It shall be unlawful for any person, firm, corporation, company or partnership to sell, or offer to sell, to the public any merchandise or other products of any nature, which are represented to be blind-made products, unless the merchandise or other products have been actually made or manufactured by blind persons as defined in this act, or if such merchandise or other products are made or manufactured by a corporation, association or partnership, it shall be unlawful for such products to be sold or offered for sale to the public as blind-made products unless they are blind-made products as defined in this act.