2 adjectives to describe substrate

Time was, a "book" was something produced by many months' labor by a scribe, usually a monk, on some kind of durable and sexy substrate like foetal lambskin.

Gutenberg's xerox machine changed all that, changed a book into something that could be simply run off a press in a few minutes' time, on substrate more suitable to ass-wiping than exaltation in a place of honor in the cathedral.

2 adjectives to describe  substrate