Re: Infrared in questioned documents

["Roque" <roqnet@xxxxxxxxxx>]

 >Andrew Davidhazy wrote:

,> My suggestion would be to get the deeper one, the 87C. Now, if you were
doing
> ir luminescence or fluorescence in the ir excited by visible then the 88A
might
> be a better choice. To do the latter you would also need a filter to block
all
> ir from your source though. IR luminescence is fantastic when it works!

Hi,
I intend to do IR reflectance and IR fluorescence (according to its writings
in the Internet).
In IR reflectance I will use as filter for the source - 2 Ektachrome
unexposed but developed -(copyrigth by Andrew Davidhazzy in " Making a
infrared filter transmitter improvised").
But, which would the way be of improvising a filter for light source in IR
fluorescence?
What does substitute a filter Hot Mirror?
Roque.

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