SJH thermochromic ink low-temperature color change test: the print changes color as temperature drops, reversible, ideal for anti-counterfeit labels, food & beverage packaging and temperature indicators.
A full written description of the demonstration, so the content is readable without playing the video.
This video demonstrates the low-temperature color change of SJH thermochromic ink: the printed pattern flips color as temperature drops and reverses back when it returns to room temperature - for anti-counterfeit labels and temperature indicators.
The video first shows the printed sample at room temperature to record the base color as a reference. The color change of thermochromic ink is a reversible physical process, so establishing the initial color at ambient temperature is the first step in judging the effect - and the reference state every customer confirms when selecting a color.
The camera records the colour change as the sample temperature falls. Thermochromic ink contains micro-encapsulated colour-changing materials; when the temperature crosses the switching range the structure inside the capsules changes, which appears as a colour switch. The change normally completes quickly within a narrow temperature band, so the transition looks crisp with a clear boundary.
As the sample returns to room temperature the colour reverts to its initial state. This reversibility is what makes thermochromic ink durable in service: a security label passes through transport, warehousing and shelf conditions, and the colour change must trigger repeatedly without performance loss.
| Mechanism | Micro-encapsulated colour-changing material, structure changes across the switching range |
|---|---|
| Key property | Reversible colour change, repeatable |
| Verification | Triggered on site by finger warmth, an ice pack or warm air - no equipment needed |
| Typical use | Security labels, temperature indication on food & beverage packaging, promotional interactive packaging |
The security value of thermochromic ink comes from interaction: a consumer can verify authenticity with a touch of a finger and no equipment at all, which ordinary visual security cannot do. Where a tactile verification experience or cold-chain temperature indication is needed, thermochromic ink answers both the security and the functional requirement. The switching temperature can be customised to the customer environment.
Selection, detection, printing and ordering — answered.