RE: Re: micro film making

From: hermann andresen <hermanna_at_hotmail.com>
Date: Thu, 5 Aug 2010 07:54:32 +0000

Back in the last century I ran some microfilm experiments, reported in NFFS SYMPO 1999. Basically (Certified) Non-tautening nitrate was used & worked fine. Later non-tautening butyrate also did well. Acrylic lacquer was a complete disaster (seperated into islands).

Older water worked better. Liquid was in a squeeze (mustard/ketchup) bottle & stored in freezer (0F) til dispensed.
Lifting was with flexiframe, basically 2 yardstick sized wooden sticks front & back w/produce bags at the tips (tho sticks extended beyond for handling & hanging). Advantages are easy lifting as film comes off water vertically w/low stress. Also allows film to shrink during cure & greatly simplifies slackening, which is just a matter of adjusting stick spacing for covering. Water more than adequate for adhesion frame to film for lifting due to low stress.

For pure silver film, check out Stan Chilton & Steve Brown for gold, and track down some Rodemsky solution. For the rest of us, non-tautening is available from quarts to 55gal drums.

I never understood Charlie Sotich & Bob DeBatty prefering microfilm over plastic, but the film is already on the frame & saliva or water can be used as adhesive to airframe. With this in mind I laminated 2 sheets (lift one, pour 2nd, place 1st on top & lift) for industrial strength. After curing it was hard to tell as no bubbles etc.

Have fun,
              H



To: Indoor_Construction_at_yahoogroups.com
From: gertjanvanwezel_at_yahoo.com
Date: Wed, 4 Aug 2010 14:27:40 +0000
Subject: [Indoor_Construction] Re: micro film making


















 



  


    
      
      
      oke thats the way to do it .

that nitrate aircraft dope is the same as what we call (spanlak )Clear Shrinking Dope?

or how do I create this?



--- In Indoor_Construction_at_yahoogroups.com, Fred Bare <fred_bare_at_...> wrote:

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> The making of the covering material is called Microfilm. A shallow tank of water is allowed to "cure"- for 12 or more hours allowing volatile chemicals to escape. The ideal water temperature is between 68 to 74 degrees F. The microfilm based on nitrate aircraft dope with plasticizers added. Adjust the fornula to get the film you would like. A small amount of the solution is poured out onto the surface of the water in one smooth, extended linear motion.. The solution spreads out on the surface of the water to a nearly mono molecular thickness. It is allowed to "set" on the water's surface for several minutes.

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Received on Thu Aug 05 2010 - 00:54:56 CEST