I've been calling my tutorials "bookbinding 101" so I really should have done this particular tutorial first. I spend a substantial amount of time worrying about paper grain direction when I'm making my books. So, as far as I know, all machine-made papers have a grain direction. This applies to standard printer paper, cardstock, drawing paper, watercolour paper, etc, as well as binder's board or other boards. Basically every paper material that we use for making books – except handmade…
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Charlie Owen