These charts have an overall size of 12.5" x 10". Subjective reference chart for checking color rendition of TV systems. Consists of three primary (red, green, blue) and three secondary (yellow, cyan, magenta) colors, plus 4 grey levels (4%, 45%, 60%, and 80%) in color bar format. Use to evaluate overall system color reproduction by comparing transmitted image with original chart. Also for use as a field reference aid in adjusting monitor on playback of tapes. Not for quantitative use.