The Step Of Making Patch
Before the advent of computer technology, patches were made by hand. The general process, however, remains the same today.
First, a fabric backing is cut to shape.
To prevent fraying, the edges of the backing are heat-sealed.
Then, the thread is stitched into place. Some designs incorporate the backing as the background of the patch, while others completely cover the backing with stitches.
To finish the patch, iron-on adhesive may be applied to the reverse a step that was not originally done.
For big size need more time to digitize it then use DST file to embroidery it, also the embroidery time need long.