Klasscolor: Permanent Color at the pH of Skin
Conventional permanent color works at pH 9–11 — forcing the cuticle open and stripping the scalp’s acid mantle to get pigment in. Klasscolor is an acid coloring emulsion formulated at pH 5–5.5, engineered by a dermotricology laboratory to deliver full gray coverage and lasting brilliance without that trade-off. This is the complete professional guide to the chemistry, the system, and the protocol.
Klasscolor is a permanent coloring emulsion formulated at pH 5–5.5 — the same range as healthy scalp skin. Conventional permanent color operates at pH 9–11, which is what forces the cuticle open and disrupts the acid mantle. Klasscolor instead relies on a buffer effect to hold pH stable across the service, and a micro-pigment structure small enough to distribute through the cortex without alkaline swelling. The result is lasting, brilliant color with full gray coverage — delivered without the itching, flaking and progressive porosity that follow alkaline chemistry. It was developed by Laboratorios Kapyderm over seven years of dedicated research and dermotricological testing before the line was released, and introduced to the professional market as the first acid permanent color of its kind.
- The problem conventional color creates
- What Klasscolor is — and the seven-year rule
- Color at the pH of skin
- The buffer effect
- Micro-pigment technology — resolving the old trade-off
- The collagen emulsion partnership
- The three-part Klasscolor system
- In the chair — Málaga and North Carolina
- Gray coverage, tonal range and reflect control
- Where color meets Dermotricology
- The evidence behind the mechanism
- Klasscolor vs. the alternatives
- The client consultation
- Frequently asked questions
The problem conventional color creates
Every colorist knows the chemistry, even if it is rarely said out loud: to make permanent color last, you have to force your way in.
Healthy hair sits at a slightly acidic isoelectric point of roughly pH 3.67. The scalp maintains its own protective acid mantle at pH 4.5–5.5. At that pH the cuticle scales lie flat and overlapping — the strand is smooth, reflective, moisture-retentive and mechanically resilient, the cortex is sealed, and the disulfide bonds that give hair its strength remain intact.
Conventional permanent color operates at pH 9 to 11. Alkalizing agents raise the pH of the fiber so the cuticle swells and lifts, letting pigment precursors reach the cortex where oxidation locks them in. It works. It is also, structurally speaking, a controlled injury — repeated every six weeks, for years.
The cuticle does not close cleanly again
Once forced open by high-alkaline chemistry, cuticle scales do not snap back into place. Alkaline pH increases the negative electrical charge on the fiber surface, raising inter-fiber friction — the mechanism behind roughness, tangling and progressive breakage across repeated color cycles. At pH 9–11 the effect extends past the cuticle’s lipid barrier into keratin denaturation in the cortex.
A stripped acid mantle behaves predictably
The acid mantle is a protective film of naturally occurring acids maintained by sebum. Alkaline formulas strip it, and the downstream picture is familiar from the shampoo bowl: dryness, persistent itching, flaking — and then paradoxical oiliness days later, as the scalp overproduces sebum to compensate.
Sensitivity is cumulative, not congenital
Scalp reactivity to color is rarely present from the first service. It builds. A client who colored comfortably for fifteen years can begin burning at the bowl in her forties — because the barrier has been alkalised, stripped and re-formed several hundred times. Roughly 40% of consumers now report skin irritation from conventional color. In a full book, that is several clients a week.
The industry’s answer has always been to repair the damage afterward — bond builders, acidic rinses, post-color treatments. Laboratorios Kapyderm asked a different question: why create it in the first place?
What Klasscolor is — and the seven-year rule
Klasscolor is a permanent coloring emulsion developed by Laboratorios Kapyderm — the same Málaga laboratory that has spent 35+ years building the patented science of Dermotricology.
That origin is the entire point. Klasscolor was not created by a color house that later added a scalp product. It was created by a scalp-and-skin research laboratory that decided to solve color. The brief was unusually strict: deliver a genuinely permanent color, with full gray coverage and long-lasting brilliance, without compromising the scalp or the fiber. In conventional color chemistry those goals are in direct opposition.
