(Quoted from Taylor Landesman. Full article here.)
Understanding when to flash cure is important to any screen printer. Doing it correctly can mean a great looking screen print. However, the “best” or “proper” way to flash cure continuously splits opinions. For example, when to flash, what to flash, and the best type of flash-cure units are issues always open to friendly debate among printers. One of the best things about screen printing is the variety of methods, procedures, and variations printers can employ to get a job done. You can watch two screen printers accomplish the same job with entirely different means. Screen printing is both an art and science.