Why Packaging and Labelling Matter in Processed Food Quality

Every time you pick up a packet of biscuits, a carton of juice, or a pouch of ready-to-eat curry from a store shelf, you’re relying on two invisible guardians – packaging and labelling. These aren’t just about attractive designs or catchy brand names. They are the frontline defence that keeps processed food safe, fresh, and honest. Without proper packaging, food would spoil rapidly. Without accurate labelling, consumers would have no way to know what they’re actually eating. Together, they form the backbone of processed food quality assurance.

What does food packaging actually do? 🔗

At its core, food packaging is a protective system designed to shield food from physical damage, microbial contamination, and environmental factors like oxygen, moisture, light, and temperature. According to research published in the journal Molecules, packaging plays a crucial role in food quality, safety, and shelf-life extension by controlling the interactions between food and its surrounding environment.

The moment a processed food item leaves the production line, it begins a journey through warehouses, trucks, retail shelves, and finally, your kitchen. At every stage, it faces risks – rough handling, fluctuating temperatures, humidity, and exposure to air. The right packaging acts as a barrier against all of these threats, ensuring the product reaches you in its intended form.

Protection from physical damage 🔗

Processed foods like chips, biscuits, and canned goods are vulnerable to crushing, vibration, and impact during transport. Packaging materials such as corrugated cardboard, rigid plastics, and metal cans absorb mechanical shocks and prevent breakage. This physical protection also prevents the creation of entry points for bacteria – even a small crack in packaging can expose food to microbial contamination.

Barrier against oxygen and moisture 🔗

Oxygen and moisture are two of the biggest enemies of processed food quality. Oxygen fuels oxidation, leading to rancidity in oils and fats, colour changes, and loss of vitamins. Moisture causes soggy textures, promotes mould growth, and accelerates chemical reactions that degrade food. Research in the Journal of King Saud University highlights that selecting the right packaging material is essential to avoid negative effects on the quality, safety, and shelf stability of food products. For instance, waxed cardboard keeps moisture away from dry goods like cereals, while metallic laminates and multi-layer plastic films provide excellent oxygen barriers for snack foods, nuts, and processed meats.

Light and temperature control 🔗

Light exposure can degrade vitamins (particularly riboflavin and vitamin C) and cause off-flavours through photochemical reactions. This is why products like milk, cooking oils, and certain beverages are stored in opaque or tinted containers. Temperature fluctuations are managed through insulated packaging and cold-chain systems, which are especially critical for dairy, frozen, and refrigerated processed foods.

Types of packaging materials used in processed food 🔗

Not all foods need the same kind of packaging. The choice of material depends on the food’s composition, sensitivity, required shelf life, and distribution conditions. Here’s a look at the main materials used in the food industry.

Glass 🔗

Glass offers excellent barrier properties against gases and moisture and does not interact chemically with food. It’s ideal for light-sensitive products like sauces, pickles, and jams. However, its weight and fragility limit its use in certain supply chains.

Metal (tin and aluminium) 🔗

Metal cans provide a superior oxygen and light barrier, making them perfect for long shelf-life products like canned vegetables, fish, and soups. As noted in a report by Inside Packaging, the hermetic seal offered by metal cans provides robust protection against oxygen and light, and canned foods can have shelf lives ranging from one to five years.

Plastics and laminates 🔗

Plastic is the most versatile packaging material in the food industry. It can be moulded into flexible pouches, rigid containers, and multi-layer films. Multi-layer packaging – which combines layers of plastic, paper, and aluminium – achieves superior protection against oxygen, moisture, light, and odours. Materials like BOPP (Biaxially Oriented Polypropylene) are specifically designed to maintain freshness by providing excellent moisture and oxygen barriers. However, there is a concern with plastics – certain chemical compounds from packaging materials can migrate into food during storage, a process known as migration. Factors influencing migration include the type of polymer, storage temperature, duration of contact, and the food type.

