In our investigation of the embrittlement of oil paints containing zinc oxide (see Sarah Sands’ 2018 article Zinc Oxide – Reviewing the Research), we made a lab trial containing titanium dioxide (PW6, “TiO2”) and 6% zinc oxide (PW4, “ZnO”) that used stand oil instead of our standard refined linseed oil. Two years later, we noticed … Read more
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Archive | Research
Methodological Issues and the Effect of White Pigments on Fading Introduction Lightfastness is usually reported in a single word or number—a simple answer for artists questioning a color’s permanence. Although lightfastness ratings are straightforward, lightfastness assessment is actually fairly complex, and a variety of factors can influence both laboratory and real-world lightfastness outcomes. To tackle … Read more
Introduction Our Lab, in conjunction with the Materials and Applications Specialists Department, recently updated the lightfastness testing for the entire QoR Watercolor line. Our testing methods employed a significantly expanded range of dilutions with water as well as incorporating, for the first time, tints with titanium white to more accurately simulate how artists use watercolor. The … Read more
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What is a realistic expectation for the ‘service life’ of a painting? How long can one expect a painting to last when using best practices and reasonably archival materials? We don’t have any definite answers, but we’ll try to put things into perspective for you. The oldest surviving body of work from the Western painting … Read more
Introduction For some time, our recommendation for artists using oils over acrylic has been to work over harder, matte acrylic surfaces and avoid working on softer gels and gloss products. Our intention was to optimize the level of adhesion that would be achieved on a toothier surface as well as avoid the potential for future … Read more
When I first started working for GOLDEN, training to become a Materials and Application Specialist, I was told that I should never give restoration advice. Coming from a painting conservation background I understood the concern and the reason behind it. GOLDEN as a company would put itself in a vulnerable position if we were to … Read more
You would think that we would know more by now; that the questions would be answered, the arguments settled. But we don’t, and they aren’t. Even basic and fundamental issues continue to remain unaddressed by research. Will cold-pressed or alkali-refined linseed oil yellow more? Do historical and traditional processing methods lessen that? How do all … Read more
Introduction This article is a companion piece to Zinc Oxide – Warnings Cautions and Best Practices, published in our print newsletter, Just Paint, Issue 35, as well as our FAQs Concerning Zinc Oxide (PW 4) in Oil Paints From the start zinc oxide has lived a double life – at turns celebrated and shunned, loathed and loved. On … Read more
Introduction Golden Artist Colors is a company that has a very clear goal of making the best artist paints possible! In a time when so many companies see how far they can reduce quality before a consumer notices, GOLDEN continues to resist this trend and make improvements wherever possible regardless of cost. Artists and conservators … Read more
Introduction The use of Zinc Oxide in oils has been the focus of a lot of attention lately, especially around its potential to cause an increased rate and degree of embrittlement, cracking, and cleavage of oil paint films. Passionate positions have been staked out on all sides, while various studies have been cited and pored … Read more
