Except for silkscreen and pad printing, files needs to be organized in CMYK colour method. Remember the fact that if the set up is Erroneous, colours around the concluded item might vary from your file you despatched. Here's the way to set your artwork to CMYK colour mode in Adobe https://socialfactories.com/story2765465/flyer-printing-in-choa-chu-kang-things-to-know-before-you-buy