When preparing an ingredient label for a finished product, there are simple rules that must be followed. The US Code of Federal Regulations (CFR) has a whole list of rules that have to be followed when preparing a cosmetic product for sale to the consumer. These rules for labeling fall under Part 21 (which deals with cosmetics), and Section 701 (which deals with cosmetic labeling) of the Code of Federal Regulations. In 21 CFR the basic rules for how to prepare an ingredient label are listed in numerical order and in order of importance. I have taken some of the most important rules and explained them here. These are some of the most common labeling rules that people have to follow.
First of all, the ingredient label must be placed in a prominent and conspicuous place on the cosmetic package so that is very easy to identify, read and understand by the average person under normal purchasing conditions. This rule is 21 CFR 701.3 (b) and (p) and states that the letter height for the label must be 1/16 inch except if the label area is less that 12 square inches.