Which Paper Is Best for Watercolour Painting? Cotton Paper Explained

You buy a beautiful set of watercolours, paint your first wash, and the paper buckles, pills or turns muddy. Nine times out of ten the problem is not your brush or your skill. It is the paper. So which paper is best for watercolour painting? The short answer: paper made from cotton, with enough weight (GSM) for the amount of water you use.

This guide explains what makes paper good for watercolour, how cotton paper compares with regular paper, and how to pick the right book for your style, from light watercolour sketches to ink and charcoal. If you already know what you need, you can browse our handmade deckle edge art books.

What makes paper good for watercolour?

Three things decide how paper behaves with water:

• Fibre: what the paper is made from. Cotton fibres are long and strong, so they absorb water evenly. Wood-pulp paper has shorter fibres and tends to break down when wet.
• Weight (GSM): grams per square metre. Heavier paper holds more water before it warps.
• Texture: smooth (hot pressed), medium (cold pressed) or rough. Texture changes how pigment settles and how much detail you can paint.

Cotton paper vs regular paper

Regular notebook and printer paper is made from wood pulp and treated for pens, not water. Paint sits on top, the surface roughens, and the sheet curls.

Cotton paper for watercolour behaves differently. Cotton fibres soak up water slowly and evenly, so colours blend smoothly and dry with soft edges. The surface is also tougher, so you can lift paint or layer a second colour without tearing the page.

Handmade cotton paper adds one more quality: character. Each sheet has a slightly uneven texture and natural deckle edges, which makes sketches and journal pages look warm and artistic.

Is all cotton paper the same?

No. Professional watercolour sheets are often 100% cotton at around 300 GSM, made for heavy, very wet washes. Handmade cotton papers vary more in weight and texture. They are excellent for sketching, ink and lighter washes, and they bring a look that machine-made paper cannot copy.

Hot pressed, cold pressed or rough?

Paper texture is the next thing to understand when you ask which paper is best for watercolour painting:

• Hot pressed: smooth surface. Great for fine detail, botanical illustration and ink, but washes can look streaky.
• Cold pressed: slight texture. The most popular choice because it balances detail with smooth washes.
• Rough: strong texture. Pigment settles into the grain, giving a loose, expressive look for landscapes.

Handmade paper does not always follow these exact categories. Its texture comes from the papermaking process, so each sheet has its own natural surface, often somewhere between cold pressed and rough. That organic texture is a big part of its charm.

What GSM do you need?

• Under 120 GSM: writing and dry pencil sketches. Not suitable for wet paint.
• 150–200 GSM: sketching, ink, charcoal, markers and light watercolour washes. Ideal for art journals and travel sketchbooks.
• 300 GSM and above: heavy, multi-layer watercolour paintings where you flood the page with water.

Most hobby painters and journalers spend their time in the middle band. If you sketch first and add a light wash of colour, 150–200 GSM cotton paper gives you a pleasant, flexible surface without the cost of thick professional sheets.

Which paper is best for drawing and mixed media?

If you also ask which paper is best for drawing, the same rules help. Pencil and charcoal like a little tooth (texture) to grip graphite. Ink likes a firm surface that does not feather. Mixed media, where you combine ink, pencil, collage and colour, needs paper that can handle a bit of moisture and glue.

Medium-weight handmade cotton paper covers all of these, which is why so many artists use one book for everything: sketching on the train, ink line work, a quick watercolour of a market scene and a pasted ticket on the next page.

Papernest deckle edge art books: what they are made for

Our deckle edge art books are made with handmade cotton paper using traditional papermaking methods, from upcycled cotton fibres. Taking the B5 Checkmate deckle edge art book as an example:

• Paper: handmade cotton paper, 80 sheets (160 sides)
• Size: 6 x 9 inches
• Binding: open spine, so the book lies completely flat while you paint across pages
• Edges: natural deckle edges, so no two books are exactly alike
• Best for: ink, charcoal, pencil, calligraphy, mixed media and light watercolour

In simple terms: these books are perfect for sketchbooks, art journals and travel journals with light washes of colour. For very wet, layered watercolour paintings, use a dedicated 300 GSM watercolour block alongside your art book.

Want to know more about those rough, feathery edges? Read our guide on what deckle edge paper is.

Tips for painting on handmade cotton paper

• Use less water than usual. Build colour in light layers instead of one heavy wash.
• Let each layer dry. Painting on a damp page is the main cause of pilling.
• Test first. Try your paints and pens on the last page; handmade paper absorbs differently from sheet to sheet.
• Sketch lightly. Use a soft pencil and a light hand so you don't dent the surface.
• Embrace the texture. Uneven fibres and deckle edges are part of the beauty, not a flaw.

Common mistakes with watercolour paper

• Using printer or notebook paper: it warps and pills almost immediately.
• Flooding thin paper: lighter papers need light washes; save heavy, wet techniques for thick sheets.
• Scrubbing the surface: rubbing a damp page damages the fibres. Lift paint gently with a clean, damp brush instead.
• Skipping a test: every paper behaves differently, so always try a swatch first.

Choosing the right book for you

• Daily sketching and ink: a medium-size deckle edge art book. Browse all art books.
• Art journaling and collage: a handmade cotton paper sketchbook from our journals and art books range.
• Memory keeping with a vintage look: our vintage journals, with antique-tone handmade paper.

Caring for your art book

Store your art book flat and away from damp, and let painted pages dry fully before closing the book. If a page curls slightly after a wash, place the closed book under a few heavy books overnight to flatten it. A sheet of baking paper between freshly painted pages stops colour from transferring.

Frequently asked questions

Which paper is best for watercolour painting?

Cotton paper is best, because cotton fibres absorb water evenly and resist pilling. Choose around 300 GSM for heavy washes and 150–200 GSM for sketching with light watercolour.

Can I use cotton paper for painting with watercolour in a sketchbook?

Yes. Medium-weight cotton paper works well for light washes, ink and pencil. Use less water and let layers dry between coats.

What does GSM mean on paper?

GSM means grams per square metre. It measures paper weight: the higher the number, the thicker and more water-resistant the paper.

Is handmade paper good for drawing?

Yes. Handmade cotton paper has a natural texture that grips pencil and charcoal, and a firm surface that suits ink and calligraphy.

Find your paper

The best paper is the one that matches how you paint. If you love sketching, ink and light colour with a handmade feel, explore our deckle edge art books, made from upcycled cotton fibres and finished by hand.