Some of you know I used to manage a portrait artist. I devised an archival filing system for materials associated with each painting that was very workable from a marketing standpoint. Since I found that the way I needed to find materials was usually oriented to type of subject, I took that as my cue.
Each painting's materials (negs, slides, transparencies, ad samples) were assigned a category and and a hanging folder created (I color coded each category). I used the following codes:
LB - Little boy
LG - Little girl
W - Woman
M - Man
OM - Older man
OW - Older woman
FAM - Family group
Then I numbered them in time sequence and simply labeled them LB1, LB2, LG1, etc. with number 1 being the earliest painting. Of course, you could set up whatever categories suited your needs the best.
Inside each hanging folder, I keep the materials organized with plastic holders from
20th Century Direct. I found them to have the greatest selection of plastic holders. I haven't checked their web site and it's possible there are more items listed in their mail order catalog.
I then kept a 3-ring binder with a single photo example for each portrait. This photo was a master example for color correction when new photos had to be developed. This gave me a quick way to scan over all the portraits in a particular category and decide what I wanted to send to a particular prospect or use for an advertisement.
By the way, I learned the color codes printed on the back of photos by one-hour photo places so I could better communicate with the developer. I learned to say "two more steps of cyan" because leaving it up to them was very dicey.
Of course, that was quite a few years ago and now I would keep this index to the hanging files on the computer.
I recommend to artists that they have at least the following archival materials for a painting:
35mm negs
35mm slides
4x5 transparency
If you plan to do a poster size print from a painting, then you would also want an 8x10 transparency.
Of course, if you really don't like a painting you've done, no sense wasting the time and film on it.
This type of system could be set up for other types of paintings as well. For example, the artist I managed also did landscapes in oil and watercolor, so I had an LO (landscape - oil) and LW (landscape - watercolor) category too.
I also kept a PR book and archive, but that's for another day.