| Brand | Sample no. | Origin country | Colour | Pb |
| 1 | S1 | China | Black | 4 ± 0.01 |
| S2 | Blue | 10.4 ± 0.01 | ||
| S3 | Brown | 16.6 ± 0.04 | ||
| 2 | S4 | Saudi Arabia | Black | 7.6 ± 0.11 |
| S5 | Blue | ND | ||
| S6 | Brown | 1.2 ± 0.04 | ||
| 3 | S7 | China | Black | 9.2 ± 0.07 |
| S8 | Blue | ND | ||
| S9 | Brown | 2.8 ± 0.02 | ||
| 4 | S10 | Italy | Black | 3.8 ± 0.05 |
| S11 | Canada | Blue | 7.8 ± 0.00 | |
| S12 | U.S.A | Brown | 4.6 ± 0.03 |