Three Case Styles for Three Bookbindings with Priscilla Spitler – Day 1
My first session at PBI was marked by not one, but two classes. The other class I took during this time was Priscilla Spitler‘s Three Case Styles for Three Bookbinding. The three bindings we worked included quarter cloth flatback, half cloth rounded, and full cloth flatback bindings.
I have to admit that the reason I chose this class is because I suffer from F.O.C.I. – Fear of Casing In.
We started off by sewing our three text blocks using #25/3 unwaxed linen thread. Priscilla said that she prefers English #18 sewing needles. The blank text blocks were made of 80 lb. Cougar text weight paper, natural smooth finish. One text block was the printed text of the 20th anniversary edition of Gary Frost’s Three Bookbindings.
You knock up the signatures to the head. Mark the signatures on the spine with three diagonal lines so you can keep track of the head. Our text blocks were sewn with an unsupported (no cords or tapes) link stitch. Keep the signatures flat on the table while sewing – Priscilla remarked that there should be no “air sewing”.
Be sure to pull your thread in the direction of your sewing – you don’t want to tear through your signatures by pulling in the wrong direction. Rub your bone folder along each signature after sewing. If you run out of thread, keep your weaver’s knot on the outside of the signatures so it doesn’t show on the inside of the book.
Endpapers were created with paper that was the same height as the text block and twice the width – we folded these in half. We tipped in our endpapers with a 3/32″ line of PVA along the folded edge. Priscilla uses cold flex glue #22 from Ernest Schaeffer. She added that she prefers Hahnemuhle Bugra paper for casing in.
After our text blocks were sewn, we glued up our flatbacks with PVA – this is known as consolidation. You work the PVA into the spine so it fills all of the open spaces. Once the PVA was dry, we added a layer of cambric cloth to the spine with an overlap of 5/8″ over the edges. Rub on the cambric with a bone folder to help with adhesion.
Although it may not sound like much (trust me, it was), that was it for today!