The requirements on industrially produced products are continually increasing. This leads to higher requirements on the input materials. The consequence is that increased cleanliness is a major factor. The products used have not only a greater effectiveness in their later use, but also are often more dangerous. This has main effects on two areas. One is work safety - personnel can not be put into danger, the other is product safety - the danger of contamination to the product and the surroundings must be avoided.