Walk into any art store and you will see watercolor brushes at wildly different price points. A synthetic round might cost LKR 200. A kolinsky sable round of the same size might cost LKR 5,000+. The difference comes down to the hair (or fibre) used to make the brush.
But expensive does not always mean better for your needs. This guide compares natural hair and synthetic brushes based on what actually matters when you paint.
Natural hair brushes use animal hair – most commonly kolinsky sable, red sable, squirrel, goat, or ox hair. Each animal hair has unique properties:
Synthetic brushes use man-made nylon or polyester filaments designed to mimic the properties of natural hair. Modern synthetics have improved dramatically – some are nearly indistinguishable from natural hair in performance.
Common synthetic brush lines include Princeton Velvetouch, Da Vinci Casaneo, Escoda Versatil, and many affordable options from Chinese and Korean manufacturers.
Natural hair – especially kolinsky sable and squirrel – holds significantly more water than synthetic fibres. The hair shafts have microscopic scales and a natural internal structure that acts like a reservoir.
Synthetics hold less water because the filaments are smooth and solid. You will need to reload a synthetic brush more often during long strokes or washes.
Winner: Natural hair, by a clear margin. This matters most for wet-on-wet techniques and large washes.
“Snap” is how a brush springs back to its original shape after a stroke. Good snap gives you control – the brush responds predictably.
Kolinsky sable has the best natural snap of any hair type. The brush bends under pressure but returns to a perfect point. Squirrel has zero snap – it is floppy by design.
Synthetics generally have good to excellent snap. The filaments are springy by nature. Some painters find synthetics too springy – the brush fights back rather than flowing with your hand.
Winner: Depends on preference. Kolinsky for controlled snap, synthetics if you want firm spring, squirrel if you want none.
A good brush should form a fine point (rounds) or clean edge (flats) when wet. Kolinsky sable is unmatched here – the tapered hair naturally comes to a needle-fine point that holds through long strokes.
Quality synthetics can achieve a good point, but it tends to break apart (“splay”) sooner during a stroke. Cheaper synthetics lose their point quickly.
Winner: Natural hair (kolinsky) for rounds. For flats, the difference is smaller.
Paint release describes how the brush delivers pigment to paper. Natural hair releases paint gradually and evenly – you can lay down a smooth, consistent wash from start to finish.
Synthetics tend to release paint in a rush at the start, then starve quickly. This makes even washes harder to achieve. Modern premium synthetics (like Casaneo) have improved this significantly with crimped filaments that mimic natural hair structure.
Winner: Natural hair, especially for washes and glazing.
Here synthetics win decisively. Synthetic fibres do not degrade in water, do not get eaten by moths, do not lose their shape over time, and tolerate rough handling better. A synthetic brush used carelessly will last longer than a natural brush treated the same way.
Natural hair is fragile. Leaving a sable brush standing in water for even a few hours can permanently destroy its shape. Moths will eat stored natural brushes if you are unlucky. The hair gradually wears down with use.
Winner: Synthetic, by a wide margin.
Synthetics are dramatically cheaper. A set of 6 quality synthetic brushes might cost what a single kolinsky sable brush costs. This is the biggest practical consideration for most painters.
| Factor | Natural Hair | Synthetic |
|---|---|---|
| Water holding | Excellent | Moderate |
| Snap/spring | Varies by hair type | Good to firm |
| Point retention | Excellent (kolinsky) | Good (premium) to fair |
| Paint release | Gradual, even | Quick release, then starves |
| Durability | Fragile – needs care | Tough – tolerates abuse |
| Price | LKR 1,500-10,000+ | LKR 150-1,500 |
| Maintenance | High (reshape, store flat) | Low |
| Best for | Finished work, wet techniques | Practice, detail, mixed media |
Start with synthetics. You will drop them, leave them in water, scrub them on rough paper, and press too hard. All of that is fine – it is how you learn brush control. Destroying a LKR 200 synthetic brush while learning is fine. Destroying a LKR 5,000 kolinsky is painful.
Get a basic set covering the essential brush shapes – a medium round (size 8-10), a small round (size 4), and a flat or wash brush. This covers 90% of beginner needs.
Consider a hybrid approach: one or two quality natural hair brushes for your most-used sizes, and synthetics for everything else. A good kolinsky size 8 round will transform your wash work and detail painting. Keep synthetics for lifting, scrubbing, masking, and experimental work.
Stick with synthetics. Modern mid-range synthetics at the LKR 300-800 price point perform well for all standard watercolor techniques. Pair them with good paper and paint – your starter kit budget is better spent on materials than on a single expensive brush.
Some brands mix natural and synthetic fibres to combine the water-holding capacity of natural hair with the durability and snap of synthetics. These blended brushes are a good middle ground, typically priced between pure synthetic and pure natural options.
Examples include brushes marketed as “imitation sable” or “sable-synthetic blend.” They offer about 70-80% of the performance of natural hair at 30-40% of the price.
Regardless of type, brush care extends their life:
For dedicated watercolorists who paint regularly, yes – a good kolinsky round is one of the best investments you can make. The water capacity and point retention genuinely improve your painting. But only buy them once your technique is developed enough to benefit. You cannot buy skill.
Squirrel is specialist – brilliant for large washes and mop work because it holds enormous amounts of water. It has no snap, so it is useless for detail. Consider a squirrel wash brush as an addition to your kit, not a replacement for your rounds.
Absolutely. Many professional watercolorists use synthetics exclusively. The quality gap has narrowed significantly. Daniel Smith, Princeton, and Da Vinci all make synthetic brushes used by professionals worldwide.
Technically yes, but acrylic degrades natural hair rapidly. Use synthetics for acrylics. If you paint both mediums, keep separate brush sets.
Need help choosing specific brushes? Read our buying guide for Sri Lanka for specific recommendations at every budget. Pair your brushes with the right paper for the best results.
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