Print-on-demand is a simple and low-risk way to start a highly profitable business. You can make everyday products like t-shirts, custom dresses, posters, backpacks, books and sell them online. The on-demand printing business does not require inventory. All you must do is create a design, put it on the product, and then start selling. You can ask you if this business is promising. In this regard the custom T-shirt market worldwide is expected to cross 10 billion dollars by 2025 and shows no sign of slowing down.