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Digital foiling is partly a printing process and that means we cannot digitally foil on top of other printed elements unless you use one of the three methods below.

METHOD 1 - Use celloglaze
By applying celloglaze over other printed elements we can essentially start again and our foil can now be put down over the top of the print without issue. This does however cover up the chosen paper so you will not be able to feel any texture or uncoated finish.
Example 1 shows you how your final piece may look using this method

METHOD 2 - Leave clearance between foil and printed elements
If you don't want to celloglaze then you need to build a small gap into your artwork between the printed elements of your art and the foiled element. As the foiling is a second pass through our printer there is always some movement. In order to allow for this we recommend as large a gap as you can live with in your artwork. We suggest a minimum of 2mm but larger will help hide this small movement.
Example 2 shows you how your final piece may look using this method

METHOD 3 - Build a trap into your CMYK layer
The final option is quite tricky and won't suit all artworks and you do need to consider how it could affect your final printed piece. It involves building a trap of about 1.5mm into your printed layer. This will help cover up most of the movement that could occur the printing and the digital foiling process. It does however mean though that we are purposely hoping to overprint the CMYK on top of the foil in order to not have a white gap showing. It would not be appropriate for very intricately foiled elements as the trap will mean that it will essentially flood tiny details and you will then not see as much foil as you had hoped for. 
Additionally, when you set the artwork up for this you must remember to set your foiled layer or CMYK to overprint so that they do not knock each other out. If you are using InDesign then this is now done by using the 'Effects Palette' and choosing 'Multiply' which will then allow CMYK, spot colours and layers to interact rather than overlaying each other and knocking each other out.
Example 3 shows you how your final piece may look using this method.

Learn more about digital foil.