This study demonstrates the applicability of the powder suspensions, iron (III) oxide and
WetwopTM white, to fingerprints that have been exposed to SSA for up to one month.
Dry fingerprint powders or SPR type reagents could not be recommended for the
enhancement of fingerprints exposed to SSA for one month.
For prints exposed to SSA for up to one week,dry powders, particularly magnetic white,could be used if powder suspensions are unavlilable.