Paper and cardboard 🔗

Paper-based packaging is commonly used for dry goods, bakery products, and cereals. Coated or waxed paper adds moisture resistance. With growing sustainability concerns, paper-based packaging is gaining popularity as an eco-friendly alternative to plastic, though it generally offers less barrier protection on its own.

Advanced packaging technologies 🔗

The packaging industry has moved well beyond simple wrappers and boxes. Modern technologies are actively working to extend shelf life and maintain food safety in innovative ways.

Modified atmosphere packaging (MAP) 🔗

MAP involves replacing the air inside a package with a carefully balanced mixture of gases – typically reduced oxygen and increased carbon dioxide – to slow down spoilage. This technique is widely used for fresh-cut salads, ready-to-eat meals, and processed meats. By controlling the internal gas environment, MAP inhibits bacterial growth while preserving the food’s texture, colour, and nutritional content.

Vacuum packaging 🔗

Vacuum packaging removes air from the package before sealing, eliminating the oxygen that drives many spoilage processes. It is especially effective for preserving cheeses, cured meats, and other protein-rich foods prone to oxidative deterioration.

Active packaging 🔗

Unlike traditional packaging that merely acts as a passive barrier, active packaging interacts directly with the food to improve its quality. Examples include oxygen absorbers that slow spoilage, antimicrobial films that inhibit bacterial growth, and ethylene removers that delay ripening in fruits. According to a review in Molecules, active packaging represents a deliberate, controlled interaction between the packaging and the food, designed to maximise product quality, safety, and shelf life.

Smart (intelligent) packaging 🔗

Smart packaging uses embedded sensors and indicators to monitor conditions like temperature, gas composition, and freshness in real time. Time-temperature indicators (TTIs), ripeness indicators, and biosensors fall into this category. These technologies provide both supply chain managers and consumers with real-time data on product quality, helping reduce food waste and improve safety.

Why food labelling matters 🔗

If packaging protects the food, labelling informs the consumer. A food label is the primary communication channel between the manufacturer and the buyer. It tells you what the product contains, how it was made, when it expires, and how to store it safely. Without proper labelling, consumers are left in the dark – unable to make informed choices about nutrition, allergens, or safety.

The Codex Alimentarius Commission, a joint body of the FAO and WHO, sets international standards and guidelines for food labelling. These standards help governments worldwide create consistent rules that protect consumers and promote fair trade practices. The Codex General Standard for the Labelling of Prepackaged Foods outlines essential requirements such as ingredient lists, nutritional declarations, allergen warnings, and date markings.

Key information on a food label 🔗

A well-designed food label typically includes the following mandatory details:

Product name: Must accurately reflect the nature of the food and not be misleading. For example, a product labelled “mango drink” must actually contain mango as a key ingredient.

Ingredient list: All ingredients must be listed in descending order of their weight or volume. This gives consumers clarity about what constitutes the bulk of the product.

Nutritional information: Standardised nutritional panels declare energy, fat, protein, carbohydrates, sugars, fibre, and sodium content – typically per 100 g or per serving. This helps consumers compare products and make healthier choices.

Allergen declaration: Common allergens such as milk, soy, nuts, wheat (gluten), and shellfish must be clearly identified. This is one of the most strictly enforced labelling requirements globally and can be a matter of life and death for individuals with severe allergies.

Date markings: “Best before” and “Use by” dates guide consumers on freshness and safety. Consuming food past the “Use by” date can pose genuine health risks, while “Best before” dates relate more to quality than safety.

Storage instructions: Directions like “keep refrigerated,” “store in a cool, dry place,” or “consume within 3 days of opening” ensure the product maintains its quality after purchase.

Manufacturer details and batch number: These allow for traceability. In case of a contamination incident or quality complaint, batch numbers help authorities trace the problem back to its source and issue targeted recalls.

Food labelling regulations in India 🔗

In India, food labelling is governed by the Food Safety and Standards Authority of India (FSSAI) under the Food Safety and Standards (Labelling and Display) Regulations, 2020. These regulations apply to all pre-packaged food products sold in the country.

