Supergel Filters
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Rosco's premium filter range was introduced in Europe in 1976. The original high temperature filter, Supergel's unique engineering gives it unsurpassed colour durability and heat resistance.
Supergel is supplied either as sheets: 50 x 61 cm, or rolls: 61 cm x 7.62 m.
The Supergel range contains 129 colours and 16 diffusion filters. Selected by designers for its superior range of colour, Supergel is made from body colored, extruded polycarbonate - a unique, engineered colour filter providing the longest lasting colour available. It offers incredible durability and meets the most stringent international guidelines for fire retardance, including the B1 and M1 standards.
How to Read an SED curve
The spectral energy distribution curve of each filter describes the wavelengths of colour transmitted throug the individual filters. For example, Supergel #312 transmits approximately 80% of the red and green energy above 500nm in the spectrum but only a small amount of deep blue/indigo. The result is a strong, clean yellow colour with just enough blue to prevent it from becoming an acid yellow like Supergel 10. The Transmission Percentage refers to overall light transmission that is allowed to pass through each individual filter, based on a Tungsten light source, Illuminant A.
Durability
The life of colour filters depends on many variables: the colour, the instrument and lamp used, the dimmer level, and the amount of time the light is running. For these reasons it is impossible to assign a "life" for each filter. Dark green and dark blue filters usually burn out fastest, because they absorb the most infrared energy. When darker, more saturated colours are needed try to select a colour that transmits high amounts of energy above the 700 nm range. You can find this information by looking at the Spectral Energy Distribution (S.E.D.) curve, by clicking on the graph next to each colour below. 700 nm may also transmit high levels in the infrared range above 700 nm.
To prolong the life of a colour filter, align your ellipsoidal lamp to a flat field focus, in order to eliminate the hot spot. Increasing the distance between the lamp and the filter by using a top hat or barn door will also reduce the heat on the filter, extending it's life. In more critical situations, use Rosco Heat Shield or Thermashield to prolong the life of your colour filters.
Never use a plastic filter directly in front of an open faced lamp. Always allow a suitable air gap between the exposed lamp and the filter, 2-3 (50-75mm) inches is recommended.
Sheets are priced at 4.00 and rolls at 50.00 each
Click on this icon 
View the Spectral Energy Distribution Curve shown next to each color filter to view its Spectral Energy Distribution curve.
Please note, colour filters are arranged in Swatchbook order.
