CoolVu Technology

CoolVu Technology

CoolVu labels -operation principals

CoolVu labels are time-temperature indicators that are based on a temperature dependent dissolution (etching) process of a fine aluminum layer. The CoolVu time-temperature indicators arrive as two separate labels of which one consist of a printed aluminum label while the other is a transparent label bearing the etchant in its adhesive layer. The activation of the label is achieved by adhering the adhesive label to the surface of the aluminum label. At the first phase after activation, the aluminum layer becomes thinner as a function of the time and temperature, still preserving its mirror like appearance, Figure 1a. At more advanced stages of the process the active spot turns from being a metallic mirror into black, Figure 1b. Towards the end of its life, the active spot slowly adopts the color that was printed at its backside and at the end of its life the full color of the background is revealed, Figure 1c.



 Figure 1: CoolVu labels, a - freshly activated label, b - mid life label, c - expired label.
Yet another approach to make the time-temperature evolution clearly visible is to print the label in a way that the active spot is divided into three sectors, each of them disappearing at a different pace, Figure 2.



Figure 2: CoolVu labels, a - freshly activated label, b - early mid-life label, b - late mid-life label, d - expired label.

OnVu™ Technology

OnVu™ Technology

OnVu™  -operation principals

OnVu™  Technology
OnVu™ indicators can be calibrated to cater for the different spoilage behavior of various foods and beverages. These tailored indicators are highly accurate and consistent in recording and displaying the freshness of the products, based on their time and temperature histories. As the perishable goods are packaged, an OnVu™ TTI is applied and activated using an ultra violet (UV) light source. A filter is then placed over the label to protect it from deliberate or accidental recharging. The label activation and filter placement processes are carried out automatically by a range of OnVu™-capable label dispensers that have been developed to meet industry needs1

Oxygen Sensors Technology

Oxygen Sensors Technology

under development