The laboratories typed a total of 593 bloodstains from 178 cases. The bloodstains were extracted with 6M urea followed by isoelectric focusing in narrow pH interval ultra-thin gels, immunofixation, and silver staining. Results showed that a total of 62.7 percent of the stains were successfully typed, for a success rate similar to that in a previous study. Bloodstains that were more than 3 months old were successfully typed in 6 of the laboratories. The oldest bloodstain was 7 months old. Types of materials on which the bloodstains were found included clothing, metal blades, concrete, paint, cement, glass, and grass. None of the materials consistently gave problems with GC typing. Thus, the results indicated the effectiveness of the GC system in actual forensic science work. Tables and 6 references. (Author abstract modified)