Klasscolor took seven years of research and dermotricological testing before a single tube was sold. That is not unusual restraint for this laboratory — it is the standard applied to every Kapyderm line before launch. It is why the catalog is deliberate rather than large, and it is worth saying out loud to a colorist who has watched the industry ship a new bond-builder every season: this is a color built over seven years, not seven months.
Klasscolor was presented to the professional market at Expocosmética in Porto, where the trade press covered it as the first acid permanent color to reach the market — introduced not as a color launch, but as a dermotricological coloration built with natural components. It has been in professional use across Europe ever since.
João Cotrim, CEO of Kapyderm Portugal, framed the distinction carefully: the color that develops “does not affect the scalp or cause irritability,” and it “achieves balance in the hair after application.” Dermotricology specialist Fátima Gómez summarized the laboratory’s posture in a line worth borrowing — the brand works in beauty, “but with health first.”
Color at the pH of skin
The defining specification of Klasscolor is simple to state and difficult to achieve: it is an acid coloration, formulated at pH 5–5.5.
Read that against the numbers above. The scalp’s acid mantle sits at 4.5–5.5. Klasscolor is formulated to sit inside that same band — meaning that for the first time in a permanent service, the color environment and the skin environment are essentially the same environment.
Acid color systems behave fundamentally differently from alkaline ones. Rather than swelling the cuticle open, they keep the cuticle compact, depositing tone while the scales stay flat. The practical consequences are the ones clients actually notice: more shine, a smoother hand, and a conditioning rather than stripping experience.
Every colorist is trained to bring the hair back down to an acidic pH after the service. Klasscolor never leaves it.
The buffer effect
The mechanism Kapyderm identifies as central to Klasscolor is its buffer effect — the formula’s capacity to hold pH stable across the service rather than letting it swing.
This is what protects both surfaces at once. The hair fiber is not driven into the alkaline range where cuticle lifting and keratin stress occur. The scalp’s acid mantle is not stripped, because nothing in the process demands that it be. Kapyderm attributes the elimination of color’s three most common complaints directly to this buffering behavior.
Itching
The immediate irritation response when alkaline chemistry meets skin at the bowl — the complaint that quietly ends a client’s color history.
Flaking
The delayed desquamation that follows a stripped acid mantle. This is the client who calls three days later, not the one who complains in the chair.
Fiber porosity
The structural consequence of repeated cuticle lifting — why color-treated hair drinks product, loses tone early, and fades faster with each cycle.
Micro-pigment technology — resolving the old trade-off
Here is the objection any experienced colorist should raise, and it is the right one: acid color has historically meant impermanent color.
That has been the accepted rule. Highly alkaline formulations (pH 9–11) achieve deep pigment penetration at the cost of structural damage. Mildly acidic formulations (pH 3–6) act far more gently but have traditionally delivered a less lasting result. Gentleness and longevity have been a zero-sum choice.
Klasscolor’s answer is pigment size. The formula’s pigments are engineered small enough that penetrability no longer depends on forcing the cuticle open. They distribute readily throughout the cortex, producing durable color that does not wash away — achieved through the physics of the pigment rather than the chemistry of the assault.
Alkaline color solves penetration by changing the hair so large pigments can get in. Klasscolor solves penetration by changing the pigment so the hair doesn’t have to change. Same destination — the cortex — reached without the structural cost.
Kapyderm notes a corresponding application characteristic that follows directly from the chemistry: Klasscolor does not need to be dragged through the hair. It needs to be properly saturated across the full cortex area. Technique follows formulation.
The collagen emulsion partnership
Klasscolor is described by the laboratory as achieving its result through the ideal mixture of the coloring emulsion with the balsamic collagen emulsion — the same collagen technology used across the Kapyderm Dermotricology system.
This is where the two lines genuinely converge rather than merely sharing a logo. Collagen in the Kapyderm system coats and seals the cuticle, filling surface gaps — the mechanism behind the smoothness and light reflection that reads as shine.
Applied within a color service, that means the vehicle carrying pigment into the fiber is simultaneously conditioning the surface it passes. Alongside the natural components Kapyderm identifies as hydrating and protecting both skin and hair, the service stops being a damage event followed by a repair step. The conditioning is inside the color.
