BUTTER-C
Body care
Elbow & knee cream OEM/ODM manufacturing
Elbow & Knee Cream · Rough Skin Care · OEM/ODM
Elbows, knees and ankles take constant friction and pressure, so their stratum corneum is thicker, drier and often darker than the surrounding skin. A regular body moisturizer is not enough to soften these areas; they need a dedicated product with stratum corneum softeners, rich humectants and a durable occlusive layer. It is a small category with clear demand, an easy way for a body care brand to stand out, and a natural companion to body lotion or body scrub. Butter-C offers full-service OEM/ODM manufacturing, from formula development to labeled finished goods and the cosmetic product notification dossier.
Formula base
Soften the stratum corneum, hydrate and seal in moisture
Thick skin needs three actions at once: soften excess stratum corneum, add water, and hold that water in with a durable film.
Stratum corneum softeners
Urea at higher levels than in a regular moisturizer, Lactic Acid and lactate salts, low-level Salicylic Acid — loosen the thick stratum corneum so skin feels softer and smoother.
Humectants
Glycerin, Sodium Lactate, Sodium PCA — components of the natural moisturizing factor that hold water in the stratum corneum.
Occlusives
Pure petrolatum, lanolin, shea butter, waxes — form a water-retaining film on skin that rubs frequently.
Tone-evening actives
Niacinamide, licorice extract, Tranexamic Acid — help darker areas look more even in tone with regular use.
Key technical points
Four factors that determine the quality of a thick-skin cream
Urea stability in the cream
Urea slowly breaks down into ammonia, raising pH and producing an odor over time. A lactate buffer, the right pH and adding Urea during the cool-down phase keep the cream stable.
Mild acid levels
Thick skin tolerates acids better than facial skin, but the skin around elbows and knees can still sting; concentration and pH are tuned for daily use.
A non-greasy occlusive layer
Rich occlusives can feel greasy and transfer to clothing. Polymers and mattifying powders keep the film durable yet dry to the touch.
Convenient formats
Small tubes, twist-up sticks or roll-ons apply to the exact area without messy hands; each format needs its own formula base.
Three formulation directions
Three product formats for thick skin
Softening Urea cream
Rich cream with Urea and Lactic Acid to soften the stratum corneum; suits very dry, rough skin and dry seasons.
Tone-evening cream for darker areas
Niacinamide, licorice and Tranexamic Acid combined with mild softeners; helps elbows and knees look more even in tone over time.
Stick balm
Anhydrous base of butters, waxes and oils; twist up and apply directly, pocket-sized. Cannot carry Urea levels as high as a cream.
Packaging designed with the formula
Aluminum or multilayer plastic tubes, twist-up sticks, small jars. Urea and acids need tight packaging that withstands the cream's pH.
Parameters we monitor
What our R&D lab measures on every sample
These are the parameters Butter-C monitors 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.
- pH over time
- Measured at manufacture and after aging tests; a rising pH signals Urea breakdown.
- Odor
- Monitored for ammonia odor after storage at 40°C.
- Emulsion stability
- Centrifugation, freeze–thaw cycling, storage at 40°C; monitored for separation and Urea crystallization.
- Hardness (stick format)
- Checks hardness, glide on application and sweating of the stick at high temperature.
- Microbiology and preservative challenge
- Tested at a GLP / ISO 17025-accredited laboratory; preservative challenge test per ISO 11930.
- On-skin evaluation
- Stinging, greasiness and skin softness after a single and repeated use.
- Restricted active content
- Salicylic Acid and other restricted actives are tracked per formula and tested when needed.
- Packaging compatibility
- Monitored for aluminum tube corrosion, tube swelling and cap leakage.
Claims
Writing claims within cosmetic scope
Dark, rough skin is easily described beyond cosmetic scope. Butter-C reviews the wording on labels and marketing materials while preparing the cosmetic product notification.
Softens thick, rough skin
Instead of: treats hyperkeratosis, treats calluses.
Helps darker areas look more even in tone
Instead of: treats dark knees, treats dark elbows, bleaching.
Deeply moisturizes dry skin
Instead of: treats cracked skin, treats eczema.
Skin feels smoother to the touch
Instead of: skin regeneration, skin peeling.
Directions
State clearly not to apply on broken skin; if the formula contains acids, advise covering up or using sunscreen on exposed areas.
Results over time
State a number of weeks only when backed by a user evaluation.
Manufacturing specifications
Current capabilities
- Texture
- Rich cream, light cream, stick balm.
- Format
- Tube, small jar, twist-up stick. Net weight agreed during packaging selection.
- Minimum order quantity
- Agreed per order.
- Testing
- Performed at a GLP / ISO 17025-accredited laboratory; a certificate of analysis is delivered with every batch.
- Documentation
- Product Information File (PIF) and cosmetic product notification prepared by Butter-C.
- Packaging
- Label design, printing and packing run in parallel with formula development.
Suggested product concept
Urea and Niacinamide cream for elbows and knees
A product concept to help you picture the possibilities — not a ready-made product for sale. The actual formula is developed around your brand positioning and price range.
Urea and Lactic Acid
Soften the thick stratum corneum; a lactate buffer keeps pH stable throughout shelf life.
Niacinamide
Helps darker areas look more even in tone with daily use.
A dry-touch occlusive layer
Shea butter and pure petrolatum hold in moisture; mattifying powder limits greasiness.
50 g tube
Compact tube with a narrow nozzle to dispense just the amount needed.
Customization options
What you can specify
The same product format can serve very different customer groups. Tell us your requirements in the areas below and our team of pharmacists will develop a matching formula.
Focus
Softening rough skin, evening out darker areas, or both.
Product format
Cream, stick balm, roll-on.
Urea and acid level
Mild for daily use or stronger for very thick skin.
Hero actives
Urea, Niacinamide, licorice, Tranexamic Acid, ceramides, shea butter.
Scent
Fragrance-free or lightly scented.
Ingredient positioning
Mineral oil-free, lanolin-free, vegan — please specify at the outset.
Further reading
Related articles
Body scrub manufacturing
Removing excess dead skin before moisturizing.
Body lotion manufacturing
Daily moisturizing for the whole body.
Managing skin pigmentation
Why skin under pressure is often darker (in Vietnamese).
How actives feel on skin
Mild stinging with Urea and acids (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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