Digital BW, The Print

I'm still quite new the the whole process of EB6 with an Epson 1430.

I'm partly satisfied with the results. I made many test with images that I printed in a darkroom so I can compare. Up to now, I'm very close.

For each print, I added a 21 steps greyscale and for easier evaluation I made five bigger squares in PhotoShop that I filled with (0-0-0, 5-5-5 and so on) blacks; I added three squares (250-250-250,245-245-245 and 240-240-240).

On the print, the lighter squares are perfect but the black ones are mushy and difficult to evaluate. Seems that from 0-0-0 to 25-25-25 I get the same black or almost.

Is there a way, with the Epson driver (I'm on Red River Polar Matte paper) to compensate so I can have a little bit more separation in the blacks?

I know that this is probably incomplete or not clear but if it is asked, I'll try my best to feed in the missing info.

Many thanks