The HP Indigo Press, which we use for variable data printing and short run projects, has a special ink called Digital Matte. It's not technically a varnish, but it has the appearance of one.  It adds a nice touch to those special projects.  Please click on the link to access the How-to Guide.  http://www.redline.com.gr/pdf/matte.pdf

HP Indigo Digital Matte ink creates a differential gloss effect to add impact and sophistication to graphics and design.