👉 Preliminary cleaning or pre-preparation of materials before use is a process used in manufacturing and construction to ensure that they are free from contaminants, defects, and other issues that may cause damage or failure during operation. This step can be performed by a number of methods depending on the context and nature of the material being cleaned. In general, this involves removing any existing dirt, debris, or other impurities from the surface of the material before it is used for its intended purpose. The goal is