Brazilian rubber industry, illustration. Rubber being vulcanised. Vulcanisation is the process by which rubber is strengthened by adding sulphur. From 'Rubber hunters' by Louis Boussenard (1893). | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Collection Abecasis |
Bildgröße: | 2779 px × 3461 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |