A person who sells or manufactures, exposes or offers for sale as an article of food, any oleomargarine or other substance in imitation of any article of food, without disclosing the imitation by a suitable and plainly visible mark or brand, indicating and naming what the substance really is, shall be guilty of a misdemeanor, and, on conviction, shall be fined not less than ten dollars nor more than one hundred dollars, or be imprisoned in the county jail not exceeding one month, or both.