Input (grade 13): A tiny (under 1 mm), soft-bodied wingless psocoptera (usually Trogium pulsatorium), that actually feeds on molds and other organic matter found in ill-maintained works, although they will also attack bindings and other parts.
Output (grade 11): A tiny (under 1 mm), soft-bodied wingless psocoptera (usually Trogium pulsatorium). The insect actually feeds on molds and other organic matter found in ill-maintained works, but they will also attack bindings and other parts.