A stabilizer is a chemical solution used in the final stages of colour photographic processing. Its purpose is to enhance the longevity and durability of the dyes created during chemical development, making them more stable and resistant to fading over time. By treating prints or negatives with a stabilizer, photographers can help ensure that the colours remain vibrant and true, even when exposed to light, heat, or atmospheric conditions that might otherwise cause deterioration.
Stabilizers are particularly important in colour photography, where the dyes formed in the emulsion are more prone to chemical breakdown compared with traditional black-and-white silver images. Proper use of a stabilizer contributes to archival quality prints, helping photographers and labs produce images that retain their intended appearance for years or even decades.