Table 1.

Humidity sensing performance of different sensor devices fabricated on paper substrate.

Reference	Year	Sensing Material	Minimum RH (%)	Response/Recovery time
[35]	2011	Polypyrrole	40	418 s/418 s
[36]	2012	Carbonnanotube	20	6 s/120 s
[37]	2014	Aluminumoxide	25	/
[38]	2015	PVA	50	/
[18]	2015	Paper	30	4 min/6 min
This work	2016	Porouspaper	20	1 min/2–10 min
This work	2016	Smooth paper	40	10 min/8 min