Polyester Resin

Polyester Resin

Polyester resin is a synthetic polymer material widely used in picture framing, artwork coatings, and other applications where a hard, durable, and glossy surface is desired. It is formed by the chemical reaction of polyesters with a cross-linking agent, typically a peroxide, which creates a rigid, thermoset plastic once cured. Polyester resin is valued for its strength, impact resistance, and ability to hold color or embed decorative elements.

Uses in Picture Framing

• As a coating for decorative frame mouldings to achieve a glossy, finished appearance.
• Embedding or encasing objects or artwork for display purposes.
• Creating clear or tinted protective layers over prints, photographs, or three-dimensional pieces.
• Used in combination with fiberglass or other reinforcement materials for increased durability.

Properties

• High gloss and smooth finish when cured.
• Strong and resistant to impact, scratches, and heat.
• Lightweight compared to metals or glass, making it easier to handle in framing.
• Non-archival in some formulations, as certain resins may yellow or emit VOCs over time.

Application

• Applied in liquid form and then cured, often with heat or UV light depending on the formulation.
• Can be sanded, polished, or painted after curing to achieve desired visual effects.
• May require mold release agents if used in casting or moulding applications.

Advantages

• Provides a durable and aesthetically pleasing finish.
• Allows for embedding of objects for unique display effects.
• Resistant to many physical impacts and environmental stressors.

Limitations

• May not be suitable for long-term archival framing without proper UV protection.
• Requires careful handling during application due to chemical fumes and curing requirements.

Related Terms

• Substrate
• Restoration
• Razor Blade
• Tooth