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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Hart-Davis, Adam |
Taille de l’image : | 5132 px × 3404 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |