Epson LQ-1050 User Manual page 159

Note: For best results, use typewriter quality paper. If you
plan to use paper with a glossy or textured surface, test it
before using it to print documents. Do not use multi-part
forms, carbon paper, or labels in the cut sheet feeder.
5. Insert the stack of paper between the paper guides, aligning it
with the left edge of the guide. Then adjust the right paper guide
until the paper is held firmly, but not so tightly that it causes the
paper to buckle. Make sure the paper can move up and down
freely.
5-10 Using the Printer Options