For its PERPANEP line (an anagram of "pen" and "paper"), Kokuyo has optimized the compatibility between different paper textures and pen types to offer 3 different pairings:
- Smooth (Sara Sara) [75 gsm] - Designed for use with water-based gel pens, like the Kokuyo x Zebra SARASA Clip PERPANEP - 0.5mm. Also works with oil-based ballpoint pens and pencils.
- Textured (Zara Zara) [90 gsm] - Designed for use with fountain pens, like the Kokuyo x Platinum Preppy PERPANEP - 0.3mm. Also works with plastic-tipped fineliners.
- Ultra-Smooth (Tsuru Tsuru) [96 gsm] - Designed for use with plastic-tipped fineliners, like the Kokuyo PERPANEP Finewriter - 0.35mm. Also works with felt-tipped pens and fountain pens.
The Smooth (Sara Sara) paper is meant to be smooth with just a hint of tooth. Of the three texture offerings, Smooth is compatible with the widest variety of pens: gel rollerball pens, oil-based ballpoint pens, and mechanical or wooden pencils. Weighing in at 70 grams per square meter (gsm), it is the lightest and thinnest paper of the three textures. Kokuyo recommends pairing it with their collaboration gel pen with Zebra, the Kokuyo x Zebra SARASA Clip PERPANEP - 0.5mm.
This paper texture is available in 5 page styles: 3mm Grid, 4mm Grid, 5mm Grid, 4mm Dot Grid, and 6mm Steno Ruled. The gray cover is made out of eco-friendly recycled pulp, the pages are made out of forest-certified paper, and the cheesecloth binding allows the pages to lay completely flat when the notebook is open on a table. Because the notebook lays flat, the gutter of the notebook is minimally intrusive so that it doesn't interrupt your writing experience, especially if you enjoy writing or drawing spreads.
- 60 pages
- A5 (148 x 210 mm)