Polypropylene (PP)

Polypropylene (PP)

Polypropylene (PP) is a versatile thermoplastic polymer widely used in packaging, storage, and framing applications. It is known for being lightweight, durable, and chemically inert, making it suitable for archival and protective uses. Polypropylene can be produced in clear, opaque, or colored forms, and it is resistant to moisture, many chemicals, and physical wear.

Uses in Art and Framing

• Protective storage sleeves for prints, photographs, and documents.
• Backing boards for frames, offering lightweight support for artwork.
• Packaging materials for shipping and handling artwork safely.
• Sheet material for display purposes, such as signage or temporary framing.

Properties

• Lightweight yet rigid, providing support without excessive bulk.
• Archival-grade formulations are chemically inert and do not off-gas harmful substances.
• Moisture-resistant, preventing warping or degradation in humid conditions.
• Durable and resistant to tearing, bending, and many environmental stresses.
• Can be produced as biaxially oriented polypropylene (BOPP) for enhanced clarity and strength.

Advantages

• Safe for long-term contact with artwork when archival-grade PP is used.
• Cost-effective and widely available.
• Lightweight and easy to handle for framing and storage.
• Resistant to moisture, acids, and most solvents.

Limitations

• Non-archival grades may contain additives that could harm artwork over time.
• Less rigid than some alternative backing materials like MDF or hardboard.
• Prone to static build-up, which can attract dust and particles.

Related Terms

• Crystal Clear Bags
• Gridwall Panels
• Gridwall
• Biaxially Oriented Polypropylene Bopp