how many sheets in this notebook?

80 sheets. It's thick, coated paper (great for fountain pens), so you should be able to write on both the front and back sides of each sheet with no bleed-through.

What is the height of the rules? Is it 7mm or 8mm?

I measure rules at precisely 7mm.

Wondering how is everyone using it

I used other notebooks for notes at work. I bought this specific one for tracking Rummy scores between my wife and I.

How fountain pen friendly is it when compared to a moleskine notebook?

Very fountainpen friendly! I primarily use a lot of steel flex pens that not only deposit a lot of ink but also carves pretty heavily into the page. This paper works very well in minimal to no bleeding and ghosting. Absorbs ink well and showcases a decent amount of sheen/shading

Mnemosyne Dot Grid Notebook- B5, 9.92" x 7.56", 80 Sheets / 160 Pages, 5mm Dotted Journal, Perforated Pages & Wire-Bound to Lay Flat, Black, Made in Japan

Product ID: 171064726

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Details

Brand
Maruman
Color
Black
Theme
Book
Sheet Size
9.92 x 6.61
Pages
160
Cover Material
Plastic

📄160 perforated pages

🔄Lay-flat wire binding

🖋️80 g/m² bleed-resistant paper

Description

📝 Elevate your note game with flawless pages and sleek durability!

EFFORTLESS PAGE SHARING - Micro-perforated sheets let you tear out notes cleanly—perfect for meetings or quick handoffs.
WORK ANYWHERE DURABILITY - Resin-coated poly cover repels dirt and water, keeping your notebook pristine on the go.
SUBTLE DOT GRID PRECISION - 5mm light gray dots provide structure without distraction—perfect for notes, sketches, or bullet journaling.
SEAMLESS WRITING EXPERIENCE - Wire binding allows pages to lay flat or fold back, maximizing workspace in cafes or tight desks.
INK FRIENDLY ULTRA SMOOTH PAPER - 80 g/m² acid-free Japanese paper resists bleed-through, ideal for gel pens, markers, and fountain pens.

The Maruman Mnemosyne B5 notebook features 160 micro-perforated pages of premium 80 g/m² acid-free Japanese paper designed to prevent ink bleed-through. Its durable resin-coated poly cover and wire-bound lay-flat design make it ideal for professionals on the move, while the subtle 5mm dot grid offers clean, distraction-free structure for notes, sketches, and planning.

Specifications

Manufacturer	Maruman Corporation
Brand	Maruman
Item Weight	0.634 ounces
Product Dimensions	9.92 x 7.56 x 0.39 inches
Item model number	N104
Color	Black
Cover Material	Plastic
Material Type	Paper
Number of Items	1
Size	9.92" x 7.05" (Dotted)
Ruling	Dotted
Sheet Size	9.92 x 6.61 after detached
Paper Finish	Ultra Smooth
Manufacturer Part Number	N104

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