"Secondhand" means any materials or articles used in the construction of bedding or upholstered furniture that have been previously used for any purpose, and shall include "sweepings" which are wastes recovered from gins, furniture and bedding factories, textile plants, or establishments using fibers or other materials. Manufacturing processes shall not be considered previous use, and new materials that are free from dirt or other contamination shall not be classified as sweepings.
Ca. Bus. and Prof'l. Code § 19008