Comparison of Material Surface Staining Following Exposure to Heated Tobacco and E-Vapour Aerosols Versus Cigarette Smoke

      Gomez Lueso, M.; Rodrigues Crespo, K.; Glabasnia, A.; Goujon-Ginglinger, C.; Kleinhans, S.; Mitova, M. I.; Lang, G.

      Conference date
      Oct 20, 2023
      Conference name
      CORESTA Smoke Science and Product Technology 2023

      Cigarette smoke deposition on indoor surfaces leads to discoloration, particularly for light coloured materials. The less complex aerosols emitted by heated tobacco products (HTPs) and e-vapor products (EVPs) contain ≥ 90 % water and aerosol formers and are therefore supposed to induce less staining than cigarette smoke. This study compared indoor material staining caused by cigarette smoke versus HTP and EVP aerosols in a test chamber based on a model of a standard residential setting. Four typical indoor materials (wallpaper, cotton fabric, placemats, and tablecloths) were exposed to cigarette smoke (200 puffs of Marlboro Gold® corresponding to 1 pack of cigarettes), HTP aerosol (240 puffs of IQOS Iluma® corresponding to 1 pack of HTP), or EVP aerosol (240 puffs of MESH® 2.0). Colour changes were assessed using the Commission Internationale de l’Eclairage L*a*b* colour space. The colour readings were performed on non-exposed samples, immediately after exposure, and after a 28-day aging period. The calculated colour changes were correlated with the visual perception of a standard observer (average person with normal colour perception). The results in freshly exposed materials showed that cigarette smoke caused the materials to turn darker and yellowish, while HTP and EVP aerosols induced minimal or no colour change. Aging only affected cotton fabric, which turned yellow, particularly when exposed to cigarette smoke. Overall, colour changes following HTP and EVP aerosol exposure were significantly lower (by at least 95 %) than those caused by cigarette smoke. An exception was the colour change of aged cotton fabric exposed to HTP aerosol, which had a reduction of 90 % compared to cigarette smoke. These results suggest that HTP and EVP aerosols are less likely to discolour indoor materials and corroborate previous findings indicating that these aerosols cause less tooth discoloration than cigarette smoke.