Stop Formulating Shampoo Bars Like Liquids
If you’ve ever made a shampoo bar that looked perfect on paper but crumbled on the shelf, turned into a sticky mess in the shower, or lost its lather after...
All essays
Shampoo bar manufacturing
Process notes, formulation choices, quality checks, and packaging thinking for solid hair-care products.
The Mold Is Lying to You
I want to talk about something that almost never comes up in shampoo bar formulation discussions, mostly because everyone assumes it's already been figured...
Why Most Shampoo Bars Make Bad Shave Bars
I get asked this a lot: can I shave with my shampoo bar? The short answer is usually “sort of.” But the more useful question for formulators is why most...
Why Shampoo Bar Certification Has More to Do With Your Factory Than Your Label
When people first step into shampoo bar manufacturing, certification usually sounds like a branding decision. A logo on the box. A tidy proof point for...
Castor Oil in Shampoo Bars: Why Formulators Keep Reaching for It
Castor oil is one of those ingredients that shows up in shampoo bar formulas so often that people stop asking why. It gets credited with everything from better...
How do I adjust the pH of a shampoo bar properly?
The short answer is that you can adjust the pH of a synthetic detergent-based shampoo bar, but you cannot safely turn a true lye-based soap bar into an...
Shrink Wrap Is a Microclimate, Not Just a Cover
If you've ever opened a sealed shampoo bar after a few weeks on a shelf and found the film fogged, the surface tacky, or a faint oily sheen on the inside,...
The Alkaline Time Bomb Hiding in Your "Sensitive Skin" Shampoo Bar
Walk through any shampoo bar shelf marketed for sensitive skin and you'll hear the same pitch every time: sulfate-free, fragrance-free, packed with oat...
The Wire Cutter Question: What This Simple Tool Reveals About Shampoo Bar Quality
In shampoo bar manufacturing, the spotlight usually falls on surfactants, conditioning systems, fatty alcohols, pH, cure time, and packaging. The cutter, by...
What is the ideal superfat percentage for shampoo bars?
For most shampoo bars, the ideal superfat percentage falls between 3% and 6% . This range leaves enough unsaponified oils to condition the hair and reduce...