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>>Everything points toward the neg assembly or the printer but I can't seem to
get a firm answer as to what causes this problem. (printing process,
splicer, neg cutter...)<<

Could be any or all of the above. If the negative splices are a little
out of pitch (i.e. the film pieces, at the join, are too far apart or
too close, or crooked, then there will be a period of two frames as the
printing machine tries to cope with this irregularity. Both continuous
printers and step printers could have difficulties, though the effect is
marginally different.

However, even if the splices are within tolerance, some printers can
produce this problem if the film transport tension settings are wrong
(continuous printers) or if a step printer gate is out of alignment.

Solution: go back to the lab and have them investigate. There may be a
printer adjustment possible. If it's the splices in the original neg
(easily checked by laying a piece of uncut negative across a splice and
seeing if the perfs line up on both sides), there aren't many options
other than digital manipulation. 

With due respect to wanting the best possible result, and maintaining
standards etc, if this is not possible to see at normal speeds, is there
a real problem?  I ask only because the implications of having to fiddle
with negative splices do not bear thinking about.

  Dominic Case
  Atlab Australia

Thanks to Tim Ready of VAS Group for supporting the TIG in 1998..
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