Epson 2450 Startup Manual page 16

2. If the reflective document mat is not attached, you need to
attach it. Hold the top of the document mat and slide it down
gently along the integrated TPU.
Note:
When scanning reflective documents, make sure the reflective
document mat is attached. Otherwise images cannot be scanned as
expected.
3. Adjust both bottom corners of the reflective document mat to
the position fittings of the integrated TPU and then insert the
reflective document mat in the top and bottom position
fittings of the integrated TPU.
2-4
Scanning Basics