Weathered Petrochemical Standards

Weathered Petrochemical Standards

These solutions are prepared from a single-source (one-refinery) product. The weathered materials indicate the percent weight loss from the original material. Samples of regular- and premium-grade unleaded gasoline were collected, then blended in equal volumes. There are four general types of mineral spirits, classified according to boiling point range (BPR):

• Type I (Stoddard solvent) BPR 149–182°C
• Type II (high flash point) BPR 177–196°C
• Type III (odorless) BPR 149–196°C
• Type IV (low dry point) BPR 149–174°C