Trial prints
and check prints should be screened free of interruptions,
on good equipment in a properly darkened room. You
cannot make consistent judgments if significant
variations occur in the screening system and the
environment. Potential variations in the projection
system are: the screen type and size, distance from
the projector to the screen, the projection light
and lens, viewing angle and ambient light.
There are established standards
of screen brightness for viewing prints intended
for direct projection. The brightness at the center
of the screen should be 16 feet lamberts (plus
or minus 2) when the projector is running with
no film in the gate. (Ref: ISO 1920:1990)
16mm prints are made for projection
with several colors or projector illumination.
The color quality of the projection light in the
review room should be adjusted as closely as possible
to that of the final print use.
The following sources are in
commercial use for projection of 16mm prints:
Approximate
Color Temperature
Incandescent Bulb
3450K
Modified Carbon Arc
4450K
High Intensity Carbon Arc
5400K
Zenon Arc Bulb
5400K
16mm prints made for television
projection are normally balanced for 5400K screening.
After screening the first trial
print or check print, if there are changes which
need to be made in density or color balance, the
print must be returned to the lab along with instructions
for those changes. Footage counts from the printer
start mark should be used to indicate the locations
of scenes to be changed. If any changes in the
production itself have been made, such as scenes
replace or changed in length, this should be noted.
Extensive changes may require a second trial print.
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