<p style=";text-align:left;direction:ltr">After intensive efforts by chemists from the University of Amsterdam and the Rijksmuseum to understand Rembrandt's painting "Night Watch", they finally discovered the secret of the distinctive colors in this painting. </p><figure class="image"><img style="aspect-ratio:250/330;" src="https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Rembrandt_van_Rijn_-_Self-Portrait_%281659%29.jpg/250px-Rembrandt_van_Rijn_-_Self-Portrait_%281659%29.jpg" ></figure><h2 style=";text-align:left;direction:ltr"> <span style="color:hsl(187, 48%, 51%);">Special vehicles to achieve distinctive colors</span> </h2><figure class="image"><img style="aspect-ratio:297/170;" src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRz7Fl3VUq5M7F7o3PPHGJGWKAo8NudCHsmYA&s" alt="The largest restoration of Rembrandt's 'Night Watch'... Live broadcast online | Annahar" ></figure><p style=";text-align:left;direction:ltr"> Chemists discovered that the Dutch painter was keen to manufacture special compounds from chemical elements in order to reach special colours and pigments that he used in his paintings, the most prominent and famous of which was the golden colour used in his famous painting “The Night Watch”. </p><figure class="image"><img style="aspect-ratio:1200/600;" src="https://static.hiamag.com/styles/1200x600/public/featured/2021/06/27/10682201-1747207904.jpg?itok=fWnKgqsp" alt="Using Artificial Intelligence to Recreate Rembrandt's Most Famous Paintings - Hi Magazine" ></figure><p style=";text-align:left;direction:ltr"> During their research on this painting, scientists discovered the presence of two basic materials in the colors in this painting, which cannot exist naturally but require specific methods to manufacture and obtain these colors.</p><h3 style=";text-align:left;direction:ltr"> <span style="color:hsl(187, 48%, 51%);">Toxic dyes not found in nature</span> </h3><figure class="image"><img style="aspect-ratio:700/400;" src="https://ol.om/wp-content/uploads/2021/06/img-121-152705-rembrandt-restoration-painting-holland_700x400.jpeg" alt="Rembrandt painting restored in museum thanks to AI | Oman Lover" ></figure><p style=";text-align:left;direction:ltr"> According to the researchers, the secret of the colors of this painting lies in the presence of toxic pigments, such as lead yellow mixed with mercury and sulfur to produce orange paint. It was also discovered that there are other shades of yellow and red from red arsenic - a substance that does not exist in nature but rather needs to be artificially modified.</p><p style=";text-align:left;direction:ltr"> It has not been revealed whether <a href="https://ar.wikipedia.org/wiki/%D8%B1%D8%A7%D9%85%D8%A8%D8%B1%D8%A7%D9%86%D8%AA">Rembrandt</a> prepared the pigments himself in his workshop or bought them ready-made, but historical documents indicate that the latter hypothesis is more plausible. In addition, evidence suggests that a wider range of toxic pigments were available in <a href="https://ar.wikipedia.org/w/index.php?title=Special:Search&search=%D8%A3%D9%88%D8%B1%D9%88%D8%A8%D8%A7&wprov=acrw1_0">Europe</a> in the 17th century than previously thought.</p>