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Qpcard is a self-adhesive multi-function reference card for digital images shot by digital cameras or scanned from negatives or slides (shown on the right over the model's eye). The 18% gray field is used for gray balance and exposure adjusment. The white and black fields are used for white-point and black-point settings. The card also has a millimeter scale for size reference.
The size of the card is 142 x 40 mm and it is delivered in pads weighing 35grams with 15 cards in each pad. Each pad is packed in a resealable light-proof foil package.
For more information please see www.qpcard.com.