Spine roll, stack stress, ticks, and splits

Stress vs a tick

Spine stress is a compressed line from reading or stacking. If the ink is intact, it is non-color-breaking stress. If white paper shows, it is a color-breaking tick and is graded more harshly. A cluster of small stresses adds up. One faint non-breaking line on an otherwise sharp book is not the same as a row of ticks down the staple edge.

Photograph the spine in three staple-aligned close-ups so ticks and color breaks are actually readable. Head through the first staple, first staple to last staple, last staple through the foot. Overlap at each staple is expected — the same tear is one defect, not two. A beauty shot of the cover with the spine in shadow is how high grades get invented. Stack stress often lives at the staple line where boxes press. Look there on purpose. If the book lived in a longbox, expect a faint longitudinal line even when the cover still looks sharp — that line is a defect, not “just storage.”

Roll and splits

Spine roll is a curve away from a flat, square spine. The book no longer sits like a brick. Light roll can be pressable; see the separate press guide before you spend money. A split is a separation along the spine fold — a structural break, not a cosmetic line. Split allowances grow as the grade falls: tiny at the top; about a quarter inch around fine; a half inch around very good/fine; about an inch around very good; longer in good and below.

A tear that causes detachment is more serious than a crease of the same length. A detached cover is often no higher than about 4.0, depending on what else is wrong. Staple rust, rust migration onto the paper, and replaced staples are their own problems; a pretty spine with rusty staples is not a top-end book.

What the spine shots are for

The three close-ups are how tick color, staple tears, and split length are measured without shrinking the whole spine into a few pixels. The optional full-height shot on edge is how roll and total split length as a fraction of the book are judged. If you only send a three-quarter beauty angle, the estimate has to assume the more serious plausible spine. That is conservative grading, not a slight. For whether a press is even in the conversation, use Should I press this book? — press talk does not belong as a footnote on every spine defect.