Appliance of twins as a way for achieving secure hidden image in infrared technology
Utilizing the situation that except image in visual part of the spectrum can be broadened to near infra red domain that is observed instrumentally, near infra red technology stated its principles. Visual color management leads and controls both domains applying standard reproduction materials. CMYKIR separation principles allow attacking the secondary monochrome image to visual colored one, implementing achromatic principles. As the same color visual output can be performed on various ways, besides mathematical calculations, for accurate reproduction twin colors system is practiced.