Airplane pilots whose eyes were damaged by flying shards of PMMA fared much better than those injured by standard glass, demonstrating better compatibility between human tissue and PMMA than glass
अशा तऱ्हेने तयार झालेले पीट गाळाखाली पुरले गेले म्हणजे ते अधिक टणक होते व त्याच्यापासून दगडी कोळशाचे सामान्य प्रकार तयार होतात .