RE: Lith film

Judy, Ryuji,

X-rays was what was left after all other possibilities we could think of
had been eliminated, though the markings weren't like other definitely
X-ray damaged film I've seen. Been a while now, but as I recall the APH
markings consisted of four or five faint, dark wavy soft-edged lines,
about 1mm thick and 2 or 3 mm apart, parallel and forming an arc shape,
occurring towards one edge of the film. Reminded me of the pattern on
the outside of an oyster shell - more or less concentric circly shapes -
but not the whole circle. Or am I thinking of some other denizen of the
deep? Ate one once - won't do it again.

We saw that the film behaved OK with conventional processing, which
might be explained by the fact that reversal processing removes the top
of the emulsion layer so that the final image is contained in the
depths, rather than, as usual, near the surface. So the fault, whatever
it was, probably lay deep down in the emulsion layer. Possibly a
coating fault, but the pattern seemed to be the same on every sheet. If
they coat huge sheets or rolls and then cut them up (rather than
individual 20X16 sheets) I wouldn't expect to see the same thing in the
same place on every sheet.

Liam
Received on Fri Dec 12 20:56:21 2003