purple dye murex (Bolinus brandaris) (Gastropod) on a beach in Israel,a sea snail. Murex was at one time greatly valued as the source for purple dye. It discharges a purple ink from the hypobranchial gland in the mantle cavity as a smoke screen,from behind which it can flee. The Phoenicians,centred on Tyre,gathered the snails,crushed & boiled them with salt for several days to extract the ink. The liquid was allowed to cool & over a period of time the colour changed for yellow to green to blue & then a rich purple. The extraction of the ink & the manufacture of purple cloth made Tyre a household word in the past | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Photostock-Israel |
Bildgröße: | 5910 px × 2977 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |