Digitize print to reprint question

[Old Crank]

Here is the question.

I have 4 B+W prints on 11X14 paper, picture size 9X12ish. I reasonably sure the negatives were lost/discarded in my recent move.
I decided that I would give the set to the young lady on the flying trapeze if I could find her. Photos summer of 1998. Well I did through an intermediary. Now the problem is that the intermediary gave her 2 pictures that I gave her to the subject as a wedding present and would, if possible like a copy of the show that she produced.

Original images shot with 35 mm Kodak infrared. (info for peopel who like to know data. Nikon FM2, 70-150 f4 Nikkor lens with a flash modified to give light only near infrared zone.) So they are grainy. It is what I wanted. I used to joke about the grain being so large that I could use my rejects as emeryboards...

So what would be a good dpi to scan the prints at so that I could have prints made that will show the grain largely as it is inteh original prints. I have options from one provider of , 1,200, 2,400 and 3,600 dpi. The difference in cost cor the scan isn't very much.

Thanks for any insights.

Pictures of two of the prints; On the prints the back ground is solid black not mottled

[usonian]

1. I've actually got an infrared print in my collection here and can dig it out in a day or two.

Epson 2450 scanner still running.
It may not be grainy, but I am sure I made up for the lack of grain with my amateur printing at the time.

Will update if and when I find it.
Then again, if you are near Central California, just drop by and use the scanner here.

Have fun.

[alfredo]

2. I would like to know why. I see nothing in the image or text to draw that response.

[Old Crank]

3. Thank for the offer

But I am not in the neighborhood. I know I can get it scanned to 3,600 dpi. One question would be how many dpi to expect from a printer.
One issue I have is a bit of a language barrier.

[Major Nikon]

4. You don't need a 3600 dpi scanner to scan a print

There's only about 300 dpi worth of information in a typical print, so you very quickly reach the point of diminishing returns when it comes to scan dpi.

Professional scanning services are reported to be the best option although I have no personal experience to verify this. It's a safe bet their scanners will be superior in quality to a home scanner, but not because of greater dpi. Things like digitizer quality, better quality glass or glassless methods of scanning, superior post processing techniques, etc., can make a much greater difference to the end result.