Weekend Wonderings: Does "safe for colour treated hair" mean anything"
In September's Q&A on Patreon, Doris asked: Does "safe for color-treated hair" on shampoos have any real meaning" Are there any common surfactants or other ingredients we might use that would not be safe for color-treated hair" I assume by "safe" they mean the ingredients are less likely to fade or change the color (or maybe it's just an advertising gimmick), but I'm planning to ask some friends to try out my shampoo and conditioner and don't know what to say if they ask about this.
The short answer is that if you formulate mild shampoos with gentle to mild surfactants and ensure the pH is below 6, you can be assured your product is colour safe.
Almost all the surfactants we use in our products are considered gentle to mild. Some of my favourites - sodium cocoyl isethionate (SCI), which I use for shampoo bars to create big, fluffy, "elegant" foam and lather; C14-16 olefin sulfonate (Bioterge AS-40), which is great for oily skin and hair; SMC taurate, which is great for dry to normal hair and skin; and foaming silk, oat, amaranth, and other proteins, which are super mild and great for really dry hair or any skin type.
Sodium lauryl sulfate isn't considered mild, so if you're looking to make something colour safe, this is the one to avoid. Some people avoid sodium laureth sulfate, but it's considered mild, and is good for all hair and skin types.
Choosing the right surfactants is vital, but there are two other ...
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http://swiftcraftymonkey.blogspot.com
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