Materiali Energia Innovazione Rev. -- Execution Drafting Approval Page 3 of 9 _Eng. Mattia Santandrea, PhD_ _Eng. Mattia Santandrea, PhD_ _Eng. Luca Laghi_ |SQM_348_2020| Soci Fondatori Figure 1. Reference specimens: (a) Type 3; (b) Type 4. 4 Test Execution and Description of the Results 4.1 Experimental evaluation of the colorimetric coordinates and ΔE CIELAB The test aims to define, for each type of specimen, the colorimetric coordinates L*, a*, b* and the total variation ΔE* between the reference specimen and the conditioned specimen. In particular, the comparison was performed in the columns with the color equal to 100%. The White 100%, Black 100%, Yellow 100%, Magenta 100%, and Cyan 100% cells were indicated, respectively, with letters A, B, C, D ed E (Figure 2). Figure 2. Column considered for the execution of the measures and identification of the cells. a b NOT CONDITIONED CONDITIONED
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