Definition: Offset refers to a type of frame hardware designed to secure artwork, mats, glazing, and backing within a picture frame when the depth of the artwork or framing materials extends beyond-or falls short of-the rabbet depth. Offsets are shaped metal tabs, bent at varying depths, and attached with small screws to hold contents flush and secure against the back of the frame.

Overview

Offsets are essential in framing projects where the thickness of the artwork or glazing does not align neatly with the frame's rabbet. By "offsetting" the attachment point, these brackets adapt to materials that are either proud (sticking out past the rabbet) or shy (recessed within it). They offer a practical, inexpensive, and secure solution for keeping frame packages tightly fitted without applying excessive pressure to delicate materials.

Types of Offsets

Flat Offsets: Designed for use when the artwork sits nearly flush with the rabbet.
Shallow Offsets: Used for slimmer packages where materials sit below the rabbet depth.
Deep Offsets: Provide greater reach for thicker art, canvases, or multiple mats.

Applications

Securing stretched canvases into floater frames or standard mouldings.
Holding thick multi-mat packages in place within a deep rabbet.
Adapting frames for glazing upgrades (such as thicker museum glass or acrylic).
Framing items with unconventional thicknesses, such as shadowboxes or textile art.

Installation

Offsets are attached with small screws into the back of the frame moulding.
They can be removed or replaced without damaging the artwork.
Available in multiple depths (e.g., 1/8", 1/4", 1/2", 3/4", etc.) to match framing needs.

Best Practices

Choose the correct offset depth to avoid pressing too tightly against artwork or glazing.
Use felt pads or protective spacers if offsets come into direct contact with delicate surfaces.
Ensure screws are properly anchored without splitting wooden mouldings.
Inspect periodically for loosening in large or heavy frames.

Offset