Re: Re: OS Film patching?

From: Jake Palmer <82.jake_at_gmail.com>
Date: Mon, 4 Feb 2013 10:34:36 -0800

I've patched OS film exactly the same as microfilm. I use film sandwiched
between newspaper like John, but rather than brushing on adhesive, I spray
the patch with sticky water (water with a little sugar in it). After I
place the patch I remove the newspaper with surgical tubing.


On Mon, Feb 4, 2013 at 9:38 AM, <joshuawfinn_at_gmail.com> wrote:

> **
>
>
> Interesting discussion. Here's my method for what it's worth. I can say
> that it does work quite well, but have no idea on the weight added bit...
>
> 1. Coat a piece of paper with extremely thin rubber cement (thinned to the
> point that when it dries there is almost no tack left to it).
>
> 2. Spread a piece of film onto the paper (the side you applied cement to).
> Make sure it's spread as smooth as possible. If you've thinned the cement
> properly, you can easily peel the film loose and reposition if you mess up
> the first time...or the second...or so on.
>
> 3. LIGHTLY mist the film with 3M-77. It only takes the most minute amount.
>
> 4. Trim the paper/film patch to size to match the hole, tear, etc.
>
> 5. Lay atop the offending area and ensure that the film is attached
> completely across the bonding surface. I like to lay the patch on the top
> surface, just to maintain consistency that the bottom of the wing is the
> surface to watch out for.
>
> 6. Carefully peel the paper loose. It should come right off with no
> resistance.
>
> I've tried this method a number of times, often to address extremely large
> tears, with great success and minimal frustration/time investment. Biggest
> advantage is that you don't have to brush/spray adhesive onto the wing,
> which I find sometimes leads to unpleasant circumstances, at least for me.
> When the tear is extremely large, you only want to get the 3M-77 on the
> outer edges of the patch because its weight is definitely not negligible,
> and it represents a huge sticky surface, which is a storage risk since 77
> remains very sticky for a very long time. In theory, the rubber cement does
> not leave a significant residue on the film provided that it has been given
> enough time to dry prior to the film being layed on the backing paper.
>
> Good flying,
> Joshua Finn
>
> --- In Indoor_Construction_at_yahoogroups.com, "John Kagan" wrote:
>
> >
> > --- In Indoor_Construction_at_yahoogroups.com, "mkirda_at_" wrote:
> > >
> > > Is there a recommended way to patch OS film?
> > >
> > > Regards.
> > > Mike Kirda
> > >
> >
> > Don't know about "recommended", but I use a procedure modeled after the
> old microfilm patching method:
> >
> > - Sandwich a piece of film between two sheets of newspaper
> > - Brush some adhesive around the area to be patched (do this before you
> cut the patch, because it will change the size and shape of the hole/tear)
> > - Cut the newspaper/film/newpaper into an appropriately sized patch
> > - Remove one piece of newspaper (microfilm used to stick to the
> remaining piece nicely - plastic film doesn't as well)
> > - Stick the patch over the hole/tear. It is easiest to position it
> properly if you turn the wing over and apply the patch on the opposite side.
> > - Remove the remaining piece of newspaper
> >
>
>
>
Received on Mon Feb 04 2013 - 10:34:38 CET