What is Hand Finishing?

Hand finishing encompasses several distinct operations, each requiring specific skills and tools: **Edge honing (刃付け, hazuke)**—The final sharpening of the cutting edge using water stones or ceramic stones. The worker establishes the primary edge angle (typically 40-50° included angle for convex edges, 30-40° for bevelled edges) and any micro-bevel. The technique varies by edge type: - Convex edges are honed with a rolling motion that creates the continuous curve - Bevelled edges use a flat stone at a fixed angle - Hamaguri edges require a specific convex honing technique A skilled hazuke worker can feel the burr forming on the opposite side of the edge and knows exactly when to stop—removing too much material creates a weak edge, too little leaves it dull. **Ride line calibration (裏合わせ, ura-awase)**—Adjusting the curvature of the inner blade face so the two blades make correct contact. The worker checks contact by closing the scissors slowly and observing the contact point progression from pivot to tip. Proper ride should show a single contact point that moves smoothly toward the tip, with no gaps or binding. Corrections are made by selective lapping of the inner face on flat stones. **Ura-suki refinement**—In premium Japanese scissors, the concave hollow on the inner blade face is checked and adjusted by hand. The worker uses a reference flat (often a ground steel plate) to verify the concavity depth (typically 0.05-0.15mm) and uniformity. Inconsistent ura-suki causes uneven cutting resistance along the blade length. **Tension adjustment**—Setting the screw or click-type tension system to the correct resistance. This requires testing the scissors by cutting—too tight causes hand fatigue and potential blade damage, too loose causes the blades to separate during cutting and fold hair. The optimal tension varies by blade length, weight, and intended cutting style (point cutting requires lighter tension than blunt cutting). **Final testing (試し切り, tameshigiri)**—The finished scissors are tested by cutting tissue paper, synthetic hair, or cotton gauze. The worker evaluates cutting smoothness, blade separation, and any catching or pushing of material. Scissors that fail are returned for further adjustment. The time investment is substantial. A fully hand-finished pair of 6-inch professional scissors requires: - Edge honing: 15-25 minutes - Ride line calibration: 10-20 minutes - Ura-suki check and adjustment: 5-15 minutes - Tension setting and testing: 5-10 minutes - Total: 35-70 minutes, more for complex designs This is the primary cost driver for premium Japanese scissors. The steel and heat treatment for a US$100 scissor and a US$800 scissor may be identical—the difference is 15 minutes versus 70 minutes of hand finishing by a craftsperson earning US$40-60 per hour.