Olea capensis wood materials. It is also the one of the world's hardest woods according to the Janka hardness test. The timber has a good abrasion resistance and is very strong. It is an excellent turnery wood, and is used for a wide range of decorative items. Olea capensis Olea capensis, also known by the common name black ironwood, is an African tree species belonging to the Olive family (Oleaceae). It is widespread in Sub-Saharan Africa from the east in Somalia, Ethiopia and Sudan, south to the tip of South Africa, and west to Cameroon, Sierra Leone and the Islands of the
Walter Janka exile in Mexico, where together with Paul Merker and Alexander Abusch he founded the "Free Germany" (""Freies Deutschland"") movement. In Mexico he ran the publishing business "El Libro Libre", which also employed the exiled German writer Anna Seghers. In 1946 Janka took on the leadership of the Mexican section of the German Communist party (KPD). After the end of the Second World War Janka returned, in April 1947, to what was Soviet occupation zone, later to become German Democratic Repbulic in 1949. In 1947 he married his long-standing partner, a translator called Charlotte (Lotte) Scholz. The couples' two children, André