Ammonia → D-Glucosamine

Participants

Reaction Steps

The coating composition is prepared by mixing 42.2 g of water with 40 g of the acrylic binder of example 1. 15.0 g of D-glucosamine hydrochloride is then added followed by an appropriate amount of aqueous ammonia (25% by weight) in order to render the pH alkaline (above 7.0). The emulsion is then stirred at room temperature for 30 minutes. The resulting coating composition is then applied by a coating bar (K1 to K5) onto the desired substrate (for example paper or polymer film) and imaged using a CO2 IR laser to give brown markings of high contrast (0.5 to 4 watt, 100 to 1000 mm/s).

Provenance & Evidence