Silk Fibroin Powder

Description

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Silk Fibroin Powder for Cosmetic Formulations

Product Overview

Silk Fibroin Powder is a finely processed natural protein material derived from degummed silk fibroin. Produced through specialized processing and physical pulverization, it is available in a range of particle sizes to meet different formulation and application requirements.

With an approximate molecular weight of 250,000, this powder is characterized by its white to slightly grayish-yellow appearance, neutral odor, and tasteless nature. It is slightly soluble in water and insoluble in alcohol and ether. Its distinctive protein structure and surface properties make it a functional ingredient for cosmetic formulations, particularly those designed for skin conditioning, moisture management, oil control, and soft-focus finishing effects.

Product Specifications

Silk Fibroin Powder is available in multiple particle-size grades, allowing formulators and ingredient buyers to select a suitable specification for their intended applications.

Items	Specification
Coarse silk powder	Average particle size: 40 micron
Superfine Silk Powder	Average particle size: 10 Microns
Superfine Silk Powder	Mean particle diameter: 5 micrometers
Ultrafine and ultra-micro silk powder	Mean particle diameter: 2 micrometers
Nanometer silk powder	Mean particle diameter: 350 nanometers

Key Quality Indicators

Item	Specification
Appearance	White to slightly grayish-yellow powder
Total Nitrogen	≥ 14.5%
Loss on Drying	≤ 6.0%
Residue on Ignition	≤ 4.0%
pH Value	5.0–7.0

Note: Particle size and quality indicators should be confirmed against the applicable product specification and quality documentation before formulation or procurement.

Functional Properties and Cosmetic Applications

1. Moisture Management and Skin Conditioning

Silk fibroin contains hydrophilic groups that contribute to its interaction with moisture. When incorporated into suitable cosmetic formulations, the powder can help support moisture retention and provide a smooth skin feel. Its moisture-related properties make it a potential ingredient for skincare products designed to maintain skin softness and improve the sensory experience of application.

2. Complementary Use in Sun Care Formulations

The structural characteristics of silk fibroin powder may influence the interaction of light with cosmetic formulations. It can be considered as a complementary ingredient in sunscreen products alongside established UV-filtering agents. Its use should be evaluated within the complete formulation, and the finished product must undergo appropriate testing to establish its actual sun protection performance.

3. Oil-Absorption Properties

Silk fibroin powder has oil-retention characteristics that make it relevant to formulations intended for oily or combination skin. Depending on the formulation and particle-size grade, it may contribute to oil management and help improve the feel of products applied to the skin.

4. Soft-Focus Finish and Natural Appearance

In color cosmetics and powder-based formulations, silk fibroin powder can help modify surface light reflection. When used with mica-based ingredients, it may contribute to a softer visual finish and a more natural-looking appearance on the skin. This property is relevant to formulations where a balanced, smooth cosmetic finish is desired.

5. Smooth Texture and Powder Formulation Compatibility

Compared with conventional powder ingredients such as talc and titanium dioxide, silk fibroin powder offers a different combination of material structure and sensory characteristics. It can be evaluated as an ingredient for formulations seeking a lightweight, smooth application feel and a comfortable finish. Final performance depends on the selected grade, ingredient compatibility, concentration, and formulation process.

Applications

Silk Fibroin Powder can be evaluated for use in a variety of cosmetic and personal care formulations, including:

• Skincare products focused on moisture management and skin conditioning

• Cosmetic powders and makeup formulations

• Products designed for oily and combination skin

• Powder-based formulations requiring a smooth sensory finish

• Sun care formulations as a complementary ingredient alongside suitable UV filters

The appropriate particle size and use level should be determined according to the formulation design, processing requirements, and finished-product testing.

Why Choose Silk Fibroin Powder?

• Multiple particle-size options: Available from coarse powder to nanometer-scale material.

• Protein-based material: Derived from degummed silk fibroin through specialized processing.

• Versatile formulation potential: Suitable for evaluation in skincare, color cosmetics, and other powder-based personal care products.

• Defined quality indicators: Key parameters include total nitrogen, loss on drying, residue on ignition, and pH.

• Application-oriented selection: Different particle-size grades support evaluation for different texture and formulation requirements.

Product Selection and Procurement

When sourcing Silk Fibroin Powder for commercial production, buyers should consider particle size, physicochemical specifications, formulation compatibility, and the quality documentation required for their target market.

For ingredient evaluation and bulk procurement, confirm the selected grade, available packaging, minimum order quantity, shelf life, storage conditions, and supporting technical documents with the supplier.

Silk Fibroin Powder provides cosmetic formulators and ingredient distributors with a silk-derived protein material that can be assessed for moisture-related functions, oil management, and sensory enhancement in a range of personal care applications.