Volume 22.3

On the Cover
Testing an inkjet print to determine its coating. Inkjet papers often have special coatings that hold the colorants at the surface, resulting in a higher quality image. A spot test with a minute droplet of water, performed under a microscope, may help establish if the coating is a porous or polymer type. Porous coatings absorb water, while polymer coatings swell due to their high gelatin or polyvinylalcohol content. This distinction is useful in evaluating exhibition and storage conditions for these prints. Photo: Martin Jürgens.