Bangkok:Warnings are circulating on social media regarding the use of permanent markers on food bags. Concerns have been raised about the possibility of chemicals from the markers seeping through the plastic and contaminating food.
According to Thai News Agency, Assoc. Prof. Dr. Busarin Jongcharoenyanont, a Deputy Dean at Kasetsart University, confirmed that writing directly on food bags with permanent markers poses a risk of ink seeping through the plastic and leaching into the food. This can lead to the accumulation of chemicals in the body, affecting vital organs such as the liver and kidneys.
Experts explain that the plastic structure and temperature play a crucial role in this process. The interconnected chains in plastic soften when heated, increasing the likelihood of ink penetration. Additionally, foods with high fat content can dissolve the ink, further facilitating contamination.
Certain foods, such as spicy curries, porridge, and hot drinks, pose higher risks due to their heat and fat content. Conversely, dry foods not exposed to heat present a lower risk. However, experts still caution against direct writing on packaging.
Issues also arise with other packaging materials like plastic cups and paper boxes. Ink transfer, or "set-off," can occur when items are stacked, allowing ink from one surface to contact another.
Experts recommend avoiding writing directly on packaging and suggest using sticky notes or stickers as safer alternatives. For necessary printing, food-grade ink is advised to ensure consumer safety.
The warning against using permanent markers on food bags is particularly pertinent for hot and fatty foods, which facilitate chemical leaching. Retailers and consumers are encouraged to adopt safer practices to protect long-term health.