Hot stamping is the most economical lanyard imprinting method. It's also best suited for shorter term lanyard applications.
The reason for this is the amount of color laid down on the material. Color is transferred from a thin film using pressure and heat applied by a metal plate which bears the imprint information and is held inside an automatic press. The color applied is just enough to cover the material.
The material best suited for hot stamping is polyester which feels and looks more like cotton than nylon due to its texture and non-shiny appearance. Polyester is available in a variety of colors.
The most popular widths are 3/8" (shoelace) and 5/8" (budget). If your budget is tight this is the lanyard imprinting method for you. You will almost allows find these lanyards printed in a single color on one or both sides. With single sided printing being the most common and cost effective.