Contrast Viewing Surfaces
Harkness high contrast surfaces are ideal for enhancing contrast to compensate for video projectors that are not optimised to project very dark colours.
Harkness high contrast surfaces are designed for use with LCD or DLP video projectors that are not optimised to project black/near black colours. The grey surface reinforces the blacks and enhances the contrast. They are intended for a variety of auditoria, generally in dark conditions, though they can also minimise the effects of ambient light. Our proprietary and unique seam welding process ensures our screens have no visible seams under projection conditions. Screens are available in either perforated or non perforated forms depending on speaker placement.
- High Contrast Grey is a coated vinyl with a choice of gain levels 0.4. and 0.8, and is available perforated
- Contrast Grey is a non-coated vinyl with a gain of 0.7, and is available non-perforated for screens and off the roll at 2m wide
- Starlight is a specially formulated coating which gives the optimum contrast enhancement, excellent for home cinema applications. The gain level of 1.0 assists brightness and minimises the effect of ambient light. It is available perforated.
- Cinema
- Events
- Home cinema
- Film production
Screens are perforated to facilitate the acoustic performance of behind-screen speakers. For most cinema auditoria, standard perf pattern is used. For close viewing (less than 5m/16ft), mini-perf pattern is recommended. It has smaller diameter perforations (less than half the diameter of other Harkness projection surfaces) to provide the ultimate surface type for close viewing conditions.
Non-perforated screens are available for use when there are no speakers situated behind the screen.
| High Contrast Grey | Contrast Grey | Starlight | |
| Material | PVC with matt grey coating | PVC | PVC with coated finish |
| Colour | Matt grey | Grey | Grey |
| Perforation | standard or mini-perf | None | Standard perf, mini-perf, mini-perf super |
| Weight | 0.50 kg/m2 (0.10 lb/ft2) | 0.43 kg/m2 (0.09 lb/ft2) | 0.50 kg/m2 (0.10 lb/ft2) |
| Thickness | 0.3mm | 0.3mm | 0.3mm |
| Maximum size | Europe: 33 x 11m (108' 3" x 36' 1") | Subject to enquiry | Europe: 33 x 11m (108' 3" x 36' 1") |
| Roll width | na | na | na |
| Packing method | Rolled | Folded | Rolled |
| Fire classification | UK BS5867 PT 2
France M1 |
UK |
UK BS 5867 Part 2 |
High Contrast Grey
- Web and eye (grommet). Triple fold web integral with surface
- Preformed pipe pocket any size on any side
- Cloth web and fixings (snaps) for press stud frames (UK Matt Plus only)
- Straight sides or shaped to special order (Matt Plus only)
- Cut square (unfinished edge)
Contrast Grey
- Web and eye (grommet) with 6" (150mm) spacing.
- Preformed pipe pocket.
- Cut oversize or cut square (unfinished)
Screens should normally be transported and stored at temperatures between 5°C and 30°C (40°F and 85°F), with relative humidity less than 80%.
If screens are very cold (e.g. following air transport) then they must be allowed to warm up before unpacking, otherwise cold cracking may occur. Screens should be installed within a maximum of 2 months of shipping. Packages should be handled with care to avoid damage.
The general environment where the screen is installed should be kept reasonably clean to avoid dirt and dust build-up. Screens can be periodically cleaned using a soft brush or cloth, doing this vertically with limited pressure. Screens can be cleaned using a damp cloth wetted with water and a mild detergent. Under no circumstances should screens be cleaned with abrasive materials or harsh chemicals such as acids, bleaches or solvents. Harkness Screens is not liable for damage caused to screens through the use of inappropriate cleaning methods or chemicals.
For information on Installation, please see the Resources section of our website.