The three-part Klasscolor system
Laboratorios Kapyderm organizes Klasscolor into three components. The structure is worth knowing before you order.
The acid coloring emulsion carrying the micro-pigments — the core of the system. Permanent, buffered, and formulated within the scalp’s own pH range. Mixed with the balsamic collagen emulsion, it delivers tone and coverage while the cuticle stays compact.
Permanent color services, full gray coverage, and every client for whom scalp comfort or fiber integrity is a consideration — which, over enough cycles, is all of them.
Natural tones, reds and fantasy shades, selected from the Klasscolor color chart.
The developer paired with the coloring emulsion to drive oxidation and lock pigment into the cortex. Carried in the U.S. under the Klasscolor category.
The lightening component of the system, used where lift is required before or independent of the coloring emulsion.
The foundation protocol
Every Klasscolor service rests on the same foundation, printed on the carton itself (60 ml professional tube, Reg. DGFPS 1478-CS, made in Spain, professional use only). Learn this and you can work the line safely. It is the floor, not the ceiling — the Kapyderm Advanced Protocol builds on top of it, and that is what deeper training covers.
1 · Color. Mix the 60 ml tube with an equal quantity of cream peroxide (1:1). Process 30 minutes. Klasscolor does not need to be dragged through the hair — it needs to be properly saturated across the full cortex area. Never use a metallic bowl or implement.
2 · Emulsify and cleanse. Emulsify, rinse thoroughly, then wash with the cleansing base for colored hair.
3 · Rebalance. Finish with Enzyme Balance (Equilibrante Enzimático). This step is not optional and not a retail upsell — it is written into the manufacturer’s directions, and it is where the service returns the fibre and scalp to their balanced state.
Almost every professional color line ends its directions at “rinse and shampoo.” Klasscolor’s directions do not end until the hair has been cleansed with a color-specific base and enzymatically rebalanced. That is the dermotricology laboratory showing its hand: the service is not finished when the color is developed — it is finished when the scalp and fibre are back in equilibrium.
In the chair — Málaga and North Carolina
Formulation theory is worth exactly as much as what comes out of the chair. This is a full color correction built on the Kapyderm Advanced Protocol by Boris Soler, International Educator for Kapyderm, whose salon sits in Málaga — the same city as the laboratory that makes the line.
Boris Soler trains beauty, hairdressing and esthetics professionals internationally for Laboratorios Kapyderm. His Málaga salon, Le Fabric 54, specializes in color, blondes, balayage and color correction — in the same city where Klasscolor is formulated.
- Base build. ½ shade 4 + ½ shade 5, with 20 vol oxidant.
- Lift. Decolorization with 20 vol oxidant, with collagen in the mix.
- Tone. Shade 7.66 with 6 vol oxidant and 10% collagen.
- Rebalance. Enzyme Balance + collagen + molecular reconstructor.
- Finish. Styling techniques and blow-dry.
Read that formula again and notice what it is not. It is not “mix 1:1 and process 30 minutes.” Collagen is carried through every chemical phase — into the decolorization, and into the toner at 10% — so the conditioning is inside the chemistry rather than applied afterward as repair. The service then closes with Enzyme Balance, collagen and molecular reconstruction.
That is the Kapyderm Advanced Protocol: the foundation on the carton, extended by technique that has to be taught. The carton tells you how to use the product safely. It cannot teach you to sequence four chemical phases on compromised hair and finish with the fiber in better condition than it started. That is what the training is for.
And in a chair in North Carolina
Málaga is where Klasscolor is made. The more useful question for a U.S. colorist is whether it performs the same way here — on American clients, in an American salon, with American water and expectations. Graziela Salazar uses Klasscolor more than anyone else in the Kapyderm USA network.
Kapyderm Henderson — 113 S Garnett St., Henderson, NC 27536 · (252) 767-3901 · kapydermusanc@gmail.com
Want the full breakdown — the shades, the phase sequence, and where collagen and Enzyme Balance entered the service? Formulas like this one are taught step by step in the Klasscolor Masterclass by Kapyderm USA, with special guest Boris Soler.
