Blotting paper, commonly known as absorbent paper, is a specially designed material used to soak up excess liquid, particularly ink, oil, or water. Made from cotton fibers or wood pulp, blotting paper is highly porous, allowing it to quickly absorb moisture through capillary action. Historically, it has played a crucial role in writing, especially before the advent of quick-drying ink and ballpoint pens. Writers and calligraphers would place blotting paper over freshly written text to prevent smudging and ensure clean, legible documents. The term « blotting » originates from Old English blætan, meaning « to stain » or « darken. »
Beyond its historical use in writing, blotting paper serves a variety of purposes across different industries. In cosmetics, thin sheets of blotting paper are used to remove excess oil from the skin, offering a quick and discreet solution for maintaining a matte complexion. In laboratories, specialized blotting papers play an essential role in chemical analysis, chromatography, and protein transfer processes. Even in industrial settings, certain types of blotting paper are used to filter liquids or absorb unwanted residues.Natural blotting paper is often untreated, but some varieties are infused with powdered minerals such as calcium carbonate or kaolin to enhance absorption. The effectiveness of blotting paper depends on its thickness, fiber composition, and manufacturing process. Some high-quality blotting papers are made using traditional techniques, preserving their softness and durability. While digital technology has reduced the need for ink blotting, blotting paper remains widely used in niche markets, maintaining its status as a simple yet effective tool in everyday life.