On a standard multi-needle machine, every colour is a separate needle, so a design is digitised as blocks of solid thread divided by trims. A Coloreel unit dyes one white thread on the way to the needle, which means colour can change gradually within a single run of stitches.
Getting a smooth gradient is therefore a digitising job as much as a colouring one. We build the stitch file, colour it in Coloreel Studio, set the colour transitions within the CCP (Color Change Precision) tolerance and review the preview before delivery.
Keep a standard multi-colour embroidery file for machines without a unit, and if your client's mark also runs on polos, a solid-colour logo file sits alongside the Coloreel version.
Colour needs stitch length to show. Lettering under about 5mm is left in flat colour, since a gradient across such a small letter can't be seen and makes it harder to read.