The removal of scale from hard water from sinks, taps, toilet bowls, washbasins, baths, kettles and steam irons. All use some form of acid as the active ingredient.

The corrosion resistance of iron and steel can be improved by treatment with sulfuric and phosphoric acids. Other metals are also affected through the introduction of chemicals.

This guide explains ways ensure good practice when using model risk assessments in schools. There are practical examples of how to manage, use, adaptat and recording risk assessments used. There is also a Excel Spreadsheet - E171 (below) which can be used as a planning and Risk Assessment recording tool.

The following document is a list of the documents and other materials you will find on the D&T website.