1. A PROCESS FOR THE MANUFACTURE OF CHLORINE AND CAUSTIC WHICH COMPRISES PASSING AN ALKALI METAL CHLORIDE SOLUTION INTO AN ELECTROLYTIC CELL FROM THE ANODE SIDE, ELECTROLYZING SAID ALKALI METAL CHLORIDE SOLUTION IN SAID CELL, WITHDRAWING CAUSTIC SOLUTION FROM THE CATHODE SIDE OF SAID CELL AND WITHDRAWING CHLORINE FROMTHE ANODE SIDE OF SAID CELL, SAID CELL COMPRISING A NON-CONDUCTING POROUS DIAPHRAGM HELD BETWEEN AND IN CONTACT WITH A FORAMINOUS SHEET METAL CATHODE AND A FORAMINOUS SHEET TITANIUM ANODE SUPPORT, AND AN ANODE WHICH IS A COATING OF A PLATINUM METAL OF SAID ANODE SUPPORT.