Materials 2025 , 18 , 228
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Table 7. Basic characteristics and corresponding positions (ranks) of the products T15 and T17 obtained for the 4 considered assessment methods.
Number ofPlies
TSA Rank
SUB Rank
KES Rank
OPT Rank
Product ID Line
Thickness
Industrial
Low High
2 5
3
20 24
1
1
T15 T17
Commercial
27
29
29
From Table 7, the TSA method ranked both products very similarly as the KES and the OPT methods, with a value of 3 instead of a 1 for the product T15, and a value of 27 instead of a 29 for the product T17. For both cases, low differences of 2 and − 2were verified, meaning that these three methods are generally in agreement in the evaluation of these two products. Concerning the SUB method, a ranking of 20 and 24 were given to the products. The value of 24 given to the product T17, despite being a bit lower than the values obtained through the other three methods, makes complete sense and continues being in line with the other approaches. The product is still being evaluated as being soft, ranking a 24 out of a maximum of 29. However, for the product T15, the value of 20 that was given in the subjective evaluation differs greatly compared to the other given ranks. From the results obtained through the other three methods, and also by an analysis of the images shown throughout this work, there is nothing that indicates this product as having a softness rank of 20 out of a maximum of 29, clearly appearing to have been overestimated by the subjective panel. The last case study considers the product associated with the highest difference between the KES and OPT methods, as shown in Table 6. The 3D map that was obtained through the optical system for this product T20 is presented in Figure 9.
( a )
( b )
( c )
( d )
( e )
( f )
Figure 9. 3D map obtained for the tissue product T20: ( a ) top view of front side; ( b ) perspective view of front side; ( c ) lateral view of front side; ( d ) top view of back side; ( e ) perspective view of back side; and ( f ) lateral view of back side. From the 3D map created with the optical system, the embossing pattern of this product is very different from the previous two, shown in Figures 5 and 6. It can also be seen that this product is also very thick, with values of approximately 0.6 mm to 0.8 mm measured along the z direction. As for the appearance of the surfaces, the colormap
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