Trade name for a fast,self-fixing,light-sensitive proofing paper manufactured by DuPont.Proofs can be made from either positive or negative film and are processed in as little as 30 seconds.The paper is sensitive on both sides,permitting the creation of accurate dummies.

Layout pattern which balances elements in an unsymmetrical form.Also called Asymmetrical balance,Informal balance.

Computer memory that will degrade in time if a power source is not permanently or frequently applied.For example:CRT storage.

Light source for repro-photography and printing down.It is a kind of metal halide lamp.A supply of electricity will cause the dysprosium iodide to vapourize to glow.Its efficiency is high and the spectro distribution is good.But it takes time to warm up and if turned off,it requires and interval of at least 3 or 4 minutes before it can be started again.Also,its working life is short.Therefore,it is not very popular.