Table 3. Effect of handling surface area on estimated intake when concentrations in thermal paper are low.

	K = 1072	K = 1838	K = 21522
AF = 2.3%	85.9 ± 1.81	147.3 ± 3.11	1724.3 ± 36.4
AF = 8.6%	321.1 ± 6.78	550.6 ± 11.62	6447.2 ± 136.0
AF = 27%	1008.2 ± 21.3	1728.6 ± 36.47	20241.2 ± 427.1

Estimated exposure calculated using Eq 1, a single handling event, maximum handling time of 240 seconds and thermal paper concentrations of 211 μg/g, the geometric mean reported previously by Liao & Kannan [25]. Surface area was calculated using the values described in Fig 3B.