Whatman 1 is a type of filter paper commonly used in laboratories for various applications, including qualitative analysis and filtration. It is made from high-quality cellulose fibers, which provide excellent clarity and strength. This filter paper has a medium retention rate, making it suitable for separating fine particles from liquids. The thickness of Whatman 1 allows it to withstand moderate pressure during filtration processes. It is often used in conjunction with Büchner funnels and vacuum filtration setups. Its versatility makes it a popular choice among scientists and researchers in fields such as chemistry and biology.