Comparison of the contrast prints on surfaces which had been wet with tap water, acid or base solutions before or after fingerprint impression, revealed no significant differences in the effectiveness of the SPR solutions used. However, the difference was seen when soaked in different concentrations of the salt solution, where the resolution of the fingerprint impression varied directly with the increasing salt concentration, decreasing with higher salt levels. The differences were distinctly demonstrated with the SPR II, III and X developers. In general, fingerprint impression was adversely affected by high salt concentration, where if the surfaces had been soaked in a high salt solution before fingerprint impression, the quality of the impressed prints as well as the number of the ridge counts were decreased.