Food Packaging Ink Safty Issue
(here are some food packaging boxes for your reference）
In recent years, food safety problems caused by food packaging emerge in endlessly, which has laid a hidden danger for the health of consumers. Not long ago, the content of mineral oil in the chocolate brand dove products of Mars, a food giant, was found to be "extremely high", and the mineral oil composition is likely to come from the lubricating oil used in the production and packaging process of machinery and equipment, and the printing oil ink containing the mineral oil composition on the packaging paper. It can be seen that, as the raw material of food packaging, the safety of ink is one of the key factors to ensure the safety of food packaging. So, why is the ink on food packaging harmful to food safety? How to ensure the safety of food packaging ink? This article will explore with you.
Safety hazards of food packaging inkMigration is a common phenomenon that affects the safety of food packaging. The use of unsafe ink is easy to cause ink components to migrate to food. There are two main mechanisms for the migration of ink components to the packaged food. One is dirty migration, that is, during the stacking process of printed materials, the printing ink layer inevitably contacts with the other side of the printing substrate. The possible migration components in the printing ink rub against the unprinted surface of the substrate under the action of high pressure and other external forces. When the unprinted surface of the substrate contacts with the packaged food, the printing The possible migration components in the ink will run to the food. The other is diffusion migration, that is, the possible migration of the food packaging printing ink through the packaging substrate to the food, thus affecting the food in the packaging. Even rigid materials such as plastic bottles are not effective barriers, nor can they completely isolate the diffusion of migrating materials. From the mechanism of migration, it can be seen that the occurrence of migration is related to many factors: ink formula, substrate selection, packaging structure, printing process control, storage of printed products, later use, etc. the migration of ink should be analyzed according to the specific situation.
It can be seen that to ensure the "tip of the tongue safety", from the ink point of view, it is necessary to choose a safe low migration ink. In this regard, many ink manufacturers made a positive response, launched a non-toxic, tasteless low migration ink. As early as more than ten years ago, the ink giant Siegwerk group (hereinafter referred to as "Siegwerk") introduced low migration ink solutions, including sb, WB, UV and all vegetable oil-based offset ink products, to meet the challenge of food safety.
Safety countermeasures of food packaging inkIt is urgent to take measures to reduce or avoid the potential safety hazards caused by ink migration in food packaging. The safety hazards caused by ink migration have become an important issue in the development of green packaging in China. Therefore, this puts forward higher requirements for ink manufacturers. Next, the author will discuss how to improve the safety of food packaging ink from the perspective of ink manufacturers.
The raw materials of oil control ink
The safety of food packaging is closely related to the composition of ink, and ink is a mixture of many components, whose safety depends on the safety of its "ingredients are raw materials". Strengthening the control of ink raw materials is one of the key measures to ensure the safety of food packaging ink. This requires ink manufacturers to select ink raw materials as much as possible from the reference standards and provisions of the relevant items, and strictly test the performance of raw materials. Siegwerk's practice in this respect is worth learning from other ink manufacturers. Siegwerk implements strict raw material introduction process and the strictest EU standard, from proposing raw material sample demand, to laboratory test, production test, approval of the group's health, safety and environment department, to commercial approval and determination of raw materials, so as to ensure that each batch of raw materials is non-toxic and has no impact on ink safety.