A manufacturer’s own educator producing beautiful work with the manufacturer’s own line is expected. A working sub-distributor in North Carolina producing the same standard, on her own clients, week after week, is evidence. Graziela is a Master in Dermotricology as well as a colorist — which means the scalp is evaluated before the color is formulated, every time. That is the whole argument of this article, running in a real business.
The Klasscolor Masterclass by Kapyderm USA
Join the free Klasscolor Masterclass by Kapyderm USA, with special guest Boris Soler, International Educator for Kapyderm — covering formulation, phase sequencing, and the Advanced Protocol technique behind the work above. Monday, August 31 · 10:00 AM Eastern Time (U.S.)
Developer volumes for each application scenario, the full shade chart, and confirmation of what the published pH 5–5.5 figure describes — most likely the finished state after enzymatic rebalancing rather than the developing mixture. Professional documentation is requested from marketingcomercial@kapyderm.com.
Gray coverage, tonal range and reflect control
The commercial question every colorist asks second: does it actually cover?
Kapyderm’s position is that intense color and long-lasting shine alongside complete gray coverage is achievable with the Klasscolor line — that the two are not in conflict. This is the specification that most separates Klasscolor from gentler acid and botanical alternatives, which typically concede coverage in exchange for kindness.
The line spans natural tones, reds and fantasy shades, supported by a color chart for tone selection. One characteristic worth raising with any colorist evaluating the line: Kapyderm states these tones are achieved without the unwanted reflects — the pinks, oranges and greens that pull through on other systems. For a working colorist, predictability is worth as much as the shade itself.
Send the Klasscolor shade chart and numbering system and this becomes a proper reference section: level structure, tonal families, and the natural / red / fantasy breakdown. This is the section colorists will screenshot, so it is worth building from the physical chart rather than approximating.
Where color meets Dermotricology
For a general salon, Klasscolor is a better color line. For a Kapyderm practice, it is something more useful than that: it removes the contradiction at the center of the service menu.
Consider the client already in the chair. She is there for a scalp protocol — thinning at the part line, or a sensitized, flaking scalp being brought back to balance. She is also, like most women over forty, coloring her gray. If that color is conventional and alkaline, then every six weeks she undoes a meaningful part of what the protocol is building. The practice calms an acid mantle that her colorist strips on a schedule.
You cannot restore a scalp barrier on Tuesday and strip it on Saturday and call it a protocol. Klasscolor moves color from the thing that works against the treatment plan to part of it — performed at the pH the plan is trying to maintain.
The client with a history of reaction — contraindicated. Klasscolor carries the standard EU colorant warning: do not color if the client has a rash on the face, a sensitive, irritated or damaged scalp, or has ever reacted to hair color. That client is not a color candidate. In a Dermotricology practice she is a scalp protocol candidate — treat the barrier first, and revisit color only once the scalp is sound and a sensitivity test is clear.
The active Dermotricology client who colors — bring her color in-house so it stops working against the protocol between sessions.
The high-porosity, over-processed client — years of alkaline cycling. Removing further cuticle lifting stops the compounding; pair with the collagen work already in your toolkit.
The gray-coverage client who wants a gentler option — historically forced to choose between coverage and kindness. Klasscolor’s position is that she no longer has to.
Active scalp disease or open lesions — not a color candidate until resolved. Treat first, color after, and refer to a physician where appropriate.
Color selection in a Dermotricology practice follows the same discipline as tonic selection: it begins with the scalp, not the shade. A trichoscopy evaluation with the Kapykon camera maps the actual presentation — sebum load, follicular congestion, scaling, inflammation — before any color service is planned. Where the evaluation shows an inflamed or compromised barrier, the scalp protocol comes first and the color follows.
Standard sensitivity testing and your normal consultation protocol apply to every color service without exception. Klasscolor is professional use only, is not for anyone under sixteen, and carries the standard EU colorant contraindications — do not color a client with a facial rash, a sensitive, irritated or damaged scalp, or any history of reaction to hair color or to a temporary “black henna” tattoo.
