White Backing side

According to ISO:13655, white backing should have a diffuse-reflecting surface.

Typical ChromaChecker QC batch production measurement:

1. Opacity 100% (99,3% single page) [expected value >99%}]
2. FLuorescence = 0,0 [expected 0,0]
3. L*= 94,6  [requirement: L* shall not exceed 97], a*=-0,94    b*= 1,34 
4. C*=1,64  [requirement - shall not be larger then 3.00], h*=125,1 
5. Reflectance for given wavelength shall bein given by ISO13655 range 380-730nm:
   
   0,1190 0,2258 0,4528
   0,6727 0,7738 0,8069 0,8224 0,8345 0,8453 0,8530 0,8582 0,8613 0,8619
   0,8611 0,8603 0,8570 0,8538 0,8499 0,8444 0,8461 0,8470 0,8474 0,8467
   0,8472 0,8469 0,8481 0,8515 0,8555 0,8584 0,8627 0,8668 0,8688 0,8733
   0,8765 0,8767

Black Backing side

According to ISO:5-4 black banking should have a diffuse-reflecting surface.

Typical ChromaChecker QC batch production measurement:

1. Average Density = 1,44 [have to be between 1.30 – 1.70]
2. Density Range = 3,9 [expected value shall be less than 5]