Analytics Software

Dear Experts,
In my custom check print template, some of the numbers in the check number, rotuing and account number are appearing too thin when I'm printing the check. So, the bank is rejecting the checks.

I tried to make the MICR font bold but it prints the same way it when it was not bold. I'm using the GnuMICR font on my check template.

I would like to know if it is possible to make the MICR font bold? Also would greatly appreciate recommendations on the best MICR font to use?

Thanks in advance.