## 3 Results  
On the basis of measurements, the following amplitude parameters were calculated (according to ISO 4287:1999, 4288, 3274, and later to ISO 21920-1:3 [18; 19; 20; 21]):  
Rz--maximum peak-to-valley height of the profile within a sampling length.  
Rt--maximum peak-to-valley height of the profile in the evaluation length.  
Ra--arithmetic mean of the absolute departures of the roughness profile from the mean line.  
After all measurements were taken, the mean and extreme values were determined, as well as the deviation and standard error for each surface, which are summarized in Table 1.  
Examples of the obtained mean profiles are shown in Figure 4. The scale for the S_CA + I (fourth from top) sample was increased to 1 \(\upmu\)m to better show the surface irregularities.  
Figure 4: Mean profiles of all samples: (from **top** to **bottom**) S_W_S_D, S_CA, S_CA + I, S_CA + A.  
After compilation, the largest differences in the mean results of individual parameters between all samples are presented as follows:  
* For the Rz parameter, the largest difference between the surfaces is 0.45 \(\upmu\)m;
* For the Rt parameter, the largest difference between the surfaces is 0.81 \(\upmu\)m;
* For the Ra parameter, the largest difference between the surfaces is 0.058 \(\upmu\)m.  
All of the above differences occurred between the S_CA and S_CA + I samples (Table 1). Since the Ra parameter is an arithmetic mean value, it shows the least susceptibility to the outliers and, as such, will be the least relevant for analysis.  
The value of the Rz (Figure 5) parameter almost twinned for samples S_D and S_CA + A (sample with evaporated coolant liquid phase and sample after blowing and bathing in acetone). The outliers are the already mentioned samples after blowing (S_CA) and after blowing and bathing in isopropyl alcohol (S_CA + I).  
For the total profile height Rt (Figure 6 top), very similar values were obtained for the sample straight from the machine and for the sample after evaporation of the liquid part (S_W and S_D, respectively). Once again, extreme values were obtained for samples after blowing and bathing in isopropyl alcohol. The arithmetic mean deviation from the mean line inside the elementary section (Ra shown in Figure 6 bottom) confirms the differences in the extremes, but the differences are too small to clearly determine the nature of the differences. In further discussions, Ra will be omitted.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline
**Sample** & **Parameter** & **Max** & **Min** & **Mean** & **Std Dev** & **Std Err** \\ \hline \multirow{4}{*}{S\_W} & Rz & 2.830 & 2.050 & 2.320 & 0.203 & 0.0454 \\  & Rt & 3.950 & 2.520 & 3.390 & 0.409 & 0.0915 \\  & Ra & 0.290 & 0.198 & 0.247 & 0.022 & 0.0049 \\  & Rz & 2.780 & 2.280 & 2.510 & 0.162 & 0.0362 \\  & Rt & 4.250 & 2.730 & 3.400 & 0.363 & 0.0812 \\  & Ra & 0.303 & 0.225 & 0.260 & 0.019 & 0.0043 \\  & Rz & 2.980 & 2.290 & 2.610 & 0.198 & 0.0443 \\  & Rt & 4.900 & 2.760 & 3.790 & 0.569 & 0.1272 \\  & Ra & 0.315 & 0.249 & 0.287 & 0.022 & 0.0049 \\  & Rz & 2.430 & 1.920 & 2.160 & 0.135 & 0.0302 \\ S\_CA + I & Rt & 3.630 & 2.360 & 2.980 & 0.322 & 0.0720 \\  & Ra & 0.265 & 0.203 & 0.229 & 0.016 & 0.0035 \\  & Rz & 3.110 & 2.120 & 2.500 & 0.224 & 0.0501 \\ S\_CA + A & Rt & 4.810 & 2.980 & 3.550 & 0.435 & 0.0973 \\  & Ra & 0.288 & 0.225 & 0.257 & 0.018 & 0.0040 \\ \hline \end{tabular}
\end{table}
Table 1: Obtained and calculated results.  
Figure 5: Rz parameter mean values.  
In order to better illustrate the spread of the results, in Figure 7, the average values are compared against the maximum and minimum values.  
Figure 6: Rt (**top**) and Ra (**bottom**) parameter mean values.  
Figure 7: Rz (**top**) and Rt (**bottom**) parameters mean values compared to outliers.