A standard fergo is a high resolution transparency with a dense black that can be either dark red, grey or green if held to a pure light source, but ultimately is black in projection terms until UV degradation occurs. Colours are rich and saturated.
Noticeable UV degradation from a completely black image will take about 20 minutes at full with both a GKV 600w and a T/27 650w lamp in a properly set up Pacific. **
In conjunction with a UV filter (rosco or Lee) in the rear gate of a Pacific you can expect 4 times the UV life, with a Selecon UV holder you can expect 8 times the life.
It is worth mentioning that the colour and density of the image have a direct impact on the life of the image as does intensity of the luminare (assuming tungsten) which can be dropped without noticeable change and significantly add life, most examples shown in the showcase are limited in this way to 80% or less in output.
These fixtures were also over flattened to minimise gate temperature.
With all plastic projections it is essential to trial both the image for longevity as well as aesthetics.
For detailed set up procedure in a Selecon Pacific and general information on plastic projections click here:
** No accurate data is yet available on luminaries using Image Pro other than the Selecon Pacific.