# Material Composition Testing Related to Measurement Instrument Enclosure Design and Safety
## 3 Results  
### Tested Materials  
This section presents a detailed description of the tested materials and their combinations with additives. Table 1 lists the base materials and additives along with their corresponding reference numbers. To ensure clarity and avoid redundancy, the material reference numbers defined in Table 1 are used throughout Table 2 to represent the individual components of each sample. Table 2 presents the various material combinations prepared and tested. Each combination is identified by a mixture mark, which includes a consecutive number and the sample thickness (e.g., S1_1.5--sample one, 1.5 mm thick). We grouped materials based on their base composition, and some groups explored variations in thickness (see column two) and additive concentrations (see column three). Following the standard testing procedure described in Section 2, we classified the samples into HB, HB40, and HB75 categories. All measurement results were gathered in a table with all relevant information for each tested sample. Figure 4 illustrates the burning test process (left--implementation of burner, middle--sample flaming, right--front of the flame reaching 100 mm mark). \begin{table}
\begin{tabular}{c c c} \hline \hline
**Basic Material Group** & \
\begin{tabular}{c} **Mixture Mark** \\ **(Sample No.\_Thickness)** \\ \end{tabular} &
\begin{tabular}{c} **Material Combination** \\ **(Base Material + Additive(s))** \\ \end{tabular} \\ \hline \multirow{1}{*}{1} & S1\_1.5 & 81001531 \\  & S1\_3 & 81001531 \\  & S2\_1.5 & 81001531 + 81001532—4\% \\  & S2\_3 & 81001531 + 81001532—4\% \\  & S3\_1.5 & 81001531 + 81000577—2\% \\  & S3\_3 & 81001531 + 81000577—2\% \\  & S4\_1.5 & 81001531 + 81000577—2\% + 81001532—4\% \\  & S4\_3 & 81001531 + 81000577—2\% + 81001532—4\% \\  & S5\_1.5 & 81001531 + 81001483—2\% \\  & S5\_3 & 81001531 + 81001483—2\% \\ \hline \multirow{1}{*}{2} & S6\_1.5 & 81001295 \\  & S6\_3 & 81001295 \\  & S7\_1.5 & 81001295 \\  & S7\_3 & 81001295 \\ \hline \multirow{1}{*}{3} & S8\_1.5 & 81001482 \\  & S8\_3 & 81001482 \\ \cline{1-1}  & S9\_1.5 & 81001482 \\ \cline{1-1}  & S9\_3 & 81001482 + 81001483—2\% \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Material combinations. \begin{table}
\begin{tabular}{c c} \hline \hline
**Ref. No.** & **Material (Provided by Metrel-SLO, Slovenia)** \\ \hline \multirow{10}{*}{1} & 81001531 & ABS Terluran GP 22 \\  & 81001295 & ABS 100-x01 natur \\  & 81001482 & PC Makrolon 6557 \\  & 81001443 & ABS VAMBSA0 0023 \\  & 81002009 & TPE Megol I A 65 SV/P \\  & 81001810 & TPU Elastollane S 90 A 15000 \\  & 81000936 & PA6 Bergamid B 70 UF dark grey VN 5371 CF \\  & 81000935 & PA6 Bergamid B 70 UF blue VN 537o CF \\  & 10223024 & PA66 Ultramid A3K black \\  & 10238024 & PA66 Ultramid A3X2G5 black 23187 \\  & 81000264 & PA66 Ultramid A3k natur \\  & 81000863 & PC makrolon 2805 \\  & 81001893 & PC Lexan DMX 1435 \\  & 81000917 & PP Hostancom M2 U01 natur \\  & 81000918 & PP Novolen 2300 K natur \\  & 81000853 & ABS Novodur P2H AT grey (RAL 7012) \\  & 81000851 & Plastic PC Makrolon 2607 \\ \hline \multirow{10}{*}{1} & 81001532 & Pigment EUROCOLOR A92936 RAL 7021 4\% \\  & 81000577 & HOSTATRON-SYSTEM P1935 \\  & 81001483 & Pigment EUROCOLOR GRIGIO A90917 RAL 7001 2\% \\  & 81001119 & MASTERBACH 58-BU-20 blue for TPU \\  & 81001135 & MASTERBATCH 1031-BU-50 for polyamide, blue \\  & 81001134 & MASTERBATCH 1-RD-72 ZA POLIAMID for polyamide, red \\  & 81000267 & Green colour 232-GN-50 for POLIAMID \\  & 81001315 & MASTERBATCH UN2319-ORANGE \\  & 81000916 & MASTERBATCH 77-GY-50 grey PE/PP \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Identification of materials and additives.