The technical investigation, led by Aavin Madurai Assistant General Manager A. Muthukarthikeyan, was launched following consumer grievances regarding a chlorine-like smell in the packaged milk. Initial traceability testing on the outer surface of the packaging rolls failed to detect the issue because the first 20 meters passed inspection, but deeper layers inside the 30kg tightly wound rolls contained trapped residual gases.

Laboratory analysis at a central testing facility determined that an improper curing process during the manufacturing of the poly-film packaging, along with issues in the film’s dye application, generated volatile organic odors. Because the packaging rolls were tightly wound upon production, the chemical smell became trapped within the inner layers and bled into the immediate packaging environment during automated milk filling.

In response to the laboratory confirmation, Aavin management immediately isolated and removed the affected poly-film rolls from its processing and packaging lines to prevent further distribution to retail outlets. Furthermore, the co-operative union issued a formal show-cause notice to the third-party packaging vendor, demanding an explanation before initiating administrative action under existing regulations.