DGK Color Tools 3 in 1 White Balance and Exposure Control Tool (set of 3 cards): The DGK Color Tools 3 in 1 white balance and exposure control card is our premium product for accurate and easy white balance and exposure control. Cards display 100% n-Chrome coated areas of pure white / 18% gray / absolute black. Made in the USA by DGK Color Tools out of sturdy card stock. Essential for every film or digital photographer:This is an essential tool for every film or digital photographer. The cards aid in determining exposure, adjusting white balance and color balance, adjusting lighting ratio and checking light distribution. For accurate exposure, reflectance must equal exactly 18%. The card creates an objective reference to be used in the studio or in your post-production work to compare and analyze any color differences or errors.Instructions included:Each card ships with easy to follow instructions for perfect exposure and digital colors. The cards are guaranteed to perform perfectly for both film and digital.Exclusive n-Chrome coating for accuracy:The color patches are 100% coated (not screen printed) using DGK"s n-Chrome process, allowing for a much higher level of color density, luminance, and accuracy, while eliminating metamerism. This card is accurate to within 1%. With DGK Color Tools, you can be assured of perfect digital colors every time(tm).What"s in the package:Set of 3 cards, easy to follow instructions. Each card measures 8" x 10" or 192 by 240 millimeters. Designed in Boston, Massachusetts and made in USA: