Materiali Energia Innovazione Rev. -- Execution Drafting Approval Page 4 of 9 _Eng. Mattia Santandrea, PhD_ _Eng. Mattia Santandrea, PhD_ _Eng. Luca Laghi_ |SQM_348_2020| Soci Fondatori Measures were perfomed using a ZL 310 Series High Quality Colorimeter (Zetalab s.r.l. Distribution), with 8/d geometry, measuring diameter equal to 8 mm. The values of the colorimetric coordinates were obtained as the average value of 3 measures on each cell (identified, as described above, with letters from A to E), performed through the CIELAB methodology (Ref. 2-d). The deviations ΔL*, Δa*, Δb* e ΔE* of the conditioned specimen are expressed with respect to the reference specimen and are shown in Table 1 (Type 3) and Table 2 (Type 4). Cell L* a* b* ΔL* Δa* Δb* ΔE* A – White 100% 69,08 -0,47 2,47 -3,38 0,12 2,31 4,10 B – Black 100% 37,49 2,57 2,59 -1,99 -0,10 1,27 2,25 C – Yellow 100% 83,66 3,71 61,32 -0,94 1,63 -0,37 1,93 D – Magenta 100% 57,61 58,58 -12,38 0,22 -1,40 1,53 2,17 E – Cyan 100% 74,38 -40,48 -20,92 -0,17 1,15 0,57 1,30 Table 1. Colorimetric coordinates and total variation between conditioned specimen and reference specimen – Type 3. Cell L* a* b* ΔL* Δa* Δb* ΔE* A – White 100% 62,27 -1,16 -0,49 -0,51 0,24 2,39 2,46 B – Black 100% 30,22 1,25 0,72 -0,61 -0,25 0,90 1,11 C – Yellow 100% 58,47 -3,19 36,49 -0,16 1,38 1,70 2,07 D – Magenta 100% 39,21 30,00 -8,17 -0,33 1,01 0,89 1,73 E – Cyan 100% 48,12 -20,18 -17,77 0,42 -1,74 0,96 2,11 Table 2. Colorimetric coordinates and total variation between conditioned specimen and reference specimen – Type 4.
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