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Which of the following TTI is based on dye diffusion?

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in Food Packaging Technology by (63.0k points)
Which of the following TTI is based on dye diffusion?

(a) Electronic nose

(b) 3M Monitor Mark

(c) LifeLines Fresh-Check

(d) Vitsab Single Dot Label (TTI)

I got this question in an online quiz.

My question comes from Intelligent Packaging Systems topic in division Modern Packaging Techniques of Food Packaging Technology

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Best answer
The correct option is (b) 3M Monitor Mark

Easy explanation: 3M Monitor Mark is based on dye diffusion. A  visco-elastic material migrates into a diffusely light reflective porous matrix at a temperature dependent rate. This causes a progressive change of the light transmissivity of the porous matrix & provides a visual response. Response of indicator is the blue dye ester diffusing along a wick. The useful range of temperature & response life of the TTI are determined by type of ester & the concentration at the origin.

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