## 3 Results
### Artificial Ageing Protocol (AAP)
#### 3.1.1 Colorimetric Analysis
\begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Sample**} & \multicolumn{4}{c}{**Before AAP**} & \multicolumn{4}{c}{**After AAP**} & \multicolumn{4}{c}{**Comparative**} \\ \cline{2-13}  & \(\mathbf{L^{*}}\)**(D65)** & \(\mathbf{a^{*}}\)**(D65)** & \(\mathbf{b^{*}}\)**(D65)** & \(\mathbf{L^{*}}\)**(D65)** & \(\mathbf{a^{*}}\)**(D65)** & \(\mathbf{b^{*}}\)**(D65)** & \(\mathbf{\Delta\)E\({}^{*}}\)\({}_{Lab}\)** & **\%\(\Delta\)L*** & **\%\(\Delta\)C*** & **\%\(\Delta\)H*** & **total** \\ \hline P1 aCa(A) & 41.06 & \(-\)10.32 & \(-\)16.16 & 32.21 & \(-\)8.18 & \(-\)14.39 & 9.27 & 91.07 & 7.96 & 0.98 & 100 \\ \(\sigma\) & 0.83 & 0.60 & 0.38 & 2.28 & 0.71 & 0.91 & 2.11 & 5.79 & 6.64 & 1.25 & - \\ P1 aCa(B) & 67.61 & \(-\)4.37 & \(-\)20.78 & 64.78 & \(-\)7.31 & \(-\)14.59 & 7.42 & 14.63 & 43.96 & 41.41 & 100 \\ \(\sigma\) & 3.06 & 0.54 & 4.05 & 3.40 & 0.80 & 4.31 & 0.86 & 17.36 & 17.02 & 5.32 & - \\ P1 aCa(C) & 37.88 & 12.00 & 24.49 & 37.87 & 11.24 & 22.42 & 2.21 & 0.01 & 98.83 & 1.16 & 100 \\ \(\sigma\) & 3.71 & 1.19 & 4.95 & 3.70 & 0.93 & 3.81 & 3.31 & 26.71 & 32.46 & 25.97 & - \\ \hline P1 aGa(A) & 49.78 & \(-\)8.24 & \(-\)19.92 & 49.90 & \(-\)8.63 & \(-\)21.62 & 1.75 & 0.48 & 96.93 & 2.59 & 100 \\ \(\sigma\) & 3.04 & 0.63 & 1.17 & 1.75 & 0.95 & 1.23 & 1.80 & 36.14 & 35.02 & 4.10 & - \\ P1 aGa(B) & 53.88 & 4.25 & \(-\)44.60 & 52.66 & 3.35 & \(-\)43.67 & 1.77 & 46.90 & 32.18 & 20.92 & 100 \\ \(\sigma\) & 0.85 & 0.64 & 0.74 & 0.82 & 0.67 & 0.71 & 0.46 & 29.81 & 22.03 & 11.53 & - \\ P1 aGa(C) & 46.19 & 15.43 & 30.94 & 44.16 & 14.73 & 29.22 & 2.75 & 54.66 & 45.07 & 0.27 & 100 \\ \(\sigma\) & 0.79 & 0.49 & 1.13 & 1.77 & 0.92 & 1.63 & 1.48 & 25.10 & 23.76 & 2.02 & - \\ \hline P2 vCa(A) & 43.54 & 23.75 & 5.36 & 43.96 & 19.83 & 3.61 & 4.32 & 0.93 & 94.40 & 4.67 & 100 \\ \(\sigma\) & 6.15 & 12.34 & 13.11 & 6.51 & 12.79 & 13.20 & 3.06 & 25.33 & 36.52 & 31.80 & - \\ P2 vCa(B) & 67.03 & \(-\)1.99 & \(-\)17.49 & 64.65 & \(-\)4.10 & \(-\)13.36 & 5.21 & 20.85 & 48.41 & 30.74 & 100 \\ \(\sigma\) & 3.07 & 0.53 & 3.79 & 3.10 & 0.91 & 4.54 & 1.42 & 27.82 & 28.39 & 9.33 & - \\ P2 vCa(C) & 39.02 & 13.79 & 24.11 & 38.83 & 12.88 & 23.25 & 1.27 & 2.28 & 89.29 & 8.43 & 100 \\ \(\sigma\) & 3.20 & 1.54 & 4.67 & 4.21 & 1.50 & 3.93 & 1.89 & 33.60 & 34.75 & 5.85 & - \\ \hline P2 vGa(A) & 43.18 & 36.00 & 17.18 & 47.08 & 33.44 & 16.19 & 4.77 & 66.82 & 32.97 & 0.20 & 100 \\ \(\sigma\) & 2.08 & 2.27 & 1.94 & 4.82 & 3.72 & 2.45 & 5.14 & 24.63 & 20.97 & 8.91 & - \\ P2 vGa(B) & 53.78 & 5.35 & \(-\)45.50 & 51.55 & 3.32 & \(-\)41.46 & 5.04 & 19.65 & 70.06 & 10.29 & 100 \\ \(\sigma\) & 1.51 & 0.99 & 2.44 & 1.47 & 1.30 & 2.93 & 2.73 & 21.62 & 19.77 & 10.06 & - \\ P2 vGa(C) & 46.23 & 16.00 & 32.17 & 43.97 & 15.26 & 28.98 & 3.98 & 32.11 & 63.85 & 4.05 & 100 \\ \(\sigma\) & 0.73 & 0.35 & 0.71 & 1.45 & 1.04 & 2.07 & 2.47 & 13.30 & 15.54 & 11.67 & - \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Colorimetric measurements. in the intensity of the color, specifically a decrease in the intensity of the red component of the positive a-coordinate (\(a^{*}\)(D65)). In the case of Arabic gum-bonded vermidin, the changes are mainly due to changes in color clarity (%\(\Delta\)L*), as there is an increase in the L-coordinate, which shows that there is an increase in color clarity. Additionally, to a lesser extent, there is also a change in chroma (%\(\Delta\)C*) due to a decrease in the intensity of the red color, as was also the case with Arabic gum (Table 3). In the case of the azurite pigment mixed with Arabic gum, it has a stable behavior to ageing (\(\Delta\)E*\({}_{Lab}\) = 1.75), while mixed with animal glue, the polychromy is chromatically altered (\(\Delta\)E*\({}_{Lab}\) = 9.27). In the case of animal glue mixed with azurite (P1 aCa(A)), the changes are mainly due to changes in color clarity (%\(\Delta\)L*), as there is a decrease in the L-coordinate, which shows that there is a decrease in color clarity.