Printing inks containing a certain reactive substance indicating
oxygen, and suitable for printing onto plastic materials have been produced.
This kind of indicator signals for package leakage and can be used for
perishable foods in packages with modified atmosphere. Another type of oxygen
indicator has been designed to be activated during the sterilisation
process, and is most suitable for medical applications. In addition to oxygen
indicators, attention was paid to the concept of freshness indicators.
Humidity indicator and ethylene indicator developments were started in the
project and, later on, advanced in separate projects. Every indicator system
is based on a distinctive chemical reaction. Thus, several active substances
were identified and tested, and the most promising systems were chosen for
further development. The formulation and design of the ink-jet ink has been
carried out. A large number of raw material combinations have been tried out
to find a viable system. Preliminary reliability studies in real operational
environment in food or medical packages have been performed. Two types of
oxygen indicators are under evaluation at potential customers.
|Title of host publication||Intelligen Products and Systems|
|Subtitle of host publication||Technology theme - Final report|
|Place of Publication||Espoo|
|Publisher||VTT Technical Research Centre of Finland|
|ISBN (Print)||978-951-38-7009-6 |
|Publication status||Published - 2007|
|MoE publication type||D2 Article in professional manuals or guides or professional information systems or text book material|