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Have you ever wondered how rubber spatulas and spoons get their vibrant colors? If these products are made of silicone, it’s likely that Holland Colours’ colorants for liquid silicone rubber are responsible for their eye-catching hues.

Liquid silicone rubber (LSR) is a highly flexible and durable material used across various industries, including automotive, healthcare, aviation, consumer goods and electronics. Besides kitchenware, LSR is used to manufacture medical devices, seals, gaskets, wearable technology and other components.

Why Add Colorants?

LSR is inherently translucent, so colorants are added to produce vibrant and appealing parts, components, instruments and other goods. Holland Colours’ colorants for liquid silicone rubber offer pigmentation solutions to achieve the desired shade according to client specifications.

Manufacturers seek custom colors for their end products rather than settling for standard options. Specific hues may be required to reflect corporate branding, meet industry and consumer preferences, or enhance the aesthetic appeal of a product.

Additionally, manufacturers may opt to provide certain parts in distinct colors to differentiate them from similar-looking components and enable customers to color-code parts for better inventory management.

Holland Colours’ colorants for LSR are available in both standard and custom colors. They are added to LSRs during the injection molding process.

Holcosil LSR Line

Holland Colours created its Holcosil® line specifically for LSR injection molding applications.

These color pastes blend easily into compounds and exhibit excellent dispersion allowing consistent coloring throughout the part without streaks. The colorants are manufactured to minimize residual solvents and odors, and to ensure the uniform dispersion of concentrated pigment amounts in silicone. This facilitates efficient and consistent coloring of plastic products during the molding process, with colors remaining vibrant throughout the product’s lifespan.

Holcosil LSR colorants offer unique properties that improve process efficiency and enhance product aesthetics including:

• Custom color and viscosity matching
• High concentration for low-dosage use
• Thermal stability up to 250°C
• Simplified, less labor-intensive mixing
• Stability and flexibility for rigorous applications
• Environmental safety, with minimized residual solvents and odors
• Consistent colors with no migration or streaks
• Compliance with strict FDA and BgVV food contact regulations
• Viscosity ranging from 15,000 to 30,000 MPa

Range of LSR Applications

Holcosil LSR colorants for liquid silicone rubber can add hue to a range of products including:

• Kitchen utensils
• Armbands
• Automotive parts and equipment
• Baby bottle nipples
• Mobile phone cases
• Electronic parts
• Bottles
• Wearable medical and monitoring devices

H.M. Royal distributes and provides technical support for Holland Colours’ colorants for liquid silicone rubber. Working closely with customers, we deliver custom solutions for precise color matching, consistency, rapid turnaround and fast delivery in both short and high runs. Please contact our team of raw material experts to discuss your requirements.