Choose Reduce Paper Curl mode in the printer driver.
[Windows PCL printer Driver]
1) Click Advanced tab and then Other Print Options... button.
2) Click Improve Print Output and then select Reduce Paper Curl.
[Windows PS driver]
1) Click Advanced... button.
2) Select Reduce Paper Curl from Improve Print Output option.
[Macintosh driver]
1) From Print Settings, click Advanced and then click Improve Print Output....to select Reduce Paper Curl.