The blade is everything in precision cutting. A sharp blade requires less pressure, produces a cleaner edge, and gives significantly more control over the cut — which is why keeping a good stock of replacement blades is as important as the knife itself. These are the genuine Olfa KB blades, made in Japan to the same exacting standard as the rest of the Olfa range, and the correct replacement for the Olfa AK-1 Standard Art Knife.
Olfa's blade-making heritage traces back to traditional Japanese sword-making techniques — a lineage that informs every stage of the production process, from the selection of premium carbon tool steel through to the precise multi-step honing process that gives each blade its edge. The result is a blade with exceptional initial sharpness and superior edge retention, meaning it holds that sharpness longer through use than cheaper alternatives. The blade width is 6mm with an acutely pointed tip suited to detailed and intricate cutting work.
These blades are compatible with the Olfa AK-1 Standard Art Knife and the Olfa AK-4 Cushion Grip Art Knife. They are suitable for cutting paper, card, acetate, vinyl, foam core, film, fabric, and a wide range of other fine art, craft, and graphic design materials.
The pack of 25 gives a practical working supply — enough to change blades regularly as recommended without running out mid-project. A sharp blade is a safe blade, and replacing blades frequently is both good practice and good economics when working with precision cutting tools.
Important: Always use appropriate care when changing and disposing of used blades. Follow the disposal guidelines recommended by your local authority for used cutting blades.
Which Olfa knives do KB blades fit? KB blades are the correct replacement for the Olfa AK-1 Standard Art Knife and the Olfa AK-4 Cushion Grip Art Knife. Always use genuine Olfa replacement blades to ensure correct fit, safe operation, and the cutting performance the knife is designed to deliver.
How often should blades be changed? As soon as any drag, pulling, or reduction in cutting quality is noticed. A blade that requires extra pressure to cut is both less accurate and less safe than a sharp one. With a pack of 25, there is no reason to persist with a dull blade — change it and get back to clean, controlled cutting immediately.
What materials can KB blades cut? They are suited to paper, card, mount board, acetate, vinyl, film, foam core, rubber, fabric, and a wide range of art, craft, graphic design, and model-making materials. For best results on any material, use with an Olfa self-healing cutting mat to protect your work surface and extend blade life.
Are these genuine Olfa blades? Yes. These are genuine Olfa KB blades, made in Japan. Always use genuine Olfa blades in Olfa knives — non-genuine alternatives may not fit correctly or meet the safety and performance standards the knife is designed around.
How many blades are in the pack? 25 blades per pack.
