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Advertising supplement provided The Window & Door Manufacturers Association

Finish Systems — The system that is most often specified is a TR/OP 6 - Catalyzed Polyurethane which provides the highest performance properties of production finishes. The TR/OP6 finishes are normally roll coated with high solids, volatile organic compound (VOC) free material, and cured using ultraviolet (UV) light technology. This is opposed to older technology where a low solids, solvent (VOC) based material is sprayed. Other finishes that are sometimes specified are TR/OP - 2 Pre-Catalyzed Lacquer and a TR/OP 4 - Conversion Varnish. The performance properties of these finishes are below that of a TR/OP 6 but do provide an architectural/commercial finish. They are typically spray applied with solvent based materials.

 

The addition of Low Pressure Decorative Laminate doors and other faces, finishes species and materials reflects new product trends. Source: The Maiman Co., Springfield, Mo.

A chart describes all three finish systems, specifically detailing how well each system resists a variety of chemicals and solutions, wears, and how well the finish adheres to the substrate and underlying coats of finishing material. Chemical descriptions may vary from those printed, but performance levels of a finish system must meet or exceed those printed to be considered equal.

Low Pressure Decorative Laminates (LPDL) — LPDL has been added to the standard as an alternate face material. This material is a decorative laminate paper that has been saturated in reactive resins, and hot pressed to the face of the door, creating a hard crosslinked thermosetting permanent bond. Many colors and woodgrain patterns are available and the addition of LPDL reflects new product trends in the manufacturing community.