Coloring unlawful milk.

Iowa Code § 194.18, under GRADES OF MILK.

Iowa Code § 194.18

A person who holds a milk hauler permit or a milk grader permit pursuant to section 192.111 may mix a harmless coloring matter in unlawful milk as provided in section 194.9 to prevent the unlawful milk from being processed and used in any form for human consumption. [C62, 66, 71, 73, 75, 77, 79, 81, §194.18 ] 97 Acts, ch 94, §9 ; 2002 Acts, ch 1148, §7, 11