1.1 Drawing Paper Cartridge are papers made specially for drawing purposes suitable for use with ink or pencil. These are heavier than other Drawing Papers which are light weight. These are intended for use in the preparation of permanent ink drawings of the most exact character and importance and which will be subject to severe and frequent handling.
PS 477-1965 history
1965PS 477-1965 PAKISTAN STANDARD SPECIFICATION FOR DRAWING PAPER (CARTRIGE)