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FUNCTIONAL INDICATORS IN PACKAGING: WEARABLE HEALTH MONITORS FOR FOOD

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Packaging is transforming from a passive protector to a dynamic feedback system.
Companies now have the power to proactively manage spoilage, reduce waste, and
enhance consumer trust—all through packaging that functions like a health
monitor for food. Food quality indicators, including oxygen depletion monitors,
RFID tags, and freshness sensors, enable real-time tracking of product health,
offering significant advantages in reducing spoilage and ensuring safety.

As the industry pivots toward digitalization and sustainability, integrating
these advanced solutions will be critical for businesses looking to stay
competitive.

This analysis explores the recent advancements in functional indicators in
packaging. However, our Packaging Report 2025 will further explore trends like
refillable, modified atmosphere, and minimalist packaging and their role in the
sustainability and digitization of the packaging industry.

Fill out the form below to get early access to the report!

ADVANCED FUNCTIONAL FOOD QUALITY INDICATORS TRANSFORMING PACKAGING

These eco-friendly indicators come in various forms, each designed to provide
specific information about the product:

* Dynamic Colorimetric Indicators: Leveraging specialized dyes or inks, these
indicators offer real-time data on environmental factors like temperature
shifts and time-based degradation. By undergoing color changes, these systems
provide immediate, visual insights into product freshness and spoilage risks,
allowing for precise shelf-life management—beyond traditional expiration
labels.
* Gas Sensing Technology: These integrated advanced gas sensors within
packaging detect volatile organic compounds (VOCs) or toxic gases emitted
during spoilage. By monitoring the buildup of gases like CO₂ and ethylene,
these sensors deliver early spoilage alerts, enabling both retailers and
consumers to act before visible or olfactory signs appear—critical for
reducing food waste.
* Microbial Indicators: Bio-based indicators that detect pathogenic bacteria or
microbial activity provide a proactive solution for food safety. These
systems trigger a change in color, texture, or other physical properties upon
exposure to harmful microorganisms, ensuring real-time contamination
detection and enhancing food safety protocols at every step of the supply
chain.

LEADING INNOVATORS IN FUNCTIONAL FOOD QUALITY INDICATORS PACKAGING

Research institutions and companies are actively driving advancements in this
area, as shown by the growing number of patents they are filing.

Notably, the VTT Technical Research Centre of Finland and the Korea Food
Research Institute are the leading innovation in this technology. As
state-funded research institutions with a strong emphasis on R&D in the food and
packaging sectors, their active involvement highlights the promising potential
of smart label indicators as a key area of technological advancement with
significant prospects for future commercialization.

REAL-WORLD APPLICATIONS OF FUNCTIONAL FOOD QUALITY INDICATORS IN PACKAGING

INNOVATIVE FOOD PACKAGING SHEET THAT PREVENTS FREEZING AND INDICATES
DECOMPOSITION

Tokai and Kansai University have developed a food packaging sheet to prevent
food from solidifying at temperatures below 0°C while indicating the extent of
food decomposition.

Key Highlights of the innovation-

1. This sheet has a layer that shows when food starts to decompose and another
layer with a peptide to prevent freezing. Alternatively, the sheet can
combine both functions in one non-freezing layer with the indicator and
peptide. The invention also includes an indicator within the packaging sheet
that effectively signals the degree of food decomposition.
2. The packaging sheet can be made from various materials, including synthetic
resins, biodegradable resins (such as polyvinyl alcohol and polylactic
acid), and animal/plant polymers like collagen and chitosan. This offers
flexibility in tailoring the packaging for different food types while
keeping it sustainable and eco-friendly.
3. One notable feature is the option for the packaging to be edible or
water-soluble. This aligns with growing trends in sustainable packaging.
This can either be consumed with the food or washed away, addressing the
issue of waste reduction.
4. The innovation leverages ammonia as a key indicator of food decomposition,
using pH-sensitive dyes like anthocyanins that change color to signal
spoilage. This enhances real-time monitoring for both consumers and supply
chains.

