Many ceramic coatings contain high levels of heavy metal elements as colorants that are environmentally unfriendly and toxic to users. Metallic nanoparticles, including gold and silver, have been proposed as an alternative to these metal colorants due to their versatile color profiles, benign nature, and more efficient color mechanism via surface plasmon resonance. This research explores the effects of common ceramic sintering processes on nanoparticles within glazes in common studio reductive and oxidative kilns. This work also employs direct application of gold and silver salts in glazes to probe and better understand the mechanistic processes for nanoparticle-laced glazes that are viable in the art community. These processes avoid the need for complicated reductants, glassware, or preliminary heating elements, thus allowing for environmentally friendlier yet economically viable applications of nanoparticle colorants.