Infrared in questioned documents

["Roque" <roqnet@xxxxxxxxxx>]

Hi,
I live in Brazil and I am beginning a work of analysis of questioned
documents.
I will use a Digital Back Phase One in a Hasselblad. I need to decide which
filter for infrared should buy (here the filters are very expensive), and I
would like to know which is the filter more adapted for this work type. If
somebody has experience with analysis of documents it helps me. Should it be
Wratten 88A or Wratten 87C?
Thank you,
Roque Boeira
roqnet@xxxxxxxxxx

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