Acrylic Resin

Acrylic Resin

Definition: A thermoplastic substance formed by the polymerization of the esters or amides in acrylic acid.

Overview

Acrylic resin is a versatile synthetic polymer widely used in picture framing, fine art, and decorative industries. It can be molded into sheets, cast into shapes, or dissolved into mediums and coatings. In the framing world, acrylic resin most often appears as the base material for acrylic glazing products, which serve as lightweight and shatter-resistant alternatives to glass.

Applications in Picture Framing

• Glazing: Acrylic resin sheets (commonly known as acrylic sheet) are used to protect artwork from dust, pollutants, and handling damage.
• Coatings and Sealants: Clear acrylic resins are often used as protective topcoats or varnishes for painted surfaces and works on paper.
• Adhesives: Acrylic resin is a component of many conservation-grade adhesives that offer durability without yellowing over time.
• Mixed Media: Artists frequently incorporate acrylic resin into mixed media works to create texture, gloss, or protective layers.

Benefits

• Lightweight: Far lighter than glass, reducing strain on hanging hardware and frames.
• Shatter-Resistant: Acrylic resin glazing does not break into dangerous shards, making it safer for shipping, galleries, and public installations.
• Optical Clarity: Offers excellent transparency and can be manufactured with anti-reflective or UV-filtering properties.
• Versatility: Can be formulated into adhesives, coatings, sheets, or molded parts.

Conservation and Archival Considerations

While acrylic resin is stable and resistant to yellowing compared to many other plastics, not all formulations are archival. Conservation-grade acrylic glazing products are engineered to block harmful UV rays and resist chemical outgassing. However, lower-quality acrylic sheets or coatings may discolor over decades, potentially altering the visual appearance of the framed work. For archival projects, always choose products labeled as museum-grade or conservation-approved, and avoid prolonged exposure to direct sunlight.

Common Misconceptions

• Not the Same as Epoxy: Acrylic resin and epoxy resin are different materials. Acrylics are lighter and more optically clear, while epoxies tend to yellow more over time.
• "Plexiglass" is a Brand: Plexiglass is just one trademarked brand of acrylic resin glazing; the material itself is simply acrylic.
• Not Always Archival: Some assume all acrylic products are conservation safe, but only museum-grade formulations meet archival standards.

Related Terms

• Acrylic Sheet
• Acrylic Glazing
• Mixed Media
• Clear Coat