Vela Sciences E7-A Expanded Hardcover Lab Notebook, 9.25 x 11.75 in (23.5 x 30 cm), 144 Pages, Permanent Bound, 70lb Heavyweight Paper (2-Pack, Ruled)

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SMART CONSTRUCTION - Professional synthetic leather cover with ribbon marker, permanent sewn bound hardcover with heavyweight durable book board, and reinforced flat-back spine. LAB-READY LAYOUT - Features expanded user information page, laboratory notebook guidelines, pre-numbered index, numbered user pages, reference and conversion charts, abbreviation and equipment tables, and user cover label. *With Line Grid+ (5mm) user pages featuring signature and date blocks on every page. 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.