Description
Pearl white BOPP film is a non-sealable biaxially oriented polypropylene film with a white, voided structure that produces the characteristic pearlescent appearance widely used in premium labels, flexible packaging, and decorative applications. The film is lighter than standard white BOPP of the same thickness because the voiding process replaces some polymer mass with microscopic air cavities, reducing material weight while maintaining good stiffness and dimensional stability.
The pearl white structure provides high opacity, making the film an effective base for printed label graphics and packaging designs where a bright white background with a subtle sheen is required. The surface accepts printing inks reliably and is particularly well suited to applications where the packaging material itself contributes to the premium positioning of the product on shelf.
Label and Lamination Applications
Pearl white BOPP film is one of the most popular face stock materials for pressure-sensitive labels in Europe, used across cosmetics, personal care, food, and household product categories. Its combination of whiteness, printability, and lightweight structure makes it a practical and cost-effective choice compared to white paper label stock in environments where moisture resistance and durability matter.
As a non-sealable film, pearl white BOPP is also widely used as an outer layer in laminated flexible packaging structures, where it provides the decorative and structural properties of the outer ply while a separate heat-sealable inner film forms the seal. This split-functionality approach allows each layer to be optimised for its specific role in the packaging structure.
Frequently Asked Questions
What is the difference between pearl white BOPP and standard white BOPP film?
Standard white BOPP film achieves its opacity from titanium dioxide pigmentation within a solid polymer matrix. Pearl white BOPP uses a voiding process that creates internal air cavities, producing whiteness through light scattering rather than pigmentation alone. The pearl white structure is lighter per square metre at a given thickness, and the surface has a subtle lustrous quality that standard white BOPP does not have. Both are effective for opaque packaging, but pearl white offers a more distinctive, upscale appearance.
Can pearl white BOPP film be used as label face stock?
Yes, this is one of its most common applications in Europe. Pearl white BOPP label face stock is converted by pressure-sensitive label manufacturers into labels used across cosmetics, personal care, food, and beverage products. It is more moisture-resistant than paper label stock and provides a consistent white surface for printing, making it a popular choice for products stored in refrigerators, bathrooms, and other humid environments.
Is pearl white BOPP suitable for in-mould labeling?
Yes, certain grades of pearl white BOPP are specifically engineered for in-mould labeling (IML) applications, where the label is placed inside the mould and fused to the container during injection moulding or blow moulding. IML grades have carefully controlled shrinkage characteristics and specific surface properties. Please confirm your IML application details with NovoPacks to ensure the correct grade is selected.
How does the printing quality on pearl white BOPP compare to paper?
Pearl white BOPP is dimensionally stable and does not absorb moisture, which means it does not cockle or expand during web printing the way paper can. This allows tighter print register and more consistent colour across long runs. The smooth surface gives excellent ink lay-down and glossy ink finishes appear vibrant. UV printing and UV coating are well suited to pearl white BOPP, producing a very high-quality finish that is difficult to achieve on paper substrates.
What thicknesses are commonly available for pearl white BOPP film?
Pearl white BOPP is available in thicknesses from approximately 30 to 80 microns. Label face stock typically falls in the 40 to 60 micron range, while lamination applications may use thinner or thicker grades depending on the stiffness requirements of the overall structure. NovoPacks can advise on the most appropriate specification for your converting process.