Epson Stylus 1500 Reference Manual page 16

Media type
Standard paper
Transparency film
Labels
Continuous paper
If a document is smeared, set the thickness adjustment lever to
the + position (regardless of the paper type) and print it again.
To access the lever, open the printer cover; the lever is in the
right back corner, as shown in the following illustration.
Thickness
adjustment
lever
position Media type
0 Envelopes
0 Previously smeared
documents
0
0
Thickness
adjustment
lever
position
+
+
Paper Handling
1-3