Roll-to-roll processing

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In the field of electronic devices, roll-to-roll processing, also known as web processing,^[1] reel-to-reel processing or R2R,^[2] is the process of creating electronic devices on a roll of flexible plastic, metal foil, or flexible glass.^[3] In other fields predating this use, it can refer to any process of applying coating, printing, or performing other processes starting with a roll of a flexible material and re-reeling after the process to create an output roll. These processes, and others such as sheeting, can be grouped together under the general term converting. When the rolls of material have been coated, laminated or printed they can be subsequently slit to their finished size on a slitter rewinder.