How do I import a LAB image to Pages?

CIELAB colours are mostly used to edit pictures, but in some cases one might want to include an image that uses the LAB colour space to Pages.

Pages 3.0 usually imports Photoshop PSD files, but for some reason, it fails with PSD files using LAB colour space.

The solution is to save the image as TIFF. It maintains the colour space and it displays fine in Pages.

There is one restriction however: Instant Alpha does not work on imported LAB TIFF files. The solution is to add transparency in the TIFF file itself before import.