Accidental Mail Art

I often use used mail envelopes or the back of old term papers to draw on, especially for scans. For some reason odd reason, the scanner kept jamming, giving me these interesting patterns. Lovely accident! I quite like these. The second one is a successful scan, but it's the pattern inside the confidential mail envelopes. I ADORE those. Seriously. I've covered notepads and sketch books with those.