The BHK-40-A permanent markers are engineered for writing, marking, and drawing on a wide variety of surfaces, including paper, cardboard, plastic, glass, and metal . This versatility makes the range suitable for cross-departmental use, reducing the need for multiple product lines within a single organisation.
Each marker features fast-drying, low-odour, smudge-proof, and water-resistant ink, ensuring legibility and permanence even in demanding operational environments such as NHS clinical settings, logistics hubs, and technical facilities . The markers are available with round or chisel tips, providing flexibility for both fine writing and broader marking tasks, with a typical line width of approximately 1–3 mm, dependent on tip selection.