ForMatter/Finishes/coating/Calendered paper (smooth / supercalendered)
finish_coating_calendered_paper

Calendered paper (smooth / supercalendered)

coating · polished · calendered, supercalendered, SC paper, machine-finished paper

Paper run between heavy steel rollers — the surface densifies, fibers compact, the sheet gains smoothness and gloss. Reads in three grades: machine-finished (slight smoothing), supercalendered (high gloss, magazine-page register), gloss-coated calendered (mirror gloss, art-book register). The technology behind every glossy magazine, supermarket flyer, photographic-paper print.

Paper passed through a calender stack — alternating polished steel rollers and softer composition (cotton-paper) rollers, 6–12 nips, pressure 1000–4000 psi, mild heat 50–80 °C. Fibers compact, surface micro-roughness drops, gloss rises. Three grades by industry convention: MF (machine-finished, ~30 GU at 75°), SC (supercalendered, ~50 GU, the Time / Newsweek register), and SC+ (~75 GU, art-book and photo-paper register). Often combined with a mineral-pigment surface coating (kaolin / calcium-carbonate) that gets calendered together — that's how high-gloss magazine paper achieves >85 GU. Distinct from the related vellum / matte / uncoated grades that skip or reduce the calendering step.

character — smooth glossy paper surface, magazine / art-book register.

Finish properties

  • levelpolished
  • subcategorypaper roller compaction
  • applies topaper

Second life

reversibilitymoderate — most coatings can be stripped chemically (methylene chloride for paint, NaOH for some powder coats) or thermally / mechanically (sandblasting). Some specialty coatings (DLC, ceramic) require commercial-service strip.
blocks substrate recyclingno
renewabilityfield- to shop-renewable — most paint and clear coats can be touched up or re-coated in service; powder coat and PVD coatings require a coating-house re-application.

SSPC / NACE surface-coating standards; manufacturer technical literature for the specific coating chemistry.

Citations