Johnson Test Papers’ Nylon membrane filters are made of supported, naturally hydrophilic membrane for versatile use and consistent performance. This particular category of laboratory filtration equipment is specifically designed to wet out evenly and retain its superior strength use in general filtration or medical assays Being naturally hydrophilic, Johnson Test Papers’ Nylon membrane does not require wetting agents that can interfere with biological processes. Additionally, its high surface area successfully immobilises antigens, antibodies and other proteins.