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A range of diffusion materials adapted from cinematography-used for softening the shadow of the beam while maintaining a relatively high color temperature because of the use of ultra-white pigments in the manufacturing process.To select from a color chart please Click hereRosco's premier range of filters, Roscolux, is manufactured in a unique technology to insure the longest possible life under hot theatrical lights. Three discrete layers are combined in a tri-extrusion process. By sealing the colored layer between two microscopically thin layers of clear film, dye migration is minimized and effective life is extended. Roscolux (sold under the trade name "Supergel" overseas) is currently the most widely used filter range in the world.Roscolux is comprised of two types of plastic. More than 65% of the line is made from co-extruded polycarbonate plastic. The remainder of the line is deep dyed polyester.Ordinary color filter is manufactured by surface coating clear polyester plastic film. In essence, the color is painted onto the surface. This means that heat and physical abrasion can easily remove the dye, resulting in quick fading and scratching.Available in sheets of 20in. x 24in. (50cm x 61cm) or rolls of 24in. x 25ft. (61cm x 7.62m). If you require rolls of larger dimensions the Cinelux line of filters is available in rolls of 48in. x 25ft. (122cm x 7.62m).
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By Matthew Montchalin (Happy Valley Oregon)
When it arrived, it was a translucent plastic material that was too thick to cut with your hands. I had to use a pair of scissors to cut it down to size. The stuff that arrives is big enough to cover the mouth of a PAR64 or PAR56, but if you want to use it with a PAR38 or PAR46, you will certainly want to cut it down to size.
My experience with diffusion materials for lights is rather limited. At the previous film shoot I was at, I was using only one rack of PAR lights. All four of the lights were covered with a diffusion fabric different from what I just bought. Instead of a thick kind of plastic, it was a polyester/muslin fabric that was made out of something highly similar to "cling free" squares. It resembled, very closely, those four inch squares of deodorizing fabric squares that you put into your dryer when you tumble your freshly washed clothes. Some people call them "tumble dries." Now, what I had experience with, was pretty good for what it did, but this tough plastic is so much better, it doesn't block as much light (which is a good thing, as you can use this diffusion material on smaller PAR lights). For what it's worth, I looked into buying ordinary muslin before buying this, and the local crafts store would have sold me some yards of muslin at $17 bucks or so. This product, as of the year 2010, cost only $6, so I saved a good amount of money in that regard, and the stuff looks a lot better too.
If you have already tried making your own scrims out of doors using plastic/nylon screen, or if you have already tried clipping scrims out of ordinary household plastics, you are going to run into a very serious problem: a cross-thatch design projected from your light, this being a very undesirable thing, and the possibility of smoke or fire. But this diffusion material is so much better than trying to make your own. The light that passes through, is not thatched, checkered, or criss-crossed, but far more evenly diffuse.
Now, if you fold it in half, you *will* produce a crease, a lot like the crease you get when you fold waxed paper in half, and that will subtract from the evenness of the diffusion.
In any case, I am pretty happy with what arrived.
While I haven't tried it out with any of my really big PARs yet, like my PAR64s, I have put it on a few PAR38 lights, and it works just fine. More light gets through, so the diffusion material doesn't get as hot. And in any case, when you cut them to size, leave a small gap on each side to let the air escape from your PAR can. Some PAR cans have hinged barn doors, depending on the manufacturer, but using ordinary clothespins work a lot better than slipping them into the place where you put your gels.
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