Content mainly text, formulas, tables, line drawings, with a small amount of color illustrations; extremely high text precision requirements, no typos or misalignment.
Binding priority is flat reading, thick books commonly use sewn perfect binding; both paperback and hardcover available.
Low color demand, mostly black-and-white printing, only some illustrations separately made as color inserts.
Paper requirements: good opacity, reducing show-through; paper surface relatively flat, suitable for fine lines and small text.
Applicable to science and engineering monographs, engineering technical manuals, medical monographs, computer professional books, geology/agriculture and forestry research works, university graduate professional reference books, industry standard compilations.
Format: small 16K (185×260mm) most commonly used; some thick volumes use 16K (210×285mm);
Inner page paper: 80–100g offset paper, black-and-white printing; color inserts separately use 100–128g art paper / pure paper;
Cover (paperback): 250g art paper, matte lamination; (hardcover) 2.0–2.5mm grey board, wrapped with specialty paper / art paper;
Binding: page count >160P prioritize sewn perfect binding; thin books can use perfect binding;
Process: very few complex surface processes; occasionally UV, hot stamping for book titles.
