Minn. Stat. § 325F.36: MANUFACTURE AND SALE OF COTTON DUCK OR CANVAS; STAMPS, BRANDS, AND MARKS.

Any person, company, or corporation who shall manufacture for sale, or who may offer or expose for sale, any cotton duck or canvas or any article, other than clothing and wearing apparel, composed or made, in whole or in part, of cotton duck or canvas, shall distinctly and durably stamp, brand, or mark thereon the true and correct weight of such cotton duck or canvas, by ounces per yard, together with a description by name of any filler or other preparation placed in or on the cotton duck or canvas since its manufacture.