ZD421d: direct thermal
The ZD421d prints on heat-sensitive media without a ribbon. It suits labels with controlled life and exposure requirements.
ZD421t: thermal transfer
The ZD421t uses a ribbon to transfer the image, supporting a wider choice of media and improved durability for many applications.
Decide using the actual label
Size, material, required life, heat, abrasion and throughput should be assessed before selecting the variant and resolution. Maximum media width also depends on how the ribbon is loaded, so confirm the exact configuration rather than ordering by the ZD421 family name alone.
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| Criterion | ZD421d | ZD421t with ribbon roll |
|---|---|---|
| Print method | Direct thermal, no ribbon | Thermal transfer, ribbon required |
| Maximum media width | 108 mm | 112 mm |
| Available resolution | 203 dpi; 300 dpi optional | 203 dpi; 300 dpi optional |
Do not confuse the ZD421t with the cartridge model
Zebra lists separate thermal-transfer roll and ribbon-cartridge versions. The roll version supports 74 m or 300 m ribbon by configuration; the cartridge is a different loading system with a 74 m ribbon and a stated maximum media width of 118 mm. Specify the exact model, label stock, ribbon and interface options in the quotation request.
Points to validate
- ZD421d for straightforward direct-thermal workflows
- ZD421t for broader media choice and durability
- Validate media, resolution and required interfaces
Frequently asked questions
What is the difference between the ZD421d and ZD421t?
The ZD421d is direct thermal and does not use a ribbon; the ZD421t is thermal transfer and uses a ribbon. Choose between them based on label life, exposure, media and workflow.
Does the ZD421d use a ribbon?
No. The direct-thermal variant prints on compatible heat-sensitive labels.
Can both variants be included in a quote request?
Yes. Describe the labels and workflow so suitable ZD421d and ZD421t configurations can be compared.
Do the ZD421t and the ZD421 cartridge model use the same ribbon?
No. Zebra documents ribbon rolls for the thermal-transfer ZD421 and a separate cartridge system for the cartridge model. Confirm the exact model before buying supplies.
