Fixáló

Fixáló is a Hungarian term referring to an agent or device that fixes, stabilizes, or preserves something. In everyday use it can denote a substance that sets a surface, finishes a process, or prevents change, depending on the context.

In textiles and dyeing, a fixáló acts as a fixing agent that improves colorfastness by binding dye to fibers. Common approaches include mordants and chemical after-treatments that reduce washout and fading, especially on natural fabrics or bright pigments.

In photography, a fixáló (fixer) is a chemical solution that stabilizes a developed image by dissolving remaining unreduced silver halide. Typical fixers use ammonium or sodium thiosulfate; proper washing and ventilation are important for safety and image retention.

In cosmetics, a fixáló is a setting product designed to prolong makeup wear. Setting sprays, powders and gels form a protective film or improve adhesion of pigments. Formulations vary in finish (matte or dewy) and may pose irritation risks for sensitive skin.

In biology and histology, fixatives preserve tissue samples for microscopy. Common agents include formaldehyde, paraformaldehyde, and glutaraldehyde, which cross-link proteins to maintain structure. Fixation can affect morphology and antigenicity, and requires safety precautions and proper disposal.

The term derives from Latin fixare, meaning to fasten. Related terms include fixative and fixing agent.