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Package design

How color changes

Cold-chain indicator for monitoring threshold temperature

Temperature range:15~30℃
RoHS Compliant

MELTMARK™ is single-use indicators irreversibly change its color from white to red by reaching or exceeding color changing temperature. It is especially designed for low temperature monitoring such as cold chain monitoring and warehouse/refrigerator temperature monitoring for food and pharmaceutical application.

Reversible Irreversible Semi-reversible


  • Low temperature monitoring
  • 1 point temperature indication
  • Irreversible, single-use
  • Temperature range: 15 °C to 30°C
  • Self-adhesive and easy to apply on various location. (The back side adhesive material)


Product line up

Color Change Temperature(℃) Before→After Dimensions JAN Code
MK-15 15
White to red

15 x 35 mm

MK-20 20 4582130422793
MK-25 25 4582130422809
MK-30 30 4582130422816



Apply where temperature monitoring is required.

Usage consideration

  • Make sure not to touch reactive part when handling case and label. MELTMARK™ is highly sensitive indicator and body heat can change its color.
  • Do not rub the color changing part. This may cause abnormal color change.
  • Apply on a clean and dry surface.
  • Apply on flat surface. MELTMARK™ might drop from uneven applying surface.
  • Avoid applying on curved surface and bending indicators.
  • Do not cut MELTMARK™. This may reduce the durability of product and cause abnormal color change.


MELTMARK™ should be stored under storing temperature to avoid color change.

  • MK-15 and 20: Below 0°C
  • MK-25: Below 10 °C


Applying label

  • Remove water, oil, rust and dust from the surface before applying labels. Contamination and uneven surfaces can cause labels to drop and abnormal color change.
  • Remove release film and apply where temperature monitoring is required and press the surface of label gently with finger or cloth. Strong rubbing might damage the label and affect performance (abnormal color change).
  • Apply labels on flat surface. Labels are not designed to apply on curved and corner surface.
  • Do not change shape of products. Cutting products with a cutter knife or re-shaping can reduce the durability and cause abnormal color change.


  • Make sure not to touch reactive part when handling case and label. MELTMARK™ is highly sensitive indicator and body heat can.
  • Do not use electromagnetic induction heating, for example, microwave oven, under high pressure condition and high vacuum condition.

Information on the toxic substance in the raw material

MELTMARK™ contains no toxic substance according GHS classification.


Directive of RoHS

MELTMARK™ doesn’t contain chemical substance prohibited in the RoHS directive.


Hazards identification

Immediate health, physical, and environmental hazards: The environmental properties of this product present a low environmental hazard. This product, when used under reasonable conditions and in accordance with the directions for use, should not present a health hazard. However, use or processing of the product in a manner not in accordance with the product's directions for use may affect the performance of the product and may present potential health and safety hazards.



The information in this sheet is believed to be correct as of the date of issue Nor the selling, nor the producing company make no warranties, expressed or implied, including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose or course of performance or usage of trade. The user is responsible for determining whether this product is fit for a particular purpose and suitable for user's method of use or application. Given the variety of factors that can affect the use and application of this product, some of which are uniquely within the user's knowledge and control, it is essential that the user evaluate this product to determine whether it is fit for a particular purpose and suitable for user's method of use or application.



*THERMOLABEL, RETOMARK, MEDESHILL, UVLABEL, DEWLABEL and Thermo-Paint in all the contents including digital catalog in this website are registered trademarks in Japan of NiGK Corporation.

THERMOLABELis registered trademark of NiGK Corporation, in Japan,New Zealand and Philippines.

THERMOLABELisregistered trademark of NiGK Corporation, in Japan,Australia,European Union and Switzerland.


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