Backprint or stamp for copyright

[Tigershark]

Does anyone print themselves and if so what do you use to copyright the print on the back? Is there a stamp/sticker that anyone would recommend? I just bought a Shinko and will be doing all my printing for my schools and sports leagues this year and the only disadvantage is that I can't backprint so i am looking for a way to put something a stamp/sticker on the back and looking for suggestions

Thanks

[aroundlsu]

I would imagine a stamp would be much faster. I wouldn't want to have the job of peeling stickers for thousands of school photos.

[Tigershark]

I was thinking the same thing, just not sure what kind of stamp will work without affecting the print in any way

[Box Brownie]

Do a Google for "Staz-On" inks. Though I have yet to use it myself this ink by all accounts is the biz for marking such surfaces. Solvent based, quick drying unlike marker pens etc that smear on print backs :(

[golfecho]

Avoid a peel/stick label because it is a different product than the print, and if the print is exposed to a significant change in temperature, the print and label could expand/contract at different rates causing an "imprint" or distortion in the viewable side of the print.