What is the production procedure of the paper trays or containers

What is the production procedure of the paper trays or containers

What about the paper trays production procedure
The paper food tray, burger boxes, or the snack boxes are easily found at our daily life, how are these boxes produced? Actually not a simple thing.
Firstly take the paper raw material which is food grade, design layout of developing drawings of the trays, boxes on the whole paper , also considering printing info on the expansion plans.
Then need a die cutting machine to cut the paper into expansion plan shape of the trays, boxes or containers .
Lastly , take each expansion plan shape paper forming required trays ,boxes etc by the tray forming machine.
Simple procedure can be refer to left flow chart.