Blue screen
n.phr.
Subject Field: Cinematography

A deep blue screen behind the foreground action used in the blue screen process. Ideally this screen is lighted with blue light, such as white carbon arcs plus T.D. 25 filters. The foreground is lighted in the normal manner. It is necessary to avoid any blue colors in the foreground. It is also necessary to avoid semitransparent objects. Abbott			- Contained in - Blue screen process Bibliography Index Home Conceptual tree
Context: A cover matte density of 0.6 to 0.9 is generally sufficient when using an excellent blue screen such as the rearilluminated Stewart T-matte blue. The problem with the blue separation is that it is essentially clear in the blue backing area and requires a very dense cover matte which rarely fits. The green separation is an almost ideal replacement for the blue separation because of its high density (blackness) in the blue-screen area and because it has the correct density for all of the foreground colors except for yellow and green. Ryan Attestation: 3 Schermo blu Reliability: 3