Brother HL-1230 EN - Manual (Page 39)

CHAPTER 1 ABOUT THIS PRINTER
1-30
™ Guidelines for Printing on Both Sides of the
Paper
• It may cause wrinkling if the paper is too thin.
• If paper is curled, straighten it and then load it in the paper cassette.
• The paper type should be regular paper. Do not use bond paper.
• When loading paper in the paper cassette, first empty the cassette, and then insert
only the printed pages, with the printed side face up. (Do not add the printed pages
to the top of the unprinted paper stack.)
• If the paper is not feeding correctly, it is possible that the paper is curled. Remove
the paper and straighten it.