Bingo Paper Cards are made of paper that is the thickness of newspaper print.  No, it's not that thick, but its the industry standard of professional, high quality bingo paper and we sell it! Paper cards are meant to be used with bingo ink markers (more on those later) and are considered disposable after one use. Bingo paper cards are sold in various forms, however the two most popular are:Bingo Sheets - Single individual bingo sheets that are given out one at a time. Bingo Books - collated "books" are bingo sheets that are glued together at the top to form a packet of different colored sheets (pages). Normally the number of "pages" in a books are equal to the number of bingo rounds you plan on playing.  Ex: 5 page books = 5 rounds of bingoSpecialty Papers - This are papers that are used for special bingo games such as bonanza games, u-pic-ems, or punch out bingo papers.