LA Times | Denim Shoot

There is a nice denim mini-primer: 'Denim, as it’s usually understood, is a durable, cotton twill fabric with an indigo-dyed warp or top yarn and a white weft or bottom yarn (which is why, if you turn up the cuff on a pair of jeans, the inside has a noticeably lighter cast). The relatively coarse traditional 3×1 weave (which means the thread crosses over three perpendicular strands before going under one) gives denim its durability and familiar ribbed texture'

More on the Denim story from LA Times (via Indigo Fan)