## 3 Results
### Fluid Absorption and Swelling Dimensional Changes
Moreover, the research refers to and applies to the specific case of painted panels, representing art objects that require impregnation treatments, and these panels were usually developed on the tangential section. \begin{table}
\begin{tabular}{c c c c c c} \hline \multirow{2}{*}{**Solvent**} & \multicolumn{4}{c}{**Swelling Difference between Initial Measurements and after Partial Immersion (15 min)**} \\ \cline{2-5}  & **Solar** & **Initial Tangent** & **Tangential Dimensions** & **Swelling** & **Dimensional** \\
**Sample Code** & **Dimensions** & **after Immersion** & **(mm)** & **(mm)** & **Variation (\(\mathbf{\Delta\alpha}\))** \\ \hline Water & I.FP ** & 130.88 (0.97) * & 136.26 (0.83) * & 5.38 & 4.11 \\  & II.P ** & 130.83 (0.72) * & 137.54 (0.97) * & 6.71 & 5.13 \\ White spirit & I.FP ** & 132.06 (0.67) * & 132.46 (0.67) * & 0.4 & 0.30 \\  & II.P ** & 132.84 (0.81) * & 132.89 (0.24) * & 0.05 & 0.04 \\ Acetone & I.FP ** & 130.04 (0.86) * & 138.95 (2.60) * & 8.91 & 6.85 \\  & II.P ** & 130.04 (0.86) * & 140.26 (0.89) * & 10.22 & 7.86 \\ \hline \end{tabular}  
* Standard deviation; ** FP wood without polychromy; *** P wood with polychromy.  
\end{table} 
Table 4: Dimensional changes in tangential average values with swelling. \begin{table}
\begin{tabular}{c c c c c} \hline \multirow{2}{*}{**Determinations**} & \multicolumn{4}{c}{**Solvent Used**} \\ \cline{2-5}  & **Water** & **White Spirit** & **Acetone** \\ \hline Sample code & 1P & 3P & 5P \\ Mass before the immersion & 125.32 & 134.11 & 130.48 \\ [g] & 284.87 & 308.74 & 309.24 \\  Mass after immersion & 176.84 & 210.245 & 224.7 \\ [g] & 301.72 & 312.33 & 335.42 \\ [cm\({}^{3}\)] & 51.52 & 76.135 & 94.22 \\  Solvent absorption & 51.52 & 97.61 & 119.27 \\ [cm\({}^{3}\)] & 17.17 & 32.54 & 39.76 \\ Solvent content/test tube, relative to initial volume and volume of solvent absorbed & 18.085 & 31.615 & 38.567 \\  Initial density & 0.439 & 0.434 & 0.421 \\ [g/cm\({}^{3}\)] & 0.586 & 0.673 & 0.669 \\ [g/cm\({}^{3}\)] & 0.415 & 0.429 & 0.389 \\ Increase in volume & 5.91 & 1.16 & 8.46 \\ [\%] & & & \\ \hline \end{tabular}  
* Standard deviation; ** FP wood without polychromy; *** P wood with polychromy.  
\end{table} 
Table 3: Means obtained from the determinations for the samples with a thickness of 27 mm. Acetone was observed to cause the most significant swelling of damaged wood. For example, in the case of samples without polychromy, the swelling was 65.61% greater in the case of immersion in acetone than in water. Regarding the polychromy samples, the swelling variation was 52.31% greater in the case of immersion in acetone compared to water. Comparing the white spirit solvent with acetone, it was observed that the swelling in acetone was 2127% higher for the samples without polychromy and 20,340% higher for the polychromy samples. The swelling ratio in the tangential direction was also determined for the thicker specimens. It was found that in these cases, acetone also produced the greatest swelling, but this was smaller compared to the sectioned pieces (12 mm thick). It can be concluded that, depending on the thickness of the wood and the time it remains under the action of the solvent, the swelling ratio is higher or lower.