Which type of paper is best suited for printing postcards?

Cardstock is the best choice for printing postcards due to its thickness and sturdiness. It provides the durability needed for postcards that are often mailed and handled by postal services. The heavier weight of cardstock helps the postcards withstand bending and tearing, ensuring they reach their destination in good condition. Additionally, cardstock offers a smooth surface that allows for vibrant printing of colors and images, which is crucial for postcards designed to catch the eye and convey a message effectively.

In contrast, notebook paper is too thin and flexible, making it unsuitable for postcards that need to maintain their shape. Newsprint, while economical, lacks the quality and durability required for a professional-looking postcard and can deteriorate quickly due to its low weight and poor ink absorbency. Photo paper is designed for printing high-quality images but is typically glossy and not as rigid as cardstock, making it less suitable for the purpose of mailing postcards. Thus, cardstock stands out as the ideal material for this application.