You might want to cut off a few feet of it, expose some, and process it (in
what? B&W chemistry, perhaps) to get an idea what it might be. Perhaps you
do not want to use it anyway.

It's probably microfiche. Throw it away and move on.

Just use it as a contact material.  Make dupes of anything by laying
down the originals and printing by contact onto the other stuff.

Now, what you will use these for, I can not, in good conscience,
suggest any further.

Getting it perforated will solve your problems.  The only place I can
suggest, from personal knowledge, is through the 3M facility in
Weaterford Oklahoma that slits, perforates and spools their Ferrania
color film after it arrives from Italy.

Could Konica do likewise?  Call around.

Robert Vervoordt, MFA

Dumbass......

Hmmm. You do have a problem. And I'm afraid I can help you. I guess all
of us have come across a similar situation before. I acquired a large
reel of 16mm stock that I thought would be useful for my little Minolta
16. However the cassettes were the problem here - a couple of years
later I did aquire 20 16mm films which had expired 10 years before.
These cassettes proved very useful. The I had the idea of slicing the
middle 16mm out of standard 35mm film - suddenly my 'no film available'
16mm camera could take Ektachrome, Tri-X and PanF - and I was getting 3
rolls of 24 for every roll of 35mm.

Perforating with a hole punch seems feasible. Maybe cut a length and try
it. What kind of film is it? Just C41 colour or something a bit more
exotic?

There used to be movie houses that would slit and perforate 16mm out of 35mm
stock, or convert 16mm to Double 8mm and maybe some of these houses would
also have the capability to perforate 35mm stock, cost might be prohibitive
for a few hundred feet.

A really good camera repair guy could convert a mechanical SLR to use
unperforated film (just hope you can find someone to print it.

If you process and print your own, use the film in homemade panoramic
pinhole cameras.

Long roll backs for medium format would work also.

This is 35mm unperf film used in special magazines and cameras typically
used by shool photographers who shoot the grade shool kind of pictures, or
some of the portrait studios in places like Sears or Pennys.

It is likely a Konica "Professional" film emulsion, similar to the Portra
film Kodak makes, intended for lower contrast and color saturation. I doubt
you will find a manufacturer (as is mentioned in some of the other
responses) who would be willing to take this back to their finishing
facility and perf it for you. I also would not bother wasting the time or
money to adapt a 35mm SLR to take it.

You can try a hole punch, but I doubt you would be able to line it up in the
dark to perf both sides and space the perfs exactly.

SOL seems like a good description to me, sorry.