Wednesday Experts Post: Acrylic Gel as Thermoplastic Adhesive


Many artists know acrylic mediums make great adhesives, but not everyone knows they can be used with heat! We’ve previously shown how to make a basic canvas panel with wet adhesion (, but here’s a new twist! Read more at the Utrecht Facebook page.

Classical Technique: The Frottis

Madame_Récamier_by_Jacques-Louis_DavidThis unfinished painting, “Madame Récamier” by Jacques-Louis David exhibits the initial rubbed-in image called the frottis.

The frotté (“rubbed”) technique involves a thin layer of oil color diluted with thinner, applied with vigorous brush work. While the palette is largely composed of earth colors, the image is actually worked up in a relatively full palette even at this early stage. This approach establishes a lean (low oil), smooth underpainting that supports subsequent layering.

Bright (short flat) natural bristle brushes work well for For the frotté technique (though David’s work precedes the development of metal ferrule flat brushes).–Brights-MP28322-i1005897.utrecht

Use of the term “Archival” in the Art Materials Industry

The term “archival” has become one of the most frequently used buzz words in the art materials industry. The word is now firmly established in the studio artist’s lexicon; hundreds of products from adhesives to albums are sold as such, and artists frequently inquire whether their materials are “archival”. The issue of permanence in art materials is complex, however, and no single word is adequate to guarantee every application, combination or display environment.

In recommending products to artists, it’s important to clearly define our terms. When most individuals say “archival”, usually they really mean “durable to the standards of permanent art” (or, hopefully something like that). Strictly speaking, however, the term means “of or pertaining to archives or valuable records”. As it applies to materials and supplies, “archival” means something suitable for long-term contact with important objects, safe and stable to museum or library standards.

Many products used in the treatment and storage of valuable documents have been adapted for use in studio art. Just because a paper, adhesive or other material is recommended for archival use, however, does not automatically mean it’s suitable for making art. In order to give reliable, accurate advice to art supply shoppers, it’s important to understand what “archival” does (and does not) imply:

  • Archival inks and pens are safe for contact with paper (won’t contribute to deterioration), but may not necessarily be lightfast to the standards of permanent art. Ink which retains color in dark storage may not perform as well under gallery/interior display conditions.
  • Archival conservation supplies should be acid-free, but not all professional art materials are acid-free. The same process of oxidation that causes artists’ oil paints to cure to a solid film makes them destructive to unprotected paper and canvas. This doesn’t mean oil paints are defective or unsuitable for permanent art; it does mean that craftsmanship and proper use are required to achieve durable results.

Craftsmanship, technical knowledge and display environment are at least as important as the materials themselves in achieving durable results. In other words, it’s not just what you use but how you use it, and how you care for the results. The word “archival” on a package does not guarantee durable results; it neither excuses the retailer from giving accurate advice nor the purchaser from understanding and applying good studio practices.

Image: Wikimedia commons-