A LOT of good photo paper. RC paper is great for people who don't want to spend a lot of time and money on getting great prints. The glossy variety produces fantastic, rich blacks that can't quite be achieved on the pearl. The 100 pack is great because trust me, it's really not that hard to use 100 sheets of photo paper over the course of ten hours in the darkroom. Also, Ilford's RC paper is probably the most resilient photo paper I've ever used. I left it in the developer for three minutes and the print still came out perfect. I left it in the water bath for quite a few hours and it still didn't deteriorate in any way. You can pretty much do everything wrong with this paper and it will still do right by you. I really, really, REALLY like this paper and would absolutely choose it over the other types.