Good tutor. Heres a few points you might want to try/add.
1. Instead of using tape to secure the two transparencies together, you can put a few drops of water between the two sheets, this insures that the sheets are perfectly mated and it is easier to align the two sheets. I used to use tape but had problems with shadows/blurred lines. I don't know how ink jet ink reacts to water though, I use a laserjet.
2. Make sure there are no burrs on the edge of the cut printed circuit board, file or sand the edges. If there are edges, the transparencies won't mate to the PCB surface properly and may result in shadowed/blurred lines around the edges.
3. UV lamps are not needed, I use a standard florescent lamp with an exposure time of 12 minutes.
4. Sanding to remove the resist is not necessary. A 0000 grade steel wool can be used (careful, some brands have oil in them!) or use a solvent or place the board back in the resist developer. If you wish, the resist does not need to be removed at all, it acts as a flux and can be soldered to directly.
Thanks for the tutor, I was thinking of writing one myself but I never could find the time!