I just wanted to bump this tutorial. Having tried it out earlier this week, I can give it five stars. What I really like about it is that because the creation process is non-destructive, after you have created your parchment document, you can go back to it again and again and make adjustments to most aspects without having to draw the parchment again from scratch. For example you can change the texture / colour/ clouding / scratches / blotches / ragged edges etc. In short once you've done this tutorial, you may never need draw another parchment again.

Ravs