Other treatments come into the category of 'interventive' conservation. They include cleaning and reintegration, to strengthen fragile objects, reveal original surface decoration or technology, and restore shape. Interventive treatment makes the object more stable, but also more attractive and comprehensible to the viewer. It is usually undertaken on items that are to go on public display. Before embarking on any interventive treatment, the conservator carefully examines the object and records evidence of use, manufacture, materials, techniques or design.