How does white ink work?
On our large format flatbed we're able to print white ink – either as a spot colour in certain places (like on a darker print substrate), behind images to increase their contrast on a darker substrate (like wood), or as a combination of the two.
You’ll need to specify a spot colour, call it “White” (with a capital W), and use it as a fill or stroke like you would any other colour. We can also flood it across an entire image if you like.
If you want the white to exist in the same location as CMYK inks, the top-most layer needs to be set to "overprint" so that it prints on top of the other colours, instead of hiding them altogether.
White ink isn’t available for laser printing, but can be used for large format rigid prints.
In Adobe InDesign or Illustrator create a new colour swatch and name it White and designate it as a spot colour (the name is case-sensitive).
To print White ink under or over other CMYK layers, set any layers that overlap others to ‘overprint’ so they won’t knock out anything below.
In InDesign: Window > Output > Attributes > Overprint fill and/or stroke.
In Illustrator: Window > Attributes > Overprint fill and/or stroke.
In Photoshop: Go to channels, create a new channel, name it Clear or White, and set it to spot colour. This can be tricky, but we're happy to help if you get lost.
Feel free to talk to us if you’re having any issues, or are unsure of what any of this means!