Kem Playing Cards - Kem Arrow - Black Gold Design (100% Cellulose Acetate Platic Playing Cards) 100% Plastic Kem Cards are widely regarded as the world's finest playing card. Kem cards are made entirely of cellulose acetate material, a durable plastic used in playing card production since the early 1900s. These cards are scuff and break resistant and completely washable. Set includes two decks and a convenient storage box. Available in Bridge or Poker size as well as Regular or Jumbo Index.