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Twin-spool calculator ribbon cartridge in black and red ink

Monroe Systems for Business

Monroe Systems for Business Twin-Spool Calculator Ribbon Black/Red

SKU CH-GWSF-NAS1A

Universal twin-spool ribbon with black/red ink fits Canon, Casio, Sharp, Victor, Monroe and Adler printing calculators

  • Trusted by Fortune 500 firms since 1912
  • True red ink exclusive to Monroe brand
  • Highest inking degree prevents smudged prints
  • Universal twin-spool fits 12+ calculator brands
  • Change ribbon after 3 paper rolls for darkest output

Universal Twin-Spool Design

This Monroe twin-spool ribbon fits all printing calculators that accept ribbon spools. It delivers a true red ink developed exclusively by Monroe alongside black ink for clear, two-colour output. The ribbon is engineered to eliminate smudging and provide the highest inking degree on the market.

Paper-Tape Change Interval

Users are advised to replace the ribbon after every three paper tape rolls to maintain the darkest print quality. This interval ensures consistent ink density and prevents faded output during high-volume use. The ribbon supports continuous operation across compatible desktop printing calculators.

Brand Compatibility List

The ribbon is confirmed compatible with Canon, Casio, Innovera, Monroe, Sharp and Victor models. Supported Adler models include 1012PD-II, 121PD, 1428PD, 1121PD, 1121PDII, 120P, 121P, 121PD, 12P and 12PD. It will not work with calculators that use cartridge-style ribbons or thermal printing mechanisms.

How it compares

Measured against everything we stock in Shelf Stereos & Wall Shelves, at today’s prices. Recalculated every night.

Price $15.99
Cheaper than about 88% of the 71 comparable items (median $33.99).

Specifications

No published specifications for this item yet.

Questions about this item

Which Monroe twin-spool ribbon version fits my calculator model?

This universal black/red ribbon works with all printing calculators that accept twin spools, including Canon, Casio, Innovera, Monroe, Sharp, Victor and Adler models such as the 1012PD-II, 121PD, 1428PD, 1121PD, 1121PDII, 120P, 121P, 12P and 12PD.

What does the highest inking degree mean for daily print quality?

Monroe engineers developed the ribbon with the highest inking degree on the market to keep paper-tape characters dark and legible while eliminating ink smudges during continuous calculation runs.

How does the true red ink differ from the orange tint on other brands?

Monroe uses an exclusive true red formulation that stays rich in colour, unlike the watered-down orange tint found on competing ribbons, so negative entries remain clearly distinct on the tape.

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