# Spectral Raman Database of Modern Acrylic Paints at 532 nm and 633 nm Laser Excitation Wavelengths
## 3 Results and Discussion
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Pigment** & **Substrates** & **Laser** & **Observed Raman Bands** \\ \hline \multirow{10}{*}{PBL} & & & 443 s, 593 s, 678 s, 718 vw, 745 m, 779 vw, 830 m, 846 m (sh), 869 vw, 952 m, 977 vw, \\  & & & 1007 m, 1037 m, 1081 w, 1107 w, 1143 s, 1195 m, 1215 m (sh), 1282 w (sh), 1307 m (sh), \\  & & G & 1342 s, 1389 w, 1412 w, 1430 w, 1452 s, 1471 w (sh), 1484 m (sh), 1508 w (sh), 1530 vs, 1592 w, 1608 w, 1704 vw, 1787 vw, 1891 vw, 2024 vw, 2091 vw, 2162 vw, 2184 vw, 2211 vw, 2278 vw, 2278 vw, 2386 vw, 2427 vw, 2487 vw, 2598 vw, 2676 vw, 2794 vw, 2872 w, 2938 w (sh), \\  & w & 2981 vw (sh), 3058 w \\ \cline{2-3}  & & & 421 w, 445 w (sh) br, 483 m, 491 vw (sh), 510 wv, 547 vw, 594 m, 642 w, 681 vs, 707 vw (sh), 741 vw (sh), 747 vs, 777 m, 818 w, 832 w, 850 w, 955 m, 981 m, 1008 vw, 1040 vw, 1085 m, 1100 vw, 1134 w (sh), 1145 m, 1215 v, 1283 m, 1294 w, 1306 w, 1342 s, 1362 vw, 1452 s, 1531 vs, 1540 vs (sh), 1611 w, 1815 v, 2033 w, 2095 w, 2213 w, 2280 m, 2679 m, 2877 m, 2895 w, 3062 m \\ \cline{2-3}  & & & 440 s, 588 s, 603 s (sh), 675 s, 714 w, 741 m, 773 w, 826 m, 842 m (sh), 949 m, 974 vw, 1004 m, 1033 m, 1079 w, 1105 w, 1128 w (sh), 1140 s, 1191 m, 1213 m, 1280 vw (sh), 1304 w, 1340 s, 1387 vw, 1410 vw, 1426 vw, 1450 s, 1468 w, 1482 w, 1505 w, 1527 vs, 1592 w, 1609 w (sh), 2123 vw, 2211 vw, 2277 vw, 2489 vw, 2596 vw, 2676 w, 2794 vw, 2873 w, 2981 vw, 3057 w \\ \cline{2-3}  & & & 419 vw, 482 m, 510 vw, 546 vw, 594 m, 641 w, 680 vs, 707 vw (sh), 747 vs, 776 m, 818 vw, 832 w, 848 vw, 955 m, 980 m, 1009 vw, 1038 vw, 1083 w, 1109 vw, 1130 w (sh), 1142 m, 1213 vs, 1341 s, 1451 s, 1529 v, 1538 vs (sh), 1611 w, 1815 v, 2020 w, 2091 vw, 2211 vw, 2278 m, 2677 w, 2878 m, 2984 w, 3063 m \\ \hline \multirow{2}{*}{VB} & w & R & 693 m, 1002 m, 1317 m, 1599 m \\ \cline{2-3}  & g & R & 462 m, 696 m, 1004 m, 1317 m, 1598 m \\ \hline \multirow{10}{*}{PGL} & & & 506 m, 613 w, 639 vw, 681 vs, 737 vw, 771 w, 815 m, 975 m, 998 m, 1027 vw, 1081 s, \\  & & G & 1134 vw, 1187 m (sh), 1197 s, 1209 m (sh), 1281 vs, 1338 s (sh), 1387 s, 1444 m, 1481 s (sh), 1505 vs (sh), 1538 vs, 1560 m (sh), 1605 w, 1969 vw, 2188 vw, 220 w, 2370 vw, 2423 vw, \\  & & & 2590 vw, 2651 vw, 2821 w, 2871 w, 2943 w, 3041 w (sh), 3069 w \\ \cline{2-3}  & & & 507 w, 545 vw, 594 vw, 641 m, 683 v, 706 m (sh), 739 s, 775 s, 816 m, 958 w (sh), 979 s, 1083 s, 1214 v, 1282 s, 1292 s (sh), 1317 vw, 1338 s, 1360 vw, 1389 m, 1395 w (sh), 1445 s, 1481 vw, 1506 m (sh), 1538 vs, 1899 vw, 225 vw, 2270 vw, 2270 vw, 2314 vw, 2428 vw, 2831 vw, 2879 vw, 3079 vw \\ \cline{2-3}  & & & 504 m, 681 vs, 772 w, 814 m, 978 m, 997 w (sh), 1034 vw, 1083 s, 1197 m, 1281 vs, 1338 s, 1388 s, 1445 m, 1482 m (sh), 1505 vs, 1539 vs, 1562 m (sh), 3076 w \\ \cline{2-3}  & & & 508 w, 545 w, 595 vw, 641 m, 684 vs, 706 m (sh), 739 s, 776 s, 817 m, 959 w (sh), 980 s, \\  & R & 1082 s, 1212 vs, 1280 s, 1291 s (sh), 1316 vw, 1337 s, 1360 vw, 1388 m, 1394 w (sh), 1445 s, 1481 vw, 1505 m (sh), 1538 vs, 1899 vw, 2224 vw, 2280 vw, 2315 vw, 2428 vw, 2831 vw, 2880 vw, 3079 vw \\ \hline \multirow{6}{*}{PGL} & & & 504 m, 681 vs, 772 w, 814 m, 978 m, 997 w (sh), 1034 vw, 1083 s, 1197 m, 1281 vs, 1338 s, 1388 s, 1445 m, 1482 m (sh), 1505 vs, 1539 vs, 1562 m (sh), 3076 w \\ \cline{1-1} \cline{2-3}  & & & 508 w, 545 w, 595 vw, 641 m, 684 vs, 706 m (sh), 739 s, 876 s, 817 m, 959 w (sh), 980 s, \\ \cline{1-1} \cline{2-3}  & R & 1082 s, 1212 vs, 1280 s, 1291 s (sh), 1316 vw, 1337 s,1360 vw, 1388 m, 1394 w (sh), 1445 s, 1481 vw, 1505 m (sh), 1538 vs, 1899 vw, 2224 vw, 2280 vw, 2315 vw, 2428 vw, 2831 vw, \\ \cline{1-1} \cline{2-3}  & & & 2880 vw, 3079 vw \\ \hline \hline \end{tabular}
\end{table} 
Table 3: _Cont._but are weak or absent at lower energy (633 nm), and vice versa. The observed spectral variations depend on the absorption profile of the material. A detailed explanation of the Raman resonance effect can be found elsewhere [26; 27; 28].