This part of IEC 60794 describes test procedures to be used in establishing uniform requirements of optical fibre cable element, the filling compounds or flooding compounds, for the environmental property- bleeding and evaporation. This document applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors. Throughout the document, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc.