What is a Kolinsky brush and why does it cost more?
A Kolinsky brush uses tail hair from the Siberian weasel, chosen because the hair tapers naturally and recovers its shape. The hair is scarce, sorted by hand and graded by length, which is why a Kolinsky brush costs more than a synthetic one of the same size.
Why the hair is graded
Kolinsky hair arrives in bundles of mixed length and thickness. To build a brush that holds a point, the hair is sorted by length so the tips align and the base is dense. That sorting is manual, and it is the main reason the finished brush costs what it does.
What the point does for nail work
In nail acrylic, the brush must pick up a bead, place it precisely, and return to a point. Kolinsky does that because the natural tip curves inward when wet. A synthetic can be tapered to imitate the effect, but the recovery after pressing is different, and experienced technicians notice it.
How to buy it without overpaying
Grade matters more than the label. Ask for the hair length range, the ferrule diameter and the finished tip size in millimetres, and compare those numbers rather than the words on the handle. We manufacture Kolinsky and Kolinsky-blend brushes and can quote both so the price difference is visible line by line.
Common questions
Are Kolinsky brushes legal to sell?
Kolinsky hair is traded internationally, but rules differ by country and by species listing. Buyers should confirm the import requirement for their own market before ordering.
How can I tell Kolinsky from a blend?
Check the tip under magnification and test recovery: a high-content Kolinsky returns to a point after pressing. Ask the supplier for the stated hair content in writing.