An article shall be deemed adulterated in the case of food:

(1) If any substance has been mixed and packed with it so as to reduce or lower or injuriously affect its quality or strength;

(2) If any substance has been substituted wholly or in part for the article;

(3) If any valuable constituent of the article has been wholly or in part abstracted;

(4) If it is mixed, colored, powdered, coated, stained, or otherwise treated in a manner whereby damage or inferiority is concealed or in a manner whereby the appearance of said article is improved; provided, that this subdivision shall not apply to the precoloring or processing of fruits where such precoloring or processing does not conceal damage or inferiority;

(5) If it contains any poisonous or deleterious ingredient which may render such article injurious to health;

(6) If it consists in whole or in part of a filthy, decomposed, or putrid animal or vegetable substance or any portion of an animal unfit for food, whether manufactured or not, or if it is the product of a diseased animal, or of one that has died otherwise than by slaughter;

(7) If, in the course of its preparation or manufacture, an ingredient of inferior food value has been substituted in whole or in part for an ingredient of greater food value; or

(8) If it does not conform to the standard of purity or quality established for the article; provided, that when in the preparation of food products for shipment they are preserved by an external application applied in such a manner that the preservative is necessarily removed mechanically or by maceration in water or otherwise, and directions for the removal of said preservative shall be printed on the covering of the package, the provisions of this division shall be construed as applying only when said products are ready for consumption.