sentences:  A record of the color content in black and white was thereby created and could be reconstituted by projecting the film through an identical filter.The three colored stripes (red, green and blue-violet) of the filter had to be precisely oriented parallel to the film length.When an exposure was made, the varying proportion of each color reflected from the subject passed through the filter and was recorded on the film beneath each of the embossed lenticular bands as areas of strips in groups of three, each strip varying in density according to the received color value.