The developer kit for Gallyas staining, which is composed of three stock solutions, is an integral part of the Gallyas staining kit. In the context of histological research and diagnostics, it is primarily used to study neurodegeneration processes such as Alzheimer's disease.

The specific composition of the kit enables detailed visualization of neurofibril bundles characteristic of Alzheimer's disease. Thus, changes in neuronal morphology indicative of degenerative processes can be visualized.

The stock solutions of the kit have chemical properties that allow specific reaction with protein aggregates of neurofibrils. This results in the formation of silver-protein complexes that produce a dark stain that is readily visible under the microscope.

In the application process, the developer kit is applied to the histological specimen. Through a series of oxidation and reduction reactions, the silver in the protein aggregates is reduced and precipitates as a visible, dark product. This physical development allows detailed visualization of neurofibril bundles and other neuropathological changes. The developer kit can be reordered as a stand-alone component of the Gallyas staining kit.