White background appears when printing a transparent PNG

Hi,

I have a question about importing and printing PNG files in EasySIGN.

I use a website to create logos for printing on garments. The files can be downloaded as PNG files for DTG printing. These PNG files have a transparent background, which allows me to place the designs on garment mock-ups, such as the blue hoodie I have included as an example.

I also use these files for digital transfer printing on dark or coloured garments with an OKI A3 white-toner printer. The printer first places white toner behind the image. The print is then heat-pressed onto a B-paper adhesive sheet before being transferred to the garment.

When I print the PNG file through the Forever RIP software, the image prints correctly. However, it is very small because the PNG file contains a large transparent margin around the design, and I cannot resize or crop the image in the RIP software.

I can also print directly to the OKI printer from EasySIGN, which works very well with EPS files. However, when I import one of these transparent PNG files into EasySIGN and print it, a large white square is printed around the image.

Could you please explain why this happens and how I can remove the white background or prevent it from being printed?

Thank you.

Kind regards,
Steve Diver