In Document Mode in Epson Scan 2, select the Advanced Settings tab, and then Image Option > Text Enhancement.
Select Document Mode as the Mode in Epson Scan 2. Scan using the settings for documents in Document Mode.
In Document Mode in Epson Scan 2, when Image Type on the Main Settings tab is set to Black & White, adjust Threshold on the Advanced Settings tab. When you increase the Threshold, the black color area becomes larger.
If the resolution is low, try increasing the resolution and then scanning.