PrintVisual : custom FontFamilly doesn't work on some printers in a windows service with STA thread

Hi

I'm writing a windows service that act as a print spooler. Documents are printed in STA threads. My document is built as a Canvas that I print using the PrintDialog.PrintVisual function. It works fine, except on the two Epson printers we have(B501DN and T5000) where the custom fonts, embedded in the application, are replaced by standard fonts. I also have a WPF application, using the same printing library and threads than the windows service, and the printing is fine, even on Epson printers.

Any idea of what is going wrong ?

Thanks for your help