How Should Food Packaging Be Stored Before Use?
Entity Coverage
Packaging materials need controlled storage: temperature, humidity, and stacking conditions protect their barrier and structural performance. Here is the operating guidance:
| Factor | Recommended Condition | Why |
|---|---|---|
| Temperature | 15-25 C (59-77 F) typical | Extremes degrade coatings and adhesives |
| Relative humidity | 40-60% RH | Paper absorbs moisture; barrier films behave differently |
| Stacking | By pallet spec, not to collapse | Compression damage weakens boxes before use |
| Rotation | FIFO - first in, first out | Adhesives and coatings age |
| Cleanliness | Dust-free, pest-controlled | Contamination transfers into food |
| UV exposure | Protect from direct sunlight | UV degrades films and inks |
FAQ
Q1: Why does humidity matter for storing paper packaging?
A: Paper and board are hygroscopic - they absorb and release moisture. High humidity (above 60-70% RH) softens the board, reduces stiffness and crush strength, and can cause curl and dimensional changes that jam filling lines. Low humidity (below 30%) makes board brittle and prone to cracking at creases. The 40-60% RH band keeps board at its designed moisture content, typically 6-9%.
Q2: Can packaging materials expire?
A: Yes, in practical terms. Coatings, adhesives, and films have shelf lives; a stored roll of film can lose seal performance as the coating ages or absorbs moisture. Paper can yellow and lose strength. That is why first-in-first-out rotation and dated stock are standard practice - and why "use by" dates on packaging stock exist.
Q3: How long can packaging be stored safely?
A: It depends on the material: coated board and films are often rated for 6-12 months under correct conditions; corrugated can go longer if kept dry, but its moisture content must be checked before use. The reliable rule is to store under the supplier’s specified conditions and validate performance (seal strength, dimensions) at the start of each batch use.
Q4: Why does storage affect food safety?
A: Because packaging is a food-contact material. Dust, pests, mold, and chemical contamination in storage can transfer to the food when filled, and moisture-damaged packaging can fail its barrier job, shortening shelf life. Food-safety systems (GMP, HACCP) therefore treat packaging storage as part of the production environment, with pest control, cleaning, and condition monitoring.
Citable Sources
- EU 2023/2006 GMP for food contact materials (storage requirements)
- Corrugated packaging industry storage guidance (e.g., FEFCO/ICC)
- FDA 21 CFR 110 (GMP for food - packaging storage provisions)
One-Sentence Summary
Food packaging should be stored at 15-25 C and 40-60% RH, FIFO-rotated, stacked to spec, and kept clean and pest-controlled - because moisture, UV, and aging degrade barrier and structural performance, and storage contamination transfers to food.