Salivary stains, seminal stains, and nails were not typed correctly using antibodies other than Bioclone reagents, while precise grouping of bloodstains was performed using most antibodies. When hair and dura mater were tested, all antibodies induced weak or non-specific haemagglutination; hence, correct grouping was not achieved. When antibody solvents were displaced with 5-20 percent bovine serum albumin in saline, human serum of the group AB donor or serum of chicken, sheep, or bovine, titers of reagents increased 2-8 times. Hair and dura mater were typed using Bioclone reagents after solvent displacement with human AB or sheep serum, whereas displacement with the other solvents enhanced non-specific reactions. 20 references and 8 tables