How to supply Spot UV files

Tom Williams
by Tom Williams 2 months ago
 

Certain products have an option to add a Spot UV clear varnish shape onto the areas that you mark with a special finishing swatch. This swatch is available in our templates, please ask for a copy before starting your design.

How to supply your Spot UV elements

All of our InDesign templates include specific colour swatches for all finishing options or use the instructions below to set up the 'SPOT-UV' spot colour yourself:

  • Create a New Colour Swatch in InDesign.
  • Name the swatch SPOT-UV
  • Set Colour Type to Spot
  • Set Colour Mode to CMYK
  • Colour Make-up is 2% Cyan, 8% Magenta and 82% Yellow
  • Set swatch to Overprint (Window > Output > Attributes)

Alternatively, supply your Spot UV elements filled in 100% K (Black) on page 3 of your PDF and we will adjust the file for you.

How to add the Spot UV to your artwork

  1. Place Spot-UV elements above your artwork using the special Spot-UV spot colour swatch. This swatch must remain as a spot colour and must not be adjusted in any way.

  2. Set the Spot-UV elements to Overprint from within your design application.

  3. Keep creases and cuts at least 2 mm away from Spot-UV elements.

  4. Only use Spot-UV elements on the front pages of your artwork, unless you're making artwork for a Spot UV Duplex (double sided Spot UV) product.

Limitations: Getting the most from Spot UV

Design with a little tolerance for mis-registration

The UV varnish is applied using a screen printing process, and registration with print can vary by ±2 mm. This means you should expect the Spot UV element to move around the page by up to ±2 mm.

If you are aiming to cover a printed shape having a hard edge, then the Spot UV shape should overlap the printed edge by 2 mm to allow for any inherent variations in registration. Likewise, block shapes meeting the edge should be treated like backgrounds: bleed them to the very edge of the document page, and respect the Quiet Zone.

Don't try to align fine detail

Spot UV is not suited to alignment with fine detail, such as small type, or shapes with thin lines.

Our rule of thumb:

  • avoid positive lines thinner than 1 mm, and
  • avoid reversed-out lines thinner than 2 mm.

You’ll get best results when you don’t try to match the Spot UV to printed objects, and instead treat it as a design element in its own right.

Seperate Spot UV elements should have a minimum spacing of 2mm. Placing elements too close to each other will result in them becoming one shape and filling in.

Avoid large Spot UV areas over the edge

Avoid large solid areas of Spot UV bleeding to the edge as chipping and flaking may occur once the job has been guillotined or die-cut.

Vectors only for Spot UV

Spot UV elements must be supplied in vector format; any text shapes to be spot-varnished must be converted to paths/outlines.

Check the minimum thickness on text elements

Remember to:

  • avoid positive lines thinner than 1 mm, and
  • avoid reversed-out lines thinner than 2 mm.

That includes the counters, stroke width and serifs on fonts.

Solid varnish only; no tints

Spot UV cannot be specified as a gradient or tint, i.e. a changing tint from 100% to 0% over an area of artwork.

Samples

We have produced some printed samples that demonstrate how to use Spot UV, ask us for your free copies.

Quick File Check

After following the recommendations above check the following:

SPOT-UV artwork in on the topmost layer:

 SPOT-UV artwork is set to Overprint:

 SPOT-UV Swatch is set up correctly:

SPOT-UV Swatch shows in Adobe Acrobat's Output Preview:

SPOT-UV colour is transparent when Simulate Overpint is selected in Output Preview:

SPOT-UV colour is yellow when Simulate Overpint is NOT selected:

SPOT-UV colour is highlighted when Show Overprint is selected:

 

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