Preservation Services for Museums, Individuals, Private Collectors, and Municipalities


Doll steam engine model, 1925 before treatment
Doll steam engine model, 1925 after treatment
Doll Company

Steam Engine Model, 1925

The goal of the treatment was to preserve the object as well as returning it to a functional state. Missing parts were refabricated, and many other minor details were addressed before the engine would run. Exposed metal on the surface was treated with tannic acid to create a stable layer of ferric tannate and to darken the areas to match the original black paint. After treatment the engine was successfully run.