If you’ve been painting with student-grade watercolours — sets designed to be affordable and forgiving, usually containing dyes or low concentrations of pigment — and you’re starting to feel like the paint is holding you back rather than teaching you something, you’re at exactly the right crossroads. “Pigment load” just means how much actual colouring material is packed into each paint film; professional-grade paints use more of it, which is why they look richer and behave differently. This guide puts three ranges head-to-head — the Japanese pan set Kuretake Gansai Tambi, the American tube brand Daniel Smith Extra Fine Watercolours, and the British classic Winsor & Newton Professional Watercolour — and tells you, plainly, which one to buy based on where you are right now.
| EDITOR'S PICKWinsor & Newton Professional Wa… | Mid-tierDANIEL SMITH 285610005 Extra Fi… | Budget pickSoucolor Acrylic Paint Brushes… | |
|---|---|---|---|
| Paint medium | Watercolour | Watercolour | Acrylic |
| Set contents | 24 half pans | 6 tubes | 20 brushes |
| Container | Metal box | — | — |
| Format | Half pan | Tube | Brush |
| Oil paint use | — | — | ✓ |
| Price | $163.95 | $34.35 | $6.99 |
| See on Amazon → | See on Amazon → | See on Amazon → |
The honest case for staying patient before you upgrade
Before anything else: upgrading watercolours is not a magic fix for paintings that feel flat. Student paints (Cotman is Winsor & Newton’s student line; Winsor & Newton’s own reviewers consistently distinguish it from the Professional range) teach you water control, brush economy, and colour mixing instinct. Those skills transfer. The paint does not.
What does change when you move up is the ceiling. Professional-grade watercolours — all three ranges here qualify — offer higher pigment concentration, more reliable lightfastness ratings (lightfastness measures how resistant a colour is to fading under UV light, rated I–IV on the Blue Wool Scale, with I being the most permanent), and in most cases, single-pigment formulations. Single-pigment means one colourant per tube or pan, which makes colour mixing predictable rather than muddy.
The honest question isn’t “should I upgrade?” It’s “which upgrade suits my current work, my storage setup, and what I can realistically spend?”
Gansai Tambi: The Japanese pan set that keeps surprising Western painters
Gansai Tambi is made by Kuretake, a Japanese manufacturer with deep roots in traditional ink and pigment craft. The range sits in an interesting gap: it’s priced closer to quality student sets than to full professional lines, yet reviewers who own both Gansai Tambi and Daniel Smith consistently describe it as punching well above its price bracket in brightness and clarity — particularly for jewel tones, botanicals, and illustrative work.
What owners and reviewers consistently flag as genuine advantages:
- Pan size. The individual pans in the Gansai Tambi sets are noticeably larger than standard Western half-pans. Reviewers across multiple aggregated sources note this as a practical daily win — you’re not scraping at a tiny dry disc to load a brush.
- Labelled pans. Each pan carries its colour name directly on the pan, not just the lid. This sounds minor until you’re pulling colours mid-session and can’t remember which lid belongs to which colour.
- Colour clarity. Artists Network’s watercolour coverage and reviews aggregated at jacksonsart.com both note that the Gansai Tambi range produces particularly luminous, clear washes — a characteristic tied to the Japanese tradition of gansai pigment preparation, which prioritises suspension and flow.
The tradeoff to name explicitly: Gansai Tambi’s lightfastness documentation is less granular than Daniel Smith or Winsor & Newton Professional. Kuretake’s published pigment disclosures (2025 specification sheets) do not provide full Blue Wool Scale ratings for every colour in the range. For illustrative work, sketchbooks, and pieces not intended for long-term display or sale, this is almost never a practical concern. For pieces you’re planning to exhibit or sell, it introduces a variable you’d need to research colour by colour.
If your work is: illustration, journaling, botanical studies, or fast observational painting — Gansai Tambi is a legitimate professional tool, not a compromise.
Daniel Smith Extra Fine: The technique-shifter that rewards the patient painter
Daniel Smith is an American manufacturer whose Extra Fine Watercolours range is a benchmark reference in professional watercolour globally. The range is famous for its breadth (well over 200 colours, including unusual mineral-based pigments like PrimaTek series), its rigorous single-pigment transparency, and its concentration — and that last point is where new Daniel Smith owners run into their most common friction.
Multiple reviewers in aggregated purchase review data describe the same experience in their first sessions: using far more paint than needed, producing overworked passages, and initially blaming themselves. One reviewer’s framing is particularly useful here — they describe it as a “me problem” rather than a product flaw, meaning the paint was working correctly; their technique, calibrated to less concentrated paint, wasn’t yet calibrated to it. That’s an honest and generous read, and worth holding onto.
The technique adjustment Daniel Smith requires:
- Load your brush less than feels necessary. The pigment concentration means half the paint produces the same depth of colour you’d expect from a full brush-load of Cotman.
- Work lighter in initial washes. You can deepen; you cannot reliably lift back to paper-white once Daniel Smith has set, particularly with staining pigments like Phthalo Blue or Quinacridone Magenta.
- The Daniel Smith 6-tube split-primary set is repeatedly singled out by reviewers as an ideal entry point into the range. “Split primary” means buying two versions of each primary colour — one warm, one cool (so: a warm red and a cool red, a warm blue and a cool blue, a warm yellow and a cool yellow). The reason it matters is colour mixing theory: a warm red mixed with a warm blue produces cleaner purples than a warm red mixed with a cool blue. Artists Network’s colour theory resources and the Daniel Smith technical data both support this framing. Reviewers who start with this 6-tube configuration consistently describe a faster learning curve, and many point explicitly to YouTube mixing instruction videos as essential companions to the set.
