Stop Building Soap Lines for Shampoo Bars
I've walked through a lot of small shampoo bar facilities, and here's the first thing I look for: not the mixer, not the press-the dehumidifier. If there...
All essays
Shampoo bar manufacturing
Process notes, formulation choices, quality checks, and packaging thinking for solid hair-care products.
What is the best way to label shampoo bars for compliance?
The best way to label shampoo bars for compliance is to treat them as a cosmetic product and build the label around the rules of each country where they...
How to ship shampoo bars without melting in summer?
Shipping shampoo bars in summer is absolutely doable, but heat can turn a perfect bar into a soft, sticky, misshapen mess if you don’t plan ahead. Delivery...
How to test the lather quality of a shampoo bar?
Testing lather quality is one of the most important parts of shampoo bar formulation and quality control. A great lather should form quickly, feel creamy...
Shampoo Bar Embossing: The Hidden Production Variable
If you’ve ever watched a beautifully embossed shampoo bar crack right along the edge of a letter, you already know the truth-this isn’t just branding. On...
The Travel Shampoo Bar Problem (And How to Engineer It Away)
Here's a piece of advice you'll hear all the time: "Just cut your shampoo bar in half and throw it in a tin." It sounds like a smart travel hack, and for a...
How to formulate shampoo bars for colored hair?
Color-treated hair is more porous, more negatively charged, and more prone to cuticle swelling than virgin hair. That means a shampoo bar for colored hair...
Rosemary Oil in Shampoo Bars: The Overlooked Truth
Walk through any handmade cosmetics group and you'll see the same assumption: rosemary oil is the natural answer to thinning hair. Add a few drops to your...
The Hidden Gel Phase in Shampoo Bars
Ask a cold-process soap maker about gel phase, and they’ll tell you about that glossy, translucent stage where the loaf gets hot and jelly-like. Ask a...
What is the role of citric acid in shampoo bars?
Citric acid is a weak organic acid derived from citrus fruits, and in shampoo bars it is used in small amounts as a true multi-tasker. Its main roles are pH...