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Two-thirds Key Number
Like the one-third key number,
but +80 perforations following
the main key number.
Frame-Reference Markers
A Dash, Key and Plus are printed at
regular intervals to help locate frame
lines, especially for scenes shot in
low light.
– Dash: Frame reference mark for
5- and 10-perf formats.
Key: Frame reference mark for
8-perf format.
+ Plus: Frame reference mark for
15-perf format.
(Every third dash is a plus)
To Use:
Locate one frame line and
nearest reference marker for the
given film format. Count the number
of perforations between the frame
line and the marker. Use this perf
offset to identify the location of
frame lines throughout the scene.
Note: Frame-reference markers are
not printed when they interfere with
other edgeprint information.
Tails