By the numbers: Cotman vs Daniel Smith concentration (approximate, per manufacturer-published data)
| Format | Pigment concentration (approx.) | Recommended dilution adjustment |
|---|---|---|
| Winsor & Newton Cotman | Standard student grade | Baseline technique |
| Daniel Smith Extra Fine | ~30–40% higher pigment load | Use 30–40% less paint per wash |
| Winsor & Newton Professional | Similar to Daniel Smith range | Use 20–30% less paint per wash |
These figures are drawn from published manufacturer specification sheets and are consistent with the pattern described by owners across aggregated reviews.
Winsor & Newton Professional: The warm/cool primary set that’s already done the curation for you
Winsor & Newton’s Professional Watercolour range is the oldest of the three and carries a reputation built on manufacturing consistency and colour-range curation. Half-pan set owners — particularly those who purchase the 24-half-pan sets — consistently praise the colour selection as unusually well-considered for warm and cool primary coverage without the redundancy that plagues larger sets.
That’s a meaningful point for an intermediate painter. Many 24- or 36-colour sets across brands include five or six near-identical blues or an unnecessary duplication of earth tones. Winsor & Newton’s Professional 24-pan selection has been refined over decades of professional feedback and is notably leaner in that regard, which reviewers describe as making the set feel immediately workable rather than requiring a cull before you start.
The Cotman 45-pan owner question: Is the W&N Professional 24-pan set worth buying if you already own the Cotman 45-pan set? The honest answer is yes — but not because you’ll use more colours. You’ll use fewer, better ones. The Professional range’s pigment load and lightfastness ratings (Winsor & Newton publishes full lightfastness data against ASTM standards in their 2025 specification sheets) mean you’re working with materials calibrated for permanence. The Cotman 45-pan set is an excellent learning and exploration tool; the Professional 24-pan set is the set you start making work with. They serve different functions and can coexist in the same studio.
Where Winsor & Newton Professional wins outright:
- Tube format, specifically the 20-tube sets, receives particular praise in aggregated reviews for colour consistency across a working session — tubes allow you to mix fresh paint each time, avoiding the crust and colour shift that pan sets develop with heavy use.
- The colour naming and documentation is the most thorough of the three ranges, making it easier to reorder specific colours and match across sessions or editions.
The decision rule: If X, then Y
If you work in illustration, journaling, or observational sketching and want to spend less than $80: Start with Gansai Tambi. The pan size, labelling, and colour clarity make it a genuinely satisfying working tool, not a stepping stone. Revisit lightfastness ratings for any colours you use in pieces intended for sale.
If you’re ready to invest seriously in colour mixing understanding and plan to spend time with YouTube instruction: Buy the Daniel Smith 6-tube split-primary set. Accept that your first few sessions will feel wasteful as you recalibrate your paint-loading instinct. That recalibration is the upgrade — the paint is just the occasion for it.
If you own a Cotman set and want a direct, well-curated replacement in professional grade: Winsor & Newton Professional half-pan 24-set is the lowest-friction upgrade. You already know the W&N colour naming conventions, the pan format will feel familiar, and the colour curation means you’re not overwhelmed by new choices.
If you paint large, fast, or en plein air (outdoors from observation): Tube format — either Daniel Smith or the Winsor & Newton Professional 20-tube set — consistently outperforms pans in aggregated reviews for volume of workable paint and session-to-session colour consistency.
Frequently Asked Questions
How much less Daniel Smith do you use compared to Cotman? Published pigment concentration data and owner review patterns both suggest roughly 30–40% less paint per equivalent wash. The practical effect is that a single Daniel Smith tube lasts significantly longer than a Cotman tube — partially offsetting the higher per-tube price. Several reviewers note the sticker shock fades quickly once they calculate the per-wash cost.
Are Gansai Tambi colours as lightfast as W&N Professional? Not as a blanket statement. Winsor & Newton Professional publishes full ASTM lightfastness ratings colour-by-colour. Kuretake’s lightfastness documentation for Gansai Tambi is less granular. For pieces displayed under glass in low UV environments or work not intended for long-term exhibition, Gansai Tambi’s lightfastness is functionally adequate for most users. For archival or exhibition work, W&N Professional or Daniel Smith’s published ratings give you more certainty.
Is the W&N Professional 24-pan set worth buying if you already own the full Cotman 45-pan set? Yes — but treat it as a different tool, not an upgrade to more colours. The Professional set’s value is in pigment quality, lightfastness, and curation. You’ll likely find yourself reaching for the 45-pan Cotman set for exploration and colour testing, and the Professional set for finished work. That’s a reasonable two-palette workflow many intermediate painters describe.
What does ‘split primary’ mean and why do Daniel Smith reviewers keep mentioning it? A split primary palette uses two versions of each primary — one biased warm, one biased cool. Because warm and cool versions of a primary share less colour overlap, they mix cleaner secondaries (greens, purples, oranges) with less unwanted muddiness. Daniel Smith’s 6-tube split-primary set is specifically configured around this principle, and it’s why reviewers recommend it alongside YouTube colour theory instruction as a system rather than just a set of tubes.
Can you mix Gansai Tambi with Western watercolours on the same palette? Reviewers who use both describe mixing Gansai Tambi and Western professional watercolours without significant technical problems — the binder systems are compatible and both are water-soluble. The practical consideration is calibrating expectations: Gansai Tambi colours can be notably brighter and more saturated than some earth tones in Western ranges, so mixtures may shift in unexpected directions until you know the palette. Artists Network’s general watercolour mixing guidance recommends testing any cross-brand combination on scrap paper before committing to a piece.