The objective of this study is to demonstrate the impact on SE performance when using different material than filter paper as a possible substrate. NIST proposed to perform these tests on a thin metal sheet (0,2mm) with 1 Layer of filter paper. As the ISO 12863 method allows using an alternative substrate, all ASTM tests have been conducted on Whatman No.2- and LIPCan filter papers. NIST proposed to use a metal sheet of type “AISI 302” with one layer of substrate paper. Two different cigarette / test pieces have been chosen for this study. To see if this proposal would be in contradiction with the aims of the regulators, we also included an old design cigarette without any FSC technology on the cigarette paper. The regulators consider the old design cigarettes as dangerous in relation to fires caused by these cigarettes. When the proposed metal plate is used for testing, the results should be compared and be in line with results from existing test methods with ten layers of substrate paper. The conclusion of this internal study would show if this effect can be compared to the actual oxygen transfer through the filter paper. Does a metal plate really match the results from tests with substrate paper?