// Stable temperature – stable coatings
Ambient press room temperatures and heat generated within the printing process cause the coating temperature to gradually increase. The warming of the coating increases the rate of evaporation of the amines, resulting in a drop in the pH, changing the viscosity and the coating density.
With a constant coating temperature, the change in viscosity and pH can be tempered, maintaining a stable coating mixture, with more consistent print results, at faster press speeds, for a longer periods of time (about 2–3 hours). The temperature is suggested to be set between 68 and 72 °F.
// Our coating cooling system is quick!
With the Coating Cooling System from Duo-Technik, overcoming a temperature difference of 15°F in less than 4 minutes is achievable. Based on our technology and installation methods, the levels of micro-foam created in the coating could be reduced. The following technical details characterize our system:
- The Coating Cooling System operates with ice cold water (about 39–43°F
- The cold water is circulated through our insulated heat exchangers (installed on each printing unit) until the individual desired ink temperature are reached.
The reason for the rapid temperature correction is a direct result of our separate coating circuit. We achieve this since we are able to circulate a high volume of coating through the heat exchanger in a short period of time.
The entire system is connected in the ink circuit as to utilize the automatic cleaning cycle of the printing press thus eliminating the need for any manual cleaning processes.
The entire system is connected in the ink circuit as to utilize the automatic cleaning cycle of the printing press thus eliminating the need for any manual cleaning processes.
