Re: Using IR Flashbulbs

[pete <peteray@xxxxxxxxxx>]

Clive wrote,
>
>Thanks WIllem-Jan, had forgotten about the Cress flash bulb site.  His
>prices are reassuringly expensive.  Suppose it may worth investing in one
>or two bulbs - unless you know a source of infrared paint :-)

Quite a while back I posted a formula for coating flashbulbs for IR
photography. I found it in an early 70s vintage Photographers Formulary. It
had a lot of ingredients, almost all of which were available from a
chemical supply house. Unfortunately, it would cost a lot not only because
of the number of ingredients, but because you have to buy larger volumes to
get a decent price.

I had hoped that with all the technical people on the list that there might
be a chemist or someone knowledgable enough to look at the list and pare it
down and/or suggest substitutes.

I couldn't find my original post, but did find some correspondence with
Bill Cress about it. He was considering trying it, maybe he could give you
some info. A better alternative might be using unexposed, processed E-6
film and using it in a flash cover.

pete


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