BUTTER-C
Hair care
2-in-1 gray coverage shampoo OEM/ODM manufacturing
2-in-1 Grey Coverage Shampoo · Hair Colour Shampoo · OEM/ODM
Gray coverage shampoo is an at-home hair color option for people who are not used to cream dyes: mix two parts, work into the hair like a shampoo, leave for a few minutes and rinse, and gray hair is colored black or brown. Demand comes from middle-aged and older consumers and men who want to cover gray hair quickly, simply and affordably. In essence, this is a hair dye product: color is formed by oxidative dyes reacting directly on the hair shaft, and these dyes are all on the restricted list with concentration limits and mandatory allergy warnings on the label. Following the rules protects both consumers and your brand. Butter-C offers full-service OEM/ODM manufacturing, from formula development to labeled finished goods with a cosmetic product notification dossier.
Formula base
Color part, developer part and shampoo base
Gray coverage shampoo usually consists of two separate parts, mixed just before use so the color-forming reaction takes place on the hair.
Color part
Oxidative dyes (primary intermediates and couplers) in a shampoo base with an alkalizing agent; their ratio determines a black, dark brown or brown shade.
Developer part
Low-concentration Hydrogen Peroxide in a stable base; when mixed with the color part it triggers the color-forming reaction.
Shampoo and conditioning base
Surfactants provide light foam for even application like a shampoo; conditioning agents and plant oils reduce dryness after coloring.
Herbal extracts
Fo-ti (he shou wu), honey locust, ginger and goosegrass support a herbal story. Herbs do not replace the dyes — the color still comes from oxidative dyes, and the label must list ingredients accurately.
Key technical points
Four factors that define gray coverage shampoo quality
Dyes within limits
The concentration of each dye after mixing is calculated against the limits of the permitted list; for example, p-Phenylenediamine does not exceed 2% on the hair after mixing.
Even gray coverage in a short time
Dye ratio, alkalinity and viscosity are adjusted so the mixture coats the hair evenly and develops color within the time stated on the label.
Both parts stable in the sachet
The color part can oxidize inside the sachet if air gets in; antioxidants and barrier packaging keep the color unchanged until use.
Complete label warnings
Mixing ratio, allergy warning, pre-use skin test instructions, wearing gloves, not for use on persons under 16 — mandatory content under the restricted substances list.
Three formulation directions
Three common gray coverage formats
Two-sachet gray coverage shampoo
Two small sachets mixed for single use; fast color, convenient, low price. The most common format in the domestic market.
Dual-chamber bottle gray coverage shampoo
The two parts are stored separately in a twin bottle or two bottles; multiple uses, with the pump dispensing the correct ratio.
Non-oxidative herbal gray coverage
Henna powder and indigo powder — color develops more slowly and lighter, with longer processing time; suits a natural positioning, but jet black is hard to achieve.
Packaging must be planned with the formula
Multi-layer aluminum barrier sachets, twin bottles, boxes with gloves and an instruction leaflet. The developer part needs peroxide-resistant packaging.
Parameters we monitor
What our R&D lab measures on every sample
Below are the parameters Butter-C tracks during formula development and scale-up to production. Specific limits are agreed with you on the approved sample and then written into the product's in-house specification.
- Dye content
- Assayed in the finished product and checked against the limits after mixing at the ratio stated on the label.
- Hydrogen Peroxide content
- Assayed in the developer part, with stability tracked over time.
- Coverage
- Test dyeing on standard gray hair swatches for the instructed time; color compared with the approved sample.
- Color fastness
- Color assessed after multiple washes with a regular shampoo.
- pH and viscosity
- Measured on each part and on the mixture after mixing.
- Stability in packaging
- Monitoring color change of the color part, loss of peroxide content and sachet swelling after aging tests.
- Microbiology
- Tested at a GLP / ISO 17025-accredited laboratory.
- Label and leaflet content
- Review of mandatory warnings, mixing ratio and skin test instructions.
Claims
Keeping claims within cosmetic scope
Hair coloring is a valid cosmetic function; preventing gray hair or turning hair black again from the root is not. Butter-C reviews the wording on labels and marketing materials while preparing the cosmetic product notification.
Colors gray hair black or brown
Instead of: treats gray hair, turns hair black from the root, prevents gray hair from growing back.
Washes and colors in one step
Describes how to use; clearly state the time on the hair.
Contains herbal extracts
Instead of: 100% herbal, chemical-free — when the formula contains oxidative dyes.
Soft hair after coloring
Instead of: repairs hair, nourishes hair from the root.
Mandatory warnings
Can cause severe allergic reactions; do a skin test 48 hours before use; wear gloves; not for use on persons under 16, on a damaged scalp, or by anyone who has reacted to a hair dye or a black henna tattoo.
Not for eyebrows or eyelashes
Clearly stated on the label as required for oxidative dyes.
Manufacturing specifications
Current capabilities
- Texture
- Two-part mix shampoo; herbal powder.
- Format
- Single-use sachet pairs, dual-chamber bottles, boxes with gloves and an instruction leaflet. Volume agreed when selecting packaging.
- Minimum order quantity
- Agreed per order and per shade.
- Testing
- Performed at a GLP / ISO 17025-accredited laboratory, including dye and peroxide assays; a certificate of analysis is delivered with every batch.
- Documentation
- Product Information File (PIF) and cosmetic product notification dossier prepared by Butter-C.
- Packaging
- Label and leaflet design, printing and packing run in parallel with formula development.
Suggested product concept
Dark brown gray coverage shampoo in single-use sachet pairs
A product concept to help you visualize the possibilities — not a ready-made product for sale. The actual formula is developed around your brand positioning and price range.
Natural dark brown
A dark brown shade that suits Vietnamese consumers, covering gray without a harsh black.
Two sachets mixed for single use
No leftover mixture and no oxidation after opening; box of ten sachet pairs.
Conditioning shampoo base
Light foam that spreads evenly like a shampoo; plant oils help keep hair from feeling dry after rinsing.
Gloves and skin test instructions included
The box contains gloves and a leaflet with the mandatory warnings clearly printed.
Customization options
What you can specify
The same product type can target very different customers depending on the brand. Tell us your requirements in the areas below, and our team of pharmacists will develop a matching formula.
Shade
Black, dark brown, brown, chestnut brown; each shade is a separate formula.
Packaging format
Single-use sachet pairs, dual-chamber bottle.
Development time
Desired time on the hair; this affects dye concentration and alkalinity.
Hero herb
Fo-ti, honey locust, ginger, goosegrass, ginseng.
Natural direction
Non-oxidative herbal gray coverage with henna and indigo — lighter color, longer processing time.
Target users
Men, women, older adults.
Further reading
Related topics
Herbal shampoo manufacturing
An everyday shampoo to maintain color after gray coverage.
Cosmetic labeling rules
Mandatory warnings on hair dye product labels (in Vietnamese).
The cosmetic PIF
Safety assessment for products containing restricted substances (in Vietnamese).
Raw material quality management
Incoming control of dyes and peroxide (in Vietnamese).
How we work
From idea to finished batch
Eight steps and three milestones signed off by both sides: approved sample, notification number, finished batch. Step-by-step details (in Vietnamese) →
Get started
Tell us about the product you plan to launch
Send us your product direction and expected volume. Our team will get back to you during business hours (Vietnam time, GMT+7).
Head office: Huu Le village, Dai Thanh commune, Hanoi · Factory: Thanh Oai Industrial Cluster, Binh Minh commune, Hanoi, Vietnam
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