Short answer: Glazing is the clear protective layer, glass or acrylic, placed in front of a framed picture. It guards the work from dirt, pollutants and handling. Good practice is to use a type that filters ultraviolet light.
What two sources say about Glazing
| Source page | Publisher | What the page says |
|---|---|---|
| Picture frame - Wikipedia | Wikipedia | Describes glazing as an optional protective layer of glass or acrylic. It says works on paper are usually glazed, glazing should filter UV, and anti-static glazing helps with friable media. |
| Matting and Framing for Art and Artifacts on Paper (Preservation Leaflet 4.10) | Northeast Document Conservation Center (NEDCC) | Explains glazing as glass or acrylic that protects paper and photographs from dirt, pollutants and handling. It compares the two materials and recommends UV-filtering glazing. |
Key points
- Glazing is an optional clear layer of glass or acrylic over the artwork. [1, 2]
- Works on paper are usually glazed. [1]
- It protects the work from dirt, pollutants and handling. [2]
- Glazing should filter ultraviolet light; one source asks for at least 99 percent UV filtering. [1, 2]
- Glass is heavier and breaks more easily; acrylic is lighter, scratches more easily and holds static. [2]
- Anti-static glazing suits objects with loose or degraded media; some displays use no glazing at all. [1]
Glazing compared with Acrylic glazing (versus glass)
| Aspect | Glazing | Acrylic glazing (versus glass) | Source |
|---|---|---|---|
| Weight | Glass is heavier. | Acrylic is lighter. | [2] |
| Breakage | Glass breaks more easily. | Acrylic is not described as breaking as easily. | [2] |
| Scratching | Glass is not described as scratching easily. | Acrylic scratches more easily. | [2] |
| Static | Not noted for glass. | Acrylic holds a static charge; anti-static types exist. | [1, 2] |
Where sources differ
Spare term, used because the five-term list had weaker pairs. Wikipedia says glazing 'should' filter UV for lasting works; NEDCC gives the 99 percent figure for conservation work.
Questions to ask a supplier about Glazing
- [ ] Is the glazing glass or acrylic, and what thickness?
- [ ] What percentage of UV does it block?
- [ ] Is it anti-reflective, anti-static or plain?
- [ ] How is the glazing packed to avoid breakage in transit?
- [ ] Is it cut to size by the supplier?
Read next on this site
- Acrylic vs Glass Glazing for Picture Frames: A Buyer's Guide
- UV-filtering glazing: what it blocks and what it does not
- Packing glass and acrylic fronted frames for transport: what the sources say and where they differ
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Sources: [1] Wikipedia, fetched 2026-11-12; [2] Northeast Document Conservation Center (NEDCC), fetched 2026-11-12. As of 2026-11-12. General information, not legal, customs or tax advice. Wording is paraphrased from the pages linked; your written quote and contract govern.