The evidence behind the mechanism
Kapyderm makes specific claims about how Klasscolor behaves: that alkaline pH damages the fibre and the scalp, that keeping the service acidic protects both, that a buffer holds the environment stable, and that collagen fills and seals the cuticle. Those are not marketing abstractions — each is a mechanism the independent, peer-reviewed literature has examined directly. Here is what the science says, separate from anything Kapyderm publishes.
Supported
Peer-reviewed cosmetic-science work establishes that at pH 9–11 keratin denatures, disulfide and peptide bonds cleave, and the lipid layer holding the cuticle scales dissolves — lifting the scales and leaving the fiber porous and weakened. Proteomic analysis confirms the damage reaches the cortex, not just the surface (Robbins; Gavazzoni Dias, Int J Trichology 2015; mechanisms of impairment review, PMC 2023).
Supported
The cosmetic-chemistry literature is explicit: low pH keeps cuticle scales lying flat and sealed, producing smoothness and shine, while high pH swells and opens them. This is the same acid-close / alkaline-open mechanism every permanent-color system relies on — and the reason a post-service acidic step is standard practice (Robbins; equilibrium-pH fiber study, PMC 2021).
Supported as a research direction
Buffered dyeing systems — formulations using buffer chemistry to hold pH within an optimal band across the service — are identified in the peer-reviewed literature as one of the most promising routes to reconciling color performance with fiber health. The principle Kapyderm names is an active, recognised area of cosmetic-science research, not a proprietary assertion (Sapianov, hair color chemistry & pH, 2024).
Supported
Hydrolyzed proteins including collagen adsorb to the fiber surface through electrostatic attraction to oxidation-damaged sites, filling cuticle fissures, reducing friction and increasing shine; smaller peptides penetrate toward the cortex. A 2024 study on collagen peptides specifically measured improvements in hair-shaft elasticity and gloss (ScienceDirect, Int J Biol Macromol 2026; AP collagen peptide study, 2024; CIR safety re-review).
Supported
Dermatology literature confirms the scalp shares the facial skin’s structure and acid mantle (pH ~4.5–5.5), that lipid-processing enzymes function optimally only in that acidic range, and that an alkaline shift raises transepidermal water loss and compromises the barrier — the same stripping-and-overproduction cycle seen at the shampoo bowl (Acid Mantle in Dermatology, J Integrative Dermatol 2024; Skin Surface pH, Cosmetics 2025; Indian J Dermatol Venereol Leprol 2023).
What the literature does not yet show
These studies validate the mechanisms Klasscolor is built on — they are not studies of Klasscolor itself. No independent trial has yet published head-to-head data on this specific formulation’s finished pH, wash-fastness or gray coverage. The mechanism is well-evidenced; product-specific proof is the manufacturer’s to supply, and is a fair thing for a colorist to ask to see demonstrated.
You do not have to take the brand’s word for the science — the science stands on its own in journals that have nothing to do with Kapyderm. Alkaline pH damages hair and scalp; acidic pH protects them; buffers stabilise the middle; collagen seals the surface. What Klasscolor claims is to have engineered a permanent color around those established facts. Whether it delivers on that in your hands is exactly what a swatch on 100% gray, washed and assessed, will tell you — and what the Advanced Protocol training exists to demonstrate.
Klasscolor vs. the alternatives
| Capability | Klasscolor | Conventional permanent | Botanical / semi-permanent |
|---|---|---|---|
| Operating pH | 5–5.5 — acid | 9–11 — alkaline | Varies; typically mild |
| Cuticle action | Stays compact | Forced open by swelling | Surface deposit only |
| Effect on acid mantle | Formulated within its range | Strips it | Generally preserved |
| Permanence | Permanent — does not wash out | Permanent | Fades with washing |
| Gray coverage | Full coverage | Full | Partial at best |
| Itching / flaking risk | Formulated to eliminate | Well documented | Low |
| Porosity over repeat cycles | Cuticle not lifted | Compounds | Minimal |
| Unwanted reflects | Controlled — no pink, orange, green pull | Variable | Common |
| Conditioning within the service | Collagen emulsion in the mix | Separate post-step | Variable |
| Post-service protocol | Three steps — enzymatic rebalancing written into the directions | “Rinse and shampoo” | Varies |
| Origin | Dermotricology laboratory | Color houses | Botanical brands |
Conventional and botanical columns reflect established color chemistry as described in the cosmetic-science literature cited below. Klasscolor column reflects Laboratorios Kapyderm’s published product specifications.
