So all RGB files must be converted to CMYK for printing.
If you supply RGB files we will convert them before proofing. Certain very bright colours on a backlit screen simply cannot be printed on a surface with standard CMYK inks. Those colours will look duller after we’ve converted them. You are more likely to notice this when you used a solid fluorescent colour as a background or fill.
Colour photographs usually don’t suffer from visible conversion issues
We can however, make your flags as bright as physically possible!
If your proof seems like a substantial step down in colour intensity from RGB to CMYK, please rest assured that your flags will look bright and colourful, in the context of printed fabrics.