1.1 This guide provides procedures that should be used by forensic document examiners (Guide E 444) for examinations and comparisons involving rubber stamps and their impressions.1.2 These procedures are applicable whether the examination(s) and comparison(s) is of questioned and known items or of exclusively questioned items.1.3 These procedures include evaluation of the sufficiency of the material available for examination.1.4 The particular methods employed in a given