THE GLASS MAY BE GIVEN ANY OF THE FOLLOWING
TREATMENT :
BENDING
OPAQUE MAKING
CUTTING
SILVERING
BENDING : THE GLASS MAY BE BENT INTO DESIRED SHAPE BY
PLACING IT IN OVENS IN WHICH THE TEMPERATURE CAN BE
REGULATED . THE GLASS IN THE FORM OF RODS , SHEETS , OR
TUBES IS PLACED IN SUCH OVENS AND HEATED . IT IS THEN
BENT WHEN IT IS SUITABLY HEATED .
CUTTING : THE GLASS IS CUT IN REQUIRED SIZES WITH THE
HELP OF DIAMOND ,CARBON ,ROUGH GLASS CUTTER OR
SMALL WHELLS OF HARDENDED STEEL .
OPAQUE MAKING : THE GLASS CAN ALSO BE MADE OPAQUE OR
IMPERVIOUS TO LIGHT . IT IS DONE BY GRINDING THE GLASS
SURFACE WITH EMERY . IT CAN ALSO BE ACHIEVED IDENTICALLY BY
THE APPLICATION OF HYDROFLUORIC ACID .
SILVERING : THIS PROCESS CONSISTS IN APPLYING A VERY THIN
COAT OF TIN ON THE SURFACE OF THE GLASS . THE SILVER IS
DEPOSITED ON THIS LAYER OF TIN . A SUITABLE PAINT IS THEN
APPLIED TO GIVE PROTECTION AGAINST THE ATMOSPHERIC
EFFECTS.