Error Message from Offset Printers

We just received an error message from our printers in China having issues with the Raster FontSelf font we created in Photoshop. The Raster Icon Font is coming out MUCH LIGHTER than it appears on screen. On the left is the pre-press PDF vs on the right the original exported PDF.

Any help here would be amazing!

Matt

Looks like an RGB to CMYK conversion issue, but unfortunately neither CMYK nor color profiles are supported in OpenType-SVG fonts (see PDF export issues with color fonts | Fontself Maker Help Center), so not sure if there’s a way to adjust this in any software.

Thanks Franz! Does this also apply to RASTER fonts as well?