Infinite Sets. If you continue to study this subject you will find discussions about infinite sets, and the idea of different sizes of infinity. That subject has special names like Aleph-null (how many Natural Numbers), Aleph-one and so on, which are used to measure the sizes of sets.
For decades, glossy paper, the type used in magazines, was made using a white clay called kaolin (named after the Chinese region Kao-Ling where it was mined to produce porcelain).
This is the stuff we usually by in 500-sheet reams, measured in pounds. Bond paper is also called text weight paper. Cover Paper â Heavier card stock paper generally used for business cards, greeting cards, covers, menus, and postcards, etc. Cover paper is also called card weight paper, or card stock.