A METHOD OF MANUFACTURING A CAPSULE (12) FOR HOLDING A SUBSTANCE (14) INCLUDES PROVIDING A CAPSULE BODY (2) HAVING A CLOSED END (5) AND AN OPPOSED OPEN END (6)； PROVIDING A DIAPHRAGM (4) HAVING A CLOSED END (7) AND AN OPPOSED OPEN END (8)； PARTIALLY FILLING THE BODY (2) WITH SUBSTANCE (14)； PROVIDING A GAS-TIGHT CHAMBER； PROVIDING A NITROGEN GAS ENVIRONMENT WITHIN THE CHAMBER； APPLYING A PARTIAL VACUUM TO THE CHAMBER； SUPPORTING AN OUTER SIDE (43) OF THE BODY (2)； SUPPORTING AN INNER SIDE (102) OF THE DIAPHRAGM (4)； WHILE SUPPORTING THE BODY (2) AND THE DIAPHRAGM (4), INSERTING THE CLOSED END (7) OF THE DIAPHRAGM (4) INTO THE OPEN END 6 OF THE BODY (2) UNTIL REGIONS OF THE BODY (2) AND THE DIAPHRAGM (4) OVERLAP ONE ANOTHER, THEREBY CLOSING OFF THE OPEN END (6) OF THE BODY (2) AND FORMING A CHAMBER (104) WITHIN WHICH THE SUBSTANCE (14) IS HELD； AND HEAT WELDING THE OVERLAPPING REGIONS OF THE CAPSULE BODY (2) AND THE DIAPHRAGM (4) TO ONE ANOTHER TO HERMETICALLY SEAL THE CHAMBER (104). ACCOMPANYING DRAWING: FIGURE 1
