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The two current leading thermal label printing technologies, both in which we specialize, are direct thermal and thermal transfer. This article highlights all the differences between the two thermal printing technologies for label printing, and hopefully this article can help you decide the best printing method for your labeling requirements.
A brief comparison: direct thermal is only for short term applications. It is lower in cost and requires no ink, toner, or ribbon, however it only prints in black. Thermal transfer printing is for longer term applications requiring a high print quality. Thermal transfer printing requires a ribbon and can print in color.
The biggest difference between thermal transfer and direct thermal printing is transfer printing requires a ribbon whereas direct thermal printing does not.
Controlled heat is the main component in thermal printing; thermal barcode label printers work by using controlled heat to apply an image onto the label.
Thermal label printers, both industrial and mini-desktop types are perfect for barcode printing since they produce accurate and high-quality images that have very good edge definition. Sharp print makes the scanning of barcodes easier. Thermal printers are designed to print within very tight spaces and produce the exact bar widths to the thousandths of an inch (x dimension) every time they print.
With direct thermal printing, the print head applies heat to coated thermal labels turning them dark when heat is applied to specific areas of the label. There is zero consumption of ink or toner, and you will need a supply of direct thermal label material.
In contrast, in the thermal transfer printing process, the print head heats a ribbon that transfers wax or resin to the paper or film labels, leaving blank labels printed in either black or color.
- Provides excellent image quality, is durable, and can be used for many applications
- Accepts a greater range of media such as paper and films including polyester and polypropylene materials
- Creates extremely durable drum labeling, storage, freezer, weatherproof, asset tags, and other labels requiring special properties
- Excellent for harsh environments and can withstand extreme temperature, ultraviolet exposure, chemicals, sterilization, certain solvents and more
- Can print in color and black and white
- High operating cost
- Changing ribbons can be a difficult and timely process
- More time required to load the media compared to direct thermal printing
- Ensuring correct ribbon for label material is always necessary
- Lower grade ribbons can cause an excessive build-up of ink, requiring more frequent cleaning
- Disposal of used ribbons can be considered not environmentally-friendly
Thermal Transfer printing applications include: Shipping and distribution, mailing, product identification; circuit board tracking; permanent marking and identification; samples and file tracking; asset tagging; inventory identification; retail and general office, certification labels such as UL/CSA, archive, laboratory specimens; cold storage and freezers; and weatherproof and waterproof outdoor applications
DIRECT THERMAL LABEL PRINTING
- Cost less to operate than inkjet, laser, impact, and thermal transfer printers
- No ribbon, and no ink or toner is ever required
- Durable and easy to use
- More environmentally friendly since you do not have to dispose of used ink ribbons.
- Thermal media images may fade over time
- Overexposure to heat can cause material to darken and become unreadable
- Label material is prone to marking if rubbed or scuffed extensively
- Limited choice of direct thermal label materials
- Causes greater wear to the printhead, therefore expect to replace the print head more often
- Only print in Black
Direct Thermal printing applications include: shipping labels, distribution, identification, freight packaging including compliance labels, inventory, receipts, label coupons, event tickets; citations and parking tickets; name tags; visitor passes; other short term labeling applications and more. For more reasons why you should choose Direct Thermal over Thermal Transfer read this artilceTECHNICAL DATA SHEETS