Plex treatments have become a standard upsell in almost every salon when bleaching or coloring hair — but behind the marketing promise of “hair protection for everyone” there’s more going on than your stylist tells you at checkout. In this article, we reveal what really happens in the mixing bowl, why not every plex works the same way, and what you as a client should pay attention to.
What Plex Treatments Actually Are
Every chemical treatment — whether bleaching, coloring, or perming — breaks and stresses the disulfide bonds (also called sulfur bridges) in your hair. Plex products are designed to protect or rebuild these bonds, preventing breakage, porosity, and loss of shine. Sounds great — but it only works properly when the product chemistry truly fits.
The First Thing Rarely Mentioned: pH Value
Most established salon plex products work in Step 1 at a pH of roughly 3 to 4, making them clearly acidic. The problem: bleaches and hair colors operate at a pH of around 9 to 10 — an acidic plex pushes that value downward. This can lead to extended processing times, uneven color results, or weaker lift, which salons rarely discuss openly with their clients.
Why pH Plex Is an Exception
According to the manufacturer, pH Plex is the world’s only patented plex system whose Step 1 is precisely calibrated to a pH of 9.0 — identical to the pH of common bleaches and colors. In practice that means: no color shift, no extended processing time, no overdosing risk, and a significantly simpler application for the stylist. According to Dr. Flohr, clients using pH Plex sometimes spend only half the time in the chair compared to classic plex products.
What Often Gets Left Unsaid in the Salon
- Not every plex binds to all amino acids — many competitor products only address a single amino acid, while pH Plex binds to all 21 amino acids of the hair protein.
- Glossings and acid masks don’t “repair” — they mask damage after the fact, whereas real plex products work at the very moment damage occurs.
- The surcharge for “plex” in the salon is often charged as a flat fee, even though actual product use varies widely depending on hair length.
- An independent YouTube comparison test showed that the side treated with pH Plex held better and was less frizzy after blow-drying than the side treated with a well-known competitor.
Plex Isn’t Just for the Salon
Professional plex products were long reserved for the salon — pH Plex changes that with pre-dosed sachets perfectly matched to shoulder-length hair and usable at home without complicated measuring. This makes plex protection accessible for anyone who doesn’t want to go without professional care between salon visits or during at-home coloring.
Myths Your Hairdresser Might Still Believe
| Myth | Reality |
|---|
| Myth | Reality |
|---|---|
| “Plex changes the color result” | Not with pH Plex – Step 1 matches the pH of colors and bleaches exactly |
| “Plex extends processing time” | With pH-matched plex, the workflow stays identical |
| “Plex is only for professionals” | Pre-dosed home applications make it suitable for end users too |
| “All plexes work the same way” | pH value and bonding mechanism differ significantly |
What to Watch for at Your Next Salon Visit
Actively ask which plex system is being used, what its pH value is, and whether it affects the processing time of your bleach — a well-trained stylist can answer this. Also check whether your salon sells plex only as an add-on or offers it as a standalone, bookable care treatment, as is possible with pH Plex.
More Knowledge Around Plex
For in-depth, scientifically grounded articles on hair structure, plex technologies, and application tips, visit the PLEX-TALK BLOG – pH Plex Deutschland, which regularly publishes new posts on hair chemistry, bleaching, and professional hair care. For a deeper dive, you’ll find posts on community questions, practice checks, and bonding hair care.
