Brother DCP-9055CDN - Manual (Page 134)

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1 For labels, we recommend removing printed pages from the output paper tray immediately after they exit the machine
to avoid the possibility of smudging.
2 60 to 105 gsm for duplex print.
Duplex
Printing  Manual Duplex: Yes
 Automatic Duplex: Yes
 Paper Size
(Automatic Duplex): A4
 Paper Weight
(Automatic Duplex): 60 to 105 gsm
 Paper Type
(Automatic Duplex): Plain paper, Thin paper, Recycled paper or
Glossy paper