Castile base, herbs, pH balance, and preservative — salon-quality liquid shampoo at home
Complete bio shampoo formulation course: understand surfactants without sulfates, brew a herbal tea base, combine castile and cocamidopropyl betaine for gentle foam, balance pH to 5.0–5.5 with citric acid, choose a broad-spectrum preservative, and bottle a 250 ml batch that lasts six weeks. Includes troubleshooting for too thin, too stripping, or separating formulas.
Full step-by-step lessons with photos unlock with a subscription.
Free preview
See how every step looks — photo, checklist, and pro tips included.
Commercial shampoos blend surfactants — soap molecules that grab oil. Castile alone is high pH and can feel squeaky. Betaine adds foam and mildness.
Goal: clean scalp without raising cuticle scales like dish soap.
Wash pump bottle with hot soapy water, rinse, spritz 70% isopropyl, air dry. Same for whisk and jars.
One dirty spoon ruins a batch.
Pro tip. Distilled water only — tap minerals affect preservative.
Full library access
Subscribe for $9/month or $79/year — every category, every guide.
View plansEach tip has its own step photo — browse free, then unlock the full course.
Step 1
Why store shampoo foams and yours might not
Step 2
Sanitize bottles and tools
Step 3
Steep rosemary or nettle 15 minutes
Step 4
Add glycerin to warm infusion
Step 5
Whisk castile into infusion slowly
Step 6
Add cocamidopropyl betaine
Step 7
Check consistency
Step 8
Test pH — target 5.0–5.5
Step 9
Add preservative at supplier dose
Step 10
Fill pump bottle via funnel
Step 11
First wash and scalp check
Step 12
Second wash — adjust if needed
Related courses with photographed steps — browse before you subscribe.
Hoodie Frutti DIY Masterclass
Make the trending fruit hoodie: pastel blank, back-print lemons and strawberries, optional sleeve embroidery, heat-set finish
DIY Niche Cologne for Men (Woody Citrus Eau de Toilette)
Build a wearable men's niche cologne: bergamot–vetiver–cedar pyramid, 12% concentrate, 7-day age, 50 ml bottle
How to Make Perfume Last Longer
Niche-perfume longevity playbook: concentration, skin prep, pulse points, layering, and storage
DIY Perfume Oil Rollerballs (Alcohol-Free)
Exact 10 ml fills at 15% aromatic load — three rollerball formulas with drop counts and 48-hour aging
$9/month · Cancel anytime · All courses included
Sign up to unlock