§ 154. Adulteration and sale of boiled linseed oil. No person shall manufacture or mix for sale, offer or expose for sale, or sell under the name of boiled linseed oil any article unless the oil from which said article is made be wholly the product of commercially pure linseed or flaxseed and unless the same has been heated to at least two hundred and twenty-five degrees Fahrenheit. No person shall sell such adulterated boiled linseed oil unless the package containing the same shall be plainly marked in legible black letters two inches high and one inch in width "Adulterated Boiled Linseed Oil," or without informing the purchaser at the time of sale that the same is not pure boiled linseed oil, and the invoice shall accordingly read "Adulterated Linseed Oil."