| Author | Anon. |
| Title | Knight Optical Ltd |
| Type | Web Site/Page |
| Source | www.knightoptical.com |
| Review (by Malcolm Storey) | "Proper" polaroid sheet - HN22 - is no longer manufactured, but this company have a supply. It’s quite a thick and fragile material so you’d be best to get them to cut it for you. A lacquered finish is available for scratch protection. With crossed-polaroids of HN22 the background will be completely black to the eye so this is the polaroid to use for photography. |
| Website url | www.knightoptical.com |
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