by Part-Timer » Jul 8th, '12, 12:32
As already mentioned, if it is a colour photograph, this is different from a black and white photo and, I would say, the really old sepia pictures are different again.
I think it's a two stage process. First, the base photograph should be as close to the way a picture of the correct age would have been. Again as mentioned above, the paper you print on and the finish applied may make a difference. You might find you get closer to the correct look by, say, printing in matt then using a spray varnish, than printing on modern glossy photo paper. Spray and Shine is a glossy varnish in aerosol format, developed for crafting greeting cards and scrapbooks. You can get a partial shine or a very deep gloss look with it.
Once you have the photo, you need to age it. Mandrake's given some useful tips, but the main one is to think about what happened to the picture. Was it put in a frame on a wall, was it put in someone's wallet, was it left in a drawer? My father has a picture of my mother taken in the 50s and, because it's been in his wallet, there is little discolouration, but the edges are very tatty indeed.
On the subject of materials and tools, there are distressing inks, as Dale said. Look for the Tim Holtz Distress Inks made by Ranger. These can be applied using foam (you could use a make-up sponge or something called "Cut and Dry" foam), working on an ink repellant surface. You work from the surface, onto the photo, to avoid harsh lines, but be careful to keep the surface clean as you work round, or else you can get ink on the back in ways you don't want (for crafters this is usually unimportant as they are trying to make something look vintage, but not so as to pass examination). You can apply ink directly from the pad to edges to give extra "dirt". Tim Holtz has a couple of DVDs out and on one of them he shows how to age a photo, including adding a little tinting by hand (quite popular before colour photograph came along).
Other things you can do include using a scratching tool (it's a retractable wire brush), a paper distresser (actually a thread cutter, but someone worked out it works on paper edges really well) and a sander. Craft Tonic makes the first two items and Tim Holtz has a sanding grip designed for crafting. Very fine wire wool is another usfeul sanding tool.
You can also get stamps that are designed to add ditressing effects, such as splats, scratches and crackle. You can get inks that remove colour (there's one called Castaway and some crafters use bleach to discolour items), but obviously be prepared to have many goes before getting it right.