Occasionally the "Hindenburg" varnish is incorrectly identified as, or stated being similar to, cellulose nitrate which, like most nitrates, burns very readily. Instead, the cellulose acetate butyrate (CAB) used to seal the zeppelin's skin is rated by the plastics industry as combustible but nonflammable. That is, it will burn if placed within a fire but is not readily ignited. Not all fabric on the "Hindenburg" burned. For example, the fabric on the port and starboard tail fins was not completely consumed. That the fabric not near the hydrogen fire did not burn is not consistent with the "explosive" dope hypothesis.