Using water as main carrier which is stabilized by micro-emulsion technology, Britemor® 921 (W) enables bright and crisp flaw indications on wide range of materials, including ferrous and non-ferrous metals, and non-porous ceramics. Micro-emulsions are thermodynamically stable and composition includes isotropic liquid mixtures of solvent, water, and emulsifier. Low viscosity of Britemor® 921 (W) minimizes drag out as well as overall product and rinse water consumption.