The Definition of Knife Safety

Definition of Knife Safety

Knife safety is the set of practices, tool choices, protective equipment and training used to prevent cuts and lacerations when workers use knives and other bladed hand tools. It applies to utility knives, box cutters and carpet knives in warehouses, retail, construction and manufacturing, as well as chef's knives, boning knives and other blades in food service and meat processing.

Cuts from hand knives are among the most common workplace injuries. Most are caused by a blade slipping, cutting toward the body or the hand holding the material, using a dull or damaged blade, or handling exposed blades during storage, changing and disposal. While many cuts are minor, deep lacerations can damage tendons and nerves in the hand and lead to lost workdays or permanent loss of function.

Knife safety combines choosing the right tool for the job, using correct cutting technique, keeping blades in good condition, wearing suitable gloves and handling blades properly when they are not in use.

Safe Knife Use

Cutting technique

• Cut away from the body: position the work so the blade moves away from your body, legs and the hand holding the material.
• Keep the guiding hand clear: keep fingers out of the cutting path, and in food prep curl the fingertips under while guiding food.
• Use a stable surface: cut on a secure, flat surface. Place a damp cloth or nonslip mat under cutting boards so they do not slide.
• Use controlled force: make several shallow passes rather than forcing one deep cut, which can cause the blade to slip or snap.
• Stay focused: do not walk with an open blade, gesture with a knife or try to catch a falling knife. Step back and let it fall.

Choosing the right tool

• Self-retracting knives: the blade pulls back automatically when it leaves the material, reducing cuts during use and when the knife is set down.
• Safety cutters and concealed blades: tools with a hidden or guarded blade work well for opening boxes, strapping and shrink wrap.
• Ceramic or rounded-tip blades: some designs lower the chance of puncture wounds and deep cuts.
• Task-specific tools: use strapping cutters, scissors, film cutters or powered equipment instead of a utility knife when they fit the job better.
• Food service knives: use the right knife for each task, such as a boning knife for deboning and a serrated knife for bread.

Sharpening and maintenance

A sharp blade is generally safer than a dull one because it needs less force and is less likely to slip. Utility knife blades should be changed as soon as they become dull, chipped or rusty. Kitchen knives should be sharpened and honed regularly by trained staff, with handles kept clean, dry and free of grease. Damaged handles or loose blades should be taken out of service.

Protective Equipment and Blade Handling

Cut-resistant gloves

Cut-resistant gloves reduce the severity of cuts but do not make a worker cut-proof. In the United States, cut resistance is commonly rated under ANSI/ISEA 105, which uses a nine-level scale from A1 to A9 based on the grams of force needed for a blade to cut through the material in a standardized test. Higher levels resist more force:

• A1 to A3: lighter protection, roughly 200 to 1,499 grams, for tasks such as light material handling and small parts assembly.
• A4 to A6: moderate to high protection, roughly 1,500 to 3,999 grams, for tasks such as handling sheet metal, glass or frequent utility knife use.
• A7 to A9: very high protection, 4,000 grams and above, for tasks such as heavy metal stamping and some meat processing.

Glove selection should be based on a hazard assessment and should also consider grip, dexterity and puncture resistance. Gloves rated for cuts may not protect well against punctures from blade tips. In food service, a cut-resistant glove is often worn on the non-knife hand, sometimes with a food-safe glove over it. Glove selection is part of the employer's broader personal protective equipment (PPE) program.

Storage, changing and disposal

• Retract or cover blades when not in use, and store knives in a knife block, magnetic strip, sheath or designated drawer, never loose in a drawer or pocket.
• Do not leave knives in a sink full of soapy water where they cannot be seen. Wash them separately and immediately.
• Change blades with the knife pointed away from the body, using tools designed for safe blade changes when available.
• Dispose of used blades in a puncture-resistant blade container, not loose in trash bags.

Training and supervision

Workers should be trained on the tools they use, the correct cutting technique and blade handling, and how to report injuries. A job hazard analysis for frequent cutting tasks can identify where a knife can be replaced with a safer tool or where better gloves are needed. Good housekeeping keeps loose blades off counters and floors.

First Aid for Knife Cuts

• Control bleeding: apply firm, direct pressure with a clean cloth or dressing and raise the injured area if possible.
• Clean and cover: rinse minor cuts with clean water and cover them with a sterile dressing.
• Get medical care: seek care for deep or gaping cuts, bleeding that will not stop, numbness or loss of movement, or contaminated wounds.
• Protect others: follow bloodborne pathogens precautions when helping an injured coworker and cleaning up blood.

Employers should keep a stocked first aid kit nearby and record and review cut injuries to find patterns.

Example of Knife Safety

At a distribution center, receiving clerks opened hundreds of cartons each shift using fixed-blade utility knives. Over several months, the site recorded a cluster of hand lacerations, including one that required stitches when a blade slipped off a taped seam and cut the clerk's guiding hand. Investigators found that clerks often cut toward their bodies on low pallets, reused dull blades to save time and dropped used blades into regular trash cans.

The site replaced fixed-blade knives with self-retracting safety cutters, issued ANSI/ISEA 105 rated cut-resistant gloves selected after a hazard assessment, installed blade disposal containers at each station and raised pallets to a better working height. Supervisors coached clerks on cutting away from the body during daily huddles. Hand lacerations dropped sharply over the next quarter.

Frequently Asked Questions: Knife Safety

Is a sharp knife really safer than a dull knife?

Generally, yes. A dull blade needs more force and is more likely to slip off the material, which often leads to cuts. A sharp blade cuts with less effort and more control.

What cut level glove do I need for a utility knife?

It depends on the task and how often the knife is used. Many employers choose mid-range ANSI/ISEA 105 levels for frequent box cutting, but the final choice should come from a hazard assessment that also weighs dexterity and grip.

Are cut-resistant gloves cut-proof?

No. Cut-resistant gloves reduce the chance and severity of a cut but can still be cut, especially with a sawing motion, and many offer limited protection against punctures.

How does knife safety apply in commercial kitchens?

Kitchen workers use knives constantly, often under time pressure. Safe practices include stable cutting boards, proper grip, washing knives separately and storing them correctly. See kitchen safety for related hazards.