Inside each packet two cards are included; one size 20x25cm and one size 10x12cm. According to the dimension of the scene both ones can be used when necessary.

The supporting cardboard is 2mm thick, it assures the card flatness to avoid reflections in consequence of unwilled curvings. Moreover the uncalibrated white side can come to be useful for a quick custom white setting.

Keep the Gray card carefully keeping it clean and avoiding scratches. When this will occur because of the use in time, its characteristics of reference will no long give the necessary trust and the initial data will be alterated.

The Gray Cards have been certificated by the Istituto Nazionale di Ottica di Arcetri, Firenze.

The calibration was made with top precision instruments, the indicated data were measured at various wave lengths and with different lightings.

read the certification

code GC004

code GC004-10 10 pcs pack