Artificial alum crystals. Alum is the term given to crystallized double sulphates. They are soluble in water,have an astringent,acidic taste and crystallize in regular octahedrons. Alum is used in dyeing | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 5138 px × 3425 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |