I've always been in favor of marking my 8"x10" negatives with at least enough information to reunite these with their sleeves (containing full notes) should they become separated. Having recently started to drum scan my LF work, I now find my previous pen of choice -a Staedtler Mars Pro 0.18, by the way- producing writing unable to withstand the effect(s) of the scanning oil and/or the removal of this somewhat scary substance.

(If someone had asked me 10 years ago to please stick my negs in a bucket of oil, I think I would've declined...)

Do any of you wonderful, knowledgeable people on this forum have any suggestions as to what kind of pen would be both archivally safe as well as being permanent enough to be able to deal with this brave, new hybrid world we live in?

If I'm being silly here regarding the archival issue since the negs are getting The Oil Treatment,

please tell me I'm being too concerned for my own good.

Thanks for your time, guys!

Regards,