When it shall appear from an examination or analysis that a specimen or sample of paint, putty, linseed oil or other paint oils, turpentine, or varnish is misbranded, or insufficiently branded or labeled or adulterated, the state chemist shall give notice thereof to the person or firm from whom such specimen was obtained, and such person or firm shall have an opportunity to be heard. If it should then appear that any of the provisions hereof have been violated, the state chemist shall certify the facts to the proper district attorney, together with a copy of the results of the examination or analysis duly authenticated by the chemist or officer making the examination or analysis, and the certificate of analysis or examination of such chemist or officer, when duly sworn to, shall be prima facie evidence of the facts therein certified.