I’m still not finding a requirement that all ingredients must be listed for “true soap,” but there are words and phrases in the various sources that point to issues with deceptive practices if you list some, but not all, ingredients. I would want to know more if I decided to sell my product. (ETA: the answer to the “if one, then all?” question is here:
https://www.mariegale.com/if-one-then-all/)
This very recent post by Marie Gale (January 6, 2019) is an easy read. In the sections pertaining to ingredient labeling, she specifically adds “cosmetics only”.
https://www.mariegale.com/new-years-resolutions-check-your-labels/, but watch out if you claim your soap is cleansing!
Marie is also an official “HSCG Expert” now and has her own page in the
Handcrafted Soap and Cosmetic Guild How-To Library. (Posted January 19, 2019, here:
https://www.mariegale.com/members-of-the-hscg/).
This government webpage discusses the FPLA:
https://www.ftc.gov/enforcement/rul...eform-proceedings/fair-packaging-labeling-act
“Basic Requirements: The FPLA requires each package of household "consumer commodities" that is included in the coverage of the FPLA to bear a label on which there is:
- a statement identifying the commodity, e.g., detergent, sponges, etc.;
- the name and place of business of the manufacturer, packer, or distributor;
- and the net quantity of contents in terms of weight, measure, or numerical count (measurement must be in both metric and inch/pound units).”
The actual language in the US Code (law) is here, and, yes, it painful to read:
https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title15-chapter39&edition=prelim
Marie Gale also provides information on what must be included on soap labels in a post from 2015. She mentions further regulations that affect soap makers, such as state requirements for scales to be certified, here:
https://www.mariegale.com/myth-soap-labels-arent-regulated/
For example,
“For consumer commodities generally (including soap), the FTC created regulations (Title 16, Commercial Practices, Part 500, Sections 500.1 to 500.29) which specifically detail what must go on the label of every product (including soap). These regulations go into greater detail and specificity on how each of the three items required by law must be actually done.
These regulations include things like where the information must be placed, how to calculate the correct text size, when the street address may be omitted from the label, acceptable methods to identify the product, etc.
The regulations require that the net contents are presented in both inch/pound (i.e. ounces and fluid ounces)
and in metric (i.e. grams, milliliters).”
She goes on to list other considerations for soap makers, including that some states require “certification of scales used to weigh products for commercial sale (generally at a state level; often under the Department of Agriculture).”