeing there are at least 2 different types of cement for attaching magnetic sound track.
I just recently got a Rexette film striper but I don't have any cement so I want to get some but from my searching it appeared maybe this kind of cement is no longer available?
Does this type need a thicker cement then some stripers? Does anybody use anything like this anymore?
As far as the film stock, I want to add a sound track to some of my Blackhawk films such as some of my Harold Lloyd features.

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There is a fine line between a hobby and a mental illness

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Maurizio Di Cintio
Jedi Master Film Handler

Posts: 977
From: Ortona, Italy
Registered: Jan 2004

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.

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Maurizio

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Hugh Thompson Scott
Film God

Posts: 3063
From: Gt. Clifton,Cumbria,England
Registered: Jan 2012

posted August 11, 2013 10:09 AM

Hi Zachariah, Phil at CHC should have some of this on his shelves.
Give him a mail.

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