The client consultation
Most clients do not know color has a pH, and the explanation lands best when it is short and physical rather than technical.
“Your scalp is skin — it has a natural acidity that protects it, right around a pH of five. Most permanent color runs at nine to eleven. That’s what forces the hair open so the color can get in, and it’s also what strips your scalp. It’s why color can leave you itchy or flaking.”
“The line I use is formulated at that same pH of five. The pigments are small enough to get in without prying the cuticle open — so you get full coverage and it doesn’t wash out, but your scalp isn’t paying for it.”
“If you’ve ever had color burn at the bowl or flake afterward, that’s the difference you’ll notice first.”
Klasscolor is a professional cosmetic color system. It is not a treatment for any scalp disease, and should never be presented as one. Clients presenting with active dermatitis, open lesions or a known scalp condition should be evaluated — and referred to a physician where appropriate — before any color service.
Frequently asked questions
- pH and fiber damage — Gavazzoni Dias MFR. Hair cosmetics: an overview. Int J Trichology. 2015;7(1):2–15. PMC4387693.
- pH and the hair — Dias MFRG, de Almeida AM, Cecáto PMR, et al. The shampoo pH can affect the hair: myth or reality? Int J Trichology. 2014;6(3):95–99.
- Cortex-level damage — Mechanisms of impairment in hair and scalp induced by hair dyeing and perming and potential interventions. Front Med / PMC10232955. 2023.
- Equilibrium pH & fiber structure — Effect of equilibrium pH on the structure and properties of bleach-damaged human hair fibers. PMC7757171. 2021.
- Buffered dyeing systems — Sapianov. Hair color chemistry: how pH affects structure and quality. 2024 (identifies buffer dyeing systems as a leading research direction).
- Protein film / cuticle repair — Interaction of polypeptides with hair in different reducing environments. Int J Biol Macromol / ScienceDirect S0141813026000334. 2026.
- Collagen peptides & hair — The impact of AP collagen peptides on hair shaft elasticity and gloss. ScienceDirect S175646462400536X. 2024.
- Protein substantivity — CIR Expert Panel. Safety Assessment of Hydrolyzed Collagen and related hydrolyzed proteins as used in cosmetics. Re-review 2006 / 2017.
- The acid mantle — From Discovery to Modern Understanding: The Acid Mantle in Dermatology. J Integrative Dermatology. 2024.
- Skin surface pH & barrier — The Origin, Intricate Nature, and Role of the Skin Surface pH in Barrier Integrity, Eczema, and Psoriasis. Cosmetics (MDPI). 2025;12(1):24.
- Acid mantle & barrier enzymes — Acid mantle: what we need to know. Indian J Dermatol Venereol Leprol. 2023.
- Reference text — Robbins CR. Chemical and Physical Behavior of Human Hair. 5th ed. Springer.
- Product & launch — Laboratorios Kapyderm, Klasscolor product specifications and carton (Reg. DGFPS 1478-CS); Beautymarket.pt coverage of the KlassColor launch at Expocosmética, Porto.
Peer-reviewed sources above concern the underlying mechanisms of hair and scalp chemistry — pH, protein substantivity and barrier function — and are independent of Laboratorios Kapyderm. They substantiate the science Klasscolor is built on, not the finished product’s performance, which is the manufacturer’s to demonstrate.
Learn the Advanced Protocol
The carton teaches you the foundation. The Kapyderm Advanced Protocol — sequencing collagen through every phase, correcting compromised hair, finishing with the fiber stronger than it started — is taught, not printed. Kapyderm runs free professional training with our international educators. Not yet part of the network? There is exclusive territory open in your market right now.
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