 Introduction to Ribbons
Thermal transfer printers apply voltage to a printhead that consists of 200 to 600 resistive heating elements per linear inch of printhead (dpi = dots per inch). This resistive material is covered by a thin coating or "glaze" that protects the heating elements from abrasion as the thermal transfer ribbon makes contact with it.
The line of printhead elements is in direct pressure contact with the back side of the thermal transfer ribbon. The ink side of the ribbon is in direct contact with the receiver or label stock. This ribbon and receiver "sandwich" is driven by a rubber-covered platen roller under the printhead print line at a speed consistent with the heating cycle time of the printhead.
Heat from the printing elements raise the ink to a temperature above its melting point. The molten ink transfers from the ribbon to the receiver and adheres to it. Together, the ribbon and receiver continue to move from under the printhead for a short distance before the ribbon and receiver separate. It is at this point that the image is formed.
Structure of a Thermal Transfer Ribbon
Top Coat:
- Improves ink adhesion
- Enhances the ribbon's chemical and environmental resistance
Ink:
- Creates the printed image
- Mixture of wax, resin, and pigments
- Bonds to label surface
Primer:
- Bonds ink to the base film
- Acts as a release agent during printing
- Ensures a uniform image
Base Film:
- Acts as a carrier through coating and printing process
- Varying thickness (average 4.6um)
Back Coat
- Lubricating agent that prevents wear and damage to the print head
- Reduces coefficient of friction to allow for smooth travel
- Maintains thermal resistance during printing
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Wax ribbons |
Wax/Resin Ribbons |
Resin Ribbons |
| Recommended Media |
Coated and Uncoated paper tags and labels,
Polyethylene and Polypropylene Films |
Coated paper tags and labels,
Polyethylene, Polypropylene and Polyester Films |
Polyethylene, Polypropylene, Polyester,
Vinyl and Polyimide Films |
| When to Use |
When durability isn't an issue |
When scratch and smear and/or mild chemical durability is needed |
When durability is an absolute must-have
When labels are exposed to harsh chemicals/heat |
Lowry Ribbon Program
Total Lowry Care (TLC) is the most comprehensive maintenance and consumables agreement available in the market today. What makes TLC unique is that all service, support, parts, labor and consumables (ribbons, labels, etc.) are managed under one agreement and through one company — Lowry. Discover our flexible service program to encompass ribbons.
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Ribbons Manufacturers
Iimak
Printronix
Sony Chemicals
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