How to Test Hairdressing Scissors Before You Buy
Share
Written by Matt Grumley, a hairdresser and scissorsmith. Founder of ShearGenius, est. 2007. 35+ years behind the chair and at the sharpening stone.
Most hairdressers buy scissors by vibe. The photo looks nice, the brand sounds Japanese, the rep smiles. Then the scissor arrives, folds hair, and lives in a drawer. You can avoid every single version of that mistake with a five-minute test routine that works on any scissor, in any shop, with no special equipment. Here is exactly what I do before I put a scissor in my own kit.
Test 1 — The Spec Sheet Test
Before you even pick the scissor up, ask two questions. What steel? — the answer should be a specific grade (Hitachi ATS-314, Japanese Cobalt Alloy, VG10, Takefu White Paper, 440C). "Japanese steel" with no grade is a red flag. What hardness? — the answer should be a specific HRC range (56-58, 58-60, 60-62). If the brand cannot answer either question off the top of their head, they do not know what they are selling you.
Test 2 — The Sight Test
Open the scissor fully and sight down the ride line under a bright light. You are looking for three things: a smooth continuous curve on the cutting edge (true convex), no chips or nicks, and perfectly matched blade length from pivot to tip. A bevel edge shows a distinct angular shoulder; a semi-convex looks flat on the inside face. See the blade geometry guide.
Test 3 — The Drop Test
Hold the scissor by one ring with the blades open at 12 o'clock. Let the upper blade fall under its own weight. It should close smoothly and stop somewhere between 3 and 4 o'clock. Slams shut = too loose. Barely moves = too tight. A scissor that cannot be adjusted to the drop-test sweet spot has a worn or damaged pivot. Full procedure: how to adjust scissor tension.
Test 4 — The Fit Test
Slide the scissor onto your hand. Your ring finger should sit comfortably in the finger ring; your thumb should enter the thumb ring without strain or stretch. The blade should extend down your palm to roughly the first knuckle of your middle finger — see our blade length guide. If the ring sizes are wrong, a finger rest and a replacement ring can help, but a scissor that does not fit your hand at all is the wrong tool.
Test 5 — The Balance Test
Close the scissor and balance it on your index finger at the pivot. It should sit roughly level. A scissor that nose-dives into the blade is tip-heavy and will tire your wrist on long days. One that tips toward the handle is back-heavy and will feel clumsy on slide cuts. Balance matters more than most hairdressers realise.
Test 6 — The Sound Test
Open and close the scissor slowly 6-8 times. Listen. A properly tensioned, well-oiled premium scissor makes a smooth, quiet whisper. Grinding, clicking, rasping or squeaking all tell you something is wrong — dry pivot, grit in the bearing, or uneven blade pressure. A bad sound at the shop is a bad sound at year three.
Optional Test 7 — The Test Cut
If the shop will let you — and any serious scissorsmith should — cut a small section of your own hair above the ear or at the nape. A true convex edge slices cleanly with zero drag. Anything less and you will feel the difference immediately.
What To Do If the Scissor Fails
Walk. A scissor that fails even one of these tests at the shop will fail worse after six months of daily use. The only exception is tension — a good shop will adjust tension to your preference for free before you leave with it.