A method and a system for determining a charge for a communication in a communications network is provided. The one-time switches become inoperative upon switching in response to the presence of a load exceeding a critical value, thereby disconnecting an electrical connection. The substrate carrying the patterned reflective film is then contacted with a solution comprising oxyanions. The system of correctioncalibration of color spectrum of an image captured from an object and perceived by the observer is provided with attributes such as flexibility, portability, agility, automation, low labor cost and economically viable.