No person himself or by his servant or agent shall, for the purpose of sale or exchange, add any fat or oil other than milk fat to or blend or compound the same with any milk, cream or skimmed milk, whether or not condensed, evaporated, concentrated, powdered, dried or desiccated, nor shall any person himself or by his servant or agent sell any milk, cream or skimmed milk in any of the aforesaid forms to which has been added or with which has been blended or compounded any fat or oil other than milk fat.