Die cut is a paper cutting process which is done to achieve a special design shape for covers, presentation folders, cards and packages. A die cut process is essential to give a final shape to the package, and it is a process that is done before binding and pasting the package.
The die cut artwork must be done with any Pantone color, as it will let the printer know that it is for die cut. The artwork printing file is 2D, but if you want to check the final 3D package shape and design for mass products, you must request for a sample. Lastly, you must also see to it that the folding lines are straight with die cut, so that the final product looks neat.