Ink colours will appear differently over the coloured stocks, compared to how they appear when printed on a white paper.
The amount of colour shift will vary depending on the colours used in your design and the colour of the paper you choose. Stocks with more intense or deeper shades will have a more obvious affect on the printed colours, and are therefore recommended to print with black ink, or with a white ink as an underlay for opaque lighter colours or for a solid white print.
Printed on Colorplan 'Racing Green' with no White Ink
Printed on Colorplan 'Racing Green' with White Ink underlay
If you are planning to print a full colour CMYK design on one of the coloured stocks, it is important to note that we may recommend white ink as an underlay.
Related articles: How to setup white ink printing with spot colors in Adobe Illustrator