Re: IR transmitting laquer

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On 22 Aug 96 at 18:23, SINCLAIR@xxxxxxxxxxxxx wrote:

> Thinking about the recent posts re flash exposure of IR film...
> 
> Somewhere, buried deep in either a book or my files, I have a recipe 
> for a laquer that, in the past, (perhaps a previous life) I used to coat 
> various flash bulbs (yes those big ugly finger melting things that still 
> reside in a box in my darkroom) to expose IR film without any 
> visible (or as one James Henderson has called it *hominid *) light 
> being seen.
> 
> I have been thinking that it *could* perhaps be applied to a plastic 
> cover placed in front of an electronic flash unit.
> If there were any demand for the recipe I could hunt it out and 
> forward to the list.

Sorry Ken, but I think you have to start digging....;-)) 
I am definately interested in this receipt! 
Have you any idea about its life expectancy in case of normal 
tungsten lights? This might be a perfect application for large flood 
lights; normally the only solution is chemically hardened IR 
glass....


--
Bye,

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The difference 
between men and boys
is the price of their toys

<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]

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Topic No. 4