Under FSSAI rules, every packaged food product must display the FSSAI logo and licence number, product name, ingredient list, nutritional information, net quantity, date of manufacture, expiry date, and the manufacturer’s name and address. India also has a unique requirement – the vegetarian and non-vegetarian symbol. A green dot inside a green square indicates vegetarian food, while a brown dot inside a brown square indicates non-vegetarian food. This is especially important in a country with a large vegetarian population.

Additionally, FSSAI mandates front-of-pack labelling for key nutritional data. The energy value, total fat, trans fat, total sugar, and salt content per serving – along with their percentage contribution to recommended daily allowances – must be clearly displayed on the front of the package. This helps consumers quickly assess a product’s nutritional profile without having to search for the fine print on the back.

FSSAI has also introduced strict rules against misleading claims. A product cannot be labelled “healthy” or “nutritious” if it is high in sodium, sugar, or saturated fat. Such regulations align with Codex Alimentarius guidelines that advocate for clear allergen labelling and evidence-based nutritional claims.

Packaging and labelling: their role in regulatory compliance 🔗

Packaging and labelling aren’t just consumer conveniences – they are legal requirements. Regulatory bodies worldwide set strict standards that food manufacturers must follow. Non-compliance can result in product recalls, fines, legal action, and severe reputational damage.

In the European Union, food contact materials must comply with Regulation (EC) 1935/2004, which ensures that packaging does not transfer harmful substances to food in quantities that could endanger health. In India, FSSAI’s Packaging and Labelling regulations specify which materials are acceptable for food contact and set limits on chemical migration.

Labelling regulations also protect against food fraud. By mandating accurate ingredient lists, country-of-origin declarations, and allergen information, regulatory frameworks make it harder for unscrupulous manufacturers to misrepresent their products. This transparency is vital for building and maintaining consumer trust.

Consumer expectations and the trust factor 🔗

Modern consumers are more informed and health-conscious than ever. They read labels, compare nutritional profiles, check for artificial additives, and look for certifications like organic, non-GMO, or fair-trade. Packaging and labelling directly influence purchasing decisions.

A product with clear, honest labelling and intact, tamper-evident packaging builds confidence. On the other hand, unclear labels, missing information, or damaged packaging immediately raise red flags. In the processed food market, where consumers can’t see, smell, or taste the product before buying, packaging and labelling serve as the primary trust signals.

The rise of clean-label trends – where consumers prefer products with shorter, recognisable ingredient lists – has further pushed manufacturers to improve both their formulations and their labelling transparency. Consumers want to know not just what’s in their food, but where it came from and how it was made.

Environmental considerations in food packaging 🔗

While the protective role of packaging is undeniable, the environmental cost of packaging waste is a growing global concern. Millions of tonnes of plastic packaging end up in landfills and oceans every year. This has prompted a shift towards sustainable packaging solutions – biodegradable materials, plant-based bioplastics, edible films, and recyclable mono-material designs.

However, sustainability must be balanced with food safety. A biodegradable material that fails to protect food from contamination or spoilage defeats the purpose entirely. The challenge for the food industry is to develop packaging that is both environmentally responsible and functionally effective – a balance that researchers and manufacturers are actively working to achieve.

What do you think? How often do you check the labels on processed food before buying? Do you believe current labelling regulations give consumers enough information to make truly informed choices about food safety and nutrition?

References

1. https://pmc.ncbi.nlm.nih.gov/articles/PMC7956554/
2. https://pmc.ncbi.nlm.nih.gov/articles/PMC8325021/
3. https://inside-packaging.nridigital.com/inside_packaging_may24/the_role_of_packaging_in_maintaining_food_quality
4. https://www.fao.org/fao-who-codexalimentarius/thematic-areas/nutrition-labelling/en/
5. https://fssai.gov.in/cms/food-safety-and-standards-regulations.php
6. https://www.who.int/news-room/events/detail/2024/11/25/default-calendar/47th-session-of-the-FAO-WHO-Codex-Alimentarius-Commission-adopts-new-standards
7. https://www.sciencedirect.com/science/article/pii/S1319562X21003090