The Test trump took advantage of Tasmania gifting him three chances before he reached 50 to counter what had been a disciplined attack from the Tigers bowlers.
His 167 from 230 balls elevated the Bulls into a strong position at 6-331 in reply to Tasmania's 250 at stumps, with the maroons looking to extend the 81-run lead when they resume.
A desire to improve his batting mid-innings saw Labuschagne head to the nets at the lunch break to try out a lighter weight bat than the one he had been using. Seemingly satisfied with his switch, he led the way for Queensland as he and Matt Renshaw (48) took the upper hand.
His century included 17 boundaries and two sixes and was his highest Shield score. It was Labuschagne’s 14th first-class century, and first in the Sheffield Shield since March 2018, around six months before his Test debut.
His previous highest individual score in the Sheffield Shield was 134, which he achieved against New South Wales in 2018.
His run-scoring spike, which included five hundreds for Glamorgan in the last northern summer and his flowing run-scoring for Australia, has now been matched by his early Bulls return.
Young opener Bryce Street kept his cool in a steadying half century at the top of the order, that saw him test the patience of the Tasmanian attack as he sapped their early innings fire.