Sedulus 主課本 特大 A4 橫式 紅色

The paper is wonderfully thick at 110 g/m², so my fountain pen ink doesn't bleed through at all. I love the extra 20% space this landscape size provides for detailed botanical sketches without feeling cramped.

The oversized landscape format gives me so much more space for writing and drawing compared to a standard A4 book. The 110gsm pages hold up well to fountain pen ink without bleeding through.

I was pleasantly surprised by how sturdy the 270gsm cover feels—it holds up well in my bag without bending. The 110 g/m² pages take fountain pen ink beautifully with no bleed-through. This is my new go-to for sketching and note-taking.