Determining Direct Thermal or Thermal Transfer Media Types

Problem/Question

1. Difference between direct thermal (DT) and thermal transfer (TT).

2. How to identify direct thermal (DT) and thermal transfer (TT).

Applicable To

Consumable Labels

Resolution/Answer

Test Procedure

1. Take a sample of the media you want to test.
2. Using your fingernail or a pen cap, apply firm and quick pressure while dragging it across the media surface.
3. Observe the results of the scratch test below.

Interpreting Results:

Media Type	Scratch Test Indicator	Explanation	Printing Method
Direct Thermal	A black mark appears on the scratched area.	Direct thermal media is chemically treated to react to heat. The friction from scratching generates enough heat to activate the chemical coating.	No ribbon required, compatible with direct thermal printers.
Thermal Transfer	No black mark appears on the scratched area.	Thermal transfer media lacks the heat-sensitive chemical coating.	Ribbon required, compatible with thermal transfer printers.

This simple scratch test helps quickly determine whether your media requires a ribbon (thermal transfer) or not (direct thermal) for printing, ensuring you use the correct printing method and equipment.

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