There are typically three main types of card stock used for playing cards: 1. Plastic-coated paper: It offers a balance between affordability and durability, making it a common choice for standard playing cards. 2. 100% Plastic: These cards are more durable and resistant to wear and tear, making them ideal for frequent use and professional play. 3. Cardboard/linen-finish: Often used for premium playing cards, they have a textured surface that enhances handling and grip. Each type has its advantages and is suitable for different preferences and purposes.