Roscolux Diffusion: a handful of materials that change the character of light ... magicallyl Lighting Wizards everyvvhere now have a whole new set of tricks with Rosco's Diffusion Materials.. These remarkable materials change the character of light. They convert a Leko beam shape into one that is characteristic of a Fresnel. They alter the shape. the shadows. even the feel of the light on your stage. The price is right. too. A single sheet of any of Rosco's diffusion materials is only $3.75. and you can bUy a whole Diffusion Test Kitforjust $14.95. The kit contains the full range of diffusion materials in usable la' x 12" sheets. It allows you to testand use-the newest idea in theatre lighting magic. The photos provide only the first clue to the wizardry you can perform with your own stage lighting instruments. Try the Diffusion Test Kit, or a range of Rosco Diffusers today. You'II find both at your Rosco dealer. nr write Rosco directly. This photo shows the effect of a 6" Leko (ellipsoidal reflector spotlight I without diffusion. Same lighting Instrument, but with #103 Tough Frost In the color frame. Note the soft edges of the beam and the effect on the shadow. 16 8ush Avtnut. Port Chtsttr. Ntw York 10573 114/937·1300 135 North Highland Avtnut. los Angtlts. CA 90038 ,13/462·2233 ,9/71 Upptr GrOund. london SE 19 PO England 11·633·9220 #104 Tough Silk was used here. It alters the shape of the beam to produce a dramatic slash of light. This shape can be oriented and controlled to light a stairway or to eliminate the "scalloped" effect on a eye.