This is the most common and best alternative gold powder that is manufactured in Japan. It is milled to #325 and is an ultra fine dust made intentionally for Kintsugi (traditionally Japanese gold repair) and Maki-e (traditional Japanese lacquer work). I wrote my Master's dissertation on conservation of Japanese Ceramic's 20 years ago at NYU and worked at the Brooklyn Museum in their Asian Art Department. I have practiced Kintsugi for near 20 years and this is the best powder I have found as an alternative for gold. The easiest method of application is with a brush over the tacky repaired surface.