SMART CONSTRUCTION - Scuff-resistant matte laminated cover, extra heavyweight rear backboard for solid writing surface anywhere, double loop reinforced wire for lifelong durability. LAB-READY LAYOUT - Features user information page, pre-numbered index, numbered user pages, and user cover label. *With standard college Ruled user pages. HEAVYWEIGHT PAPER - 105gsm (70lb/28lb Bond) smooth writing paper, designed to minimize ink showthrough or bleedthrough. We recommend archival-quality type inks for day-to-day use in the lab, especially Copic or Micron felt point pens. (Fountain pen use is highly dependent on ink and tip used, please test before bulk purchase.) ARCHIVAL QUALITY - All materials are acid-free, archival quality, and are lab-ready for all ISO laboratory and field research notebook standards. For long-term storage, we recommend storing in dry, room temperature conditions, out of direct sunlight. SUSTAINABLE - FSC, SFI, ECF certified papers & board. Soy inks throughout, minimization of paper waste, and fully recyclable. Printed, bound, & shipped proudly in the USA by the Vela Sciences team.