Table 1

Comparison of mean duration of exposure between work days and weeks

Week	Day	Time work day	Time without exposure	Time with exposure	Time with exposure during				Time exposed to
Week	Day	Time work day	Time without exposure	Time with exposure	Step 1	Step 2	Step 3	Step 4	Light colours	Middle colours	Dark colours
Week 1	1	9:54	8:08	1:46	0:08	0:33	0:21	0:42	0:41	0:59	0:04
	2	10:04	8:18	1:46	0:08	0:38	0:20	0:37	0:46	0:52	0:06
	3	10:27	8:42	1:45	0:05	0:26	0:21	0:50	0:43	0:54	0:06
	1–3*	10:08	8:22	1:45	0:07	0:32	0:20	0:43	0:43	0:55	0:05
Week 2	1	10:04	8:12	1:52	0:07	0:33	0:24	0:46	0:56	0:47	0:08
	2	10:06	7:40	2:26	0:10	0:51	0:28	0:54	0:56	1:20	0:09
	3	10:16	8:15	2:01	0:08	0:34	0:21	0:56	0:42	1:15	0:02
	1–3*	10:08	8:02	2:06	0:08	0:39	0:24	0:52	0:51	1:07	0:06