IMPROVING PERISHABLE PRODUCT TRACKING IN THE SUPPLY CHAIN USING ADAPTIVE LABELS

West Pak Avocado LLC has developed a supply chain management system with
adaptive labels for perishable products.

Key Highlights of the innovation-

1. These labels use visible and invisible ink that changes based on
environmental conditions like temperature and humidity.
2. As products move through the supply chain, processing waypoints activate the
invisible ink, revealing information encoded on the label in invisible ink.
3. This system helps track processing steps, identify spoilage, and reroute
products based on real-time conditions.

PRINTABLE FRESHNESS SENSORS FOR REAL-TIME MONITORING OF PERISHABLE ITEMS

Kroger Co. has developed printable freshness sensors that track the freshness of
perishable items in real time.

Key highlights of the innovation-

1. These sensors can be printed onto substrates like paper, making them easy to
integrate into labels, packaging, or directly onto products.
2. They detect analytes such as amines and TVB-N compounds released during
decay and bacterial growth. The sensors then convert this data into signals
that are transmitted wirelessly.
3. The receiving devices analyze these signals to determine freshness levels,
enabling real-time monitoring of the item’s freshness throughout its entire
journey from production to consumption.

There is no specific public announcement regarding large-scale
commercialization. However, Kroger has been actively working on various
technology partnerships and innovations to push its freshness initiatives
forward. For instance, Kroger has collaborated with NVIDIA to enhance its tech
capabilities, including AI-based freshness management in stores .

The freshness detection technology mentioned in the patent integrates wireless
sensor data with real-time monitoring systems. This allows for potential use
across a variety of perishable goods in the grocery sector. It further aligns
well with Kroger’s broader strategy of leveraging IoT and AI technologies to
optimize the customer experience and enhance product quality. Although direct
adoption or partnerships focused solely on this sensor technology haven’t been
widely publicized, it’s clear that Kroger is incorporating advanced tech
solutions into its freshness management processes .

MULTIFUNCTIONAL THERMAL INDICATOR FOR ENHANCED TEMPERATURE MONITORING OF
PACKAGED MEDICATIONS

Starkrug LLC has created a multifunctional thermal exposure indicator to monitor
the temperature and thermal load of packaged items, such as medications.

Key insights from the innovation-

1. The indicator features multiple layers with thermochromic pigments that
change color in reversible, semi-reversible, and irreversible ways at
various temperature thresholds.
2. This design distinguishes between temporary temperature fluctuations and
permanent degradation.
3. The layers adhere to a reflective base and are protected by a transparent
cover, making them suitable for packaging.
4. The indicator can be integrated into various products, including packaging
and logistics systems, to ensure temperature-sensitive goods are stored and
transported under optimal conditions.

The patent’s inclusion of insulin indicates a clear direction toward an
application in healthcare, where ensuring the correct storage conditions for
medicines like insulin is crucial. Additionally, because the technology uses
multilayer indicators that can handle exposure to both hot and cold
temperatures, it’s well-suited for cold-chain logistics, where maintaining
precise temperature conditions during the distribution of goods is critical.

PATH FORWARD

Companies that seamlessly merge technology with consumer needs will drive the
future of packaging with integrated functional indicators. As the demand for
intelligent packaging grows, the industry will see increased pressure on R&D
heads to balance technological feasibility with cost-effectiveness and
regulatory compliance.

Successfully navigating these complexities requires a clear strategy, from
selecting appropriate materials to understanding patent landscapes and
optimizing implementation. Position yourself as a leader in this evolving
market. Click the button below to schedule a consultation with GreyB’s expert
packaging consultants.

Get in touch

Authored By – Sukha Singh and Aman Maurya, Patent Analytics

Edited By – Ridhima, Market Research

Also read – 5 Intelligent Packaging Solutions and Startups Working on Them

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