Step 1: Understanding the Concept:
Smart, active, and intelligent packaging systems utilize specific data carriers, indicators, or sensors to monitor, record, and transmit information regarding product identity, temperature history, and quality.
Step 2: Detailed Explanation:
Let us compare the cost and popularity of the listed packaging data carriers:
1. Barcode (A): A simple, optically readable, one-dimensional (1D) or two-dimensional (2D, e.g., QR codes) pattern printed on the packaging film or paper. It requires no electronic components, chipsets, or specialized chemical materials. The cost of printing a barcode is essentially negligible, making it the least expensive and by far the most popular form of packaging data carrier used worldwide.
2. RFID (Radio Frequency Identification) (B): Uses microchips and antennas to transmit data via radio waves. While highly efficient for automated inventory tracking, RFID tags are significantly more expensive than barcodes.
3. TTIs (Time-Temperature Indicators) (C): Chemical or enzymatic indicators that show irreversible color changes when temperature abuses occur. They are expensive and restricted to specific cold-chain monitoring.
4. Biosensors (D): Biological-analytical devices that detect pathogens or metabolites; they are highly expensive and complex.
Step 3: Final Answer:
Thus, the least expensive and most popular data carrier is Barcode.