Nanoparticles are particles that are really small, ranging between 1 – 100 nanometers (nm). They can be categorized into groups based off of their shapes and sizes as well as their own properties. Those properties can be things like fullerenes or whether they are ceramic, metal, or polymeric nanoparticles. All of these properties have both physical and chemical properties as well as optical properties because of their nanoscale size. Other properties like toughness and reactivity depend on size as well as shape and structure. All of these characteristics are what makes nanoparticles so easily workable with a variety of commercial products such as medical applications, environmental applications, food safety, imaging, etc. The first records of nanoparticle research can be dated back to the 9th century in Mesopotamia. This was back when the surface of pots had a shiny effect that artisans made. During the 17th century, metallic film was placed on top of the glazing of pottery to create a glittery shine. As long as the film does not undergo any weathering or oxidation in the atmosphere then the shine will still be able to be seen. For this sort of pottery in particular, there are silver and copper nanoparticles mixed into the ceramic glaze when the film is applied. Artisans mix the salts and oxides of silver and copper with some clay, ochre, and vinegar onto the glazed pottery to make the nanoparticles. Then once these pots are heated, the glaze gets softer and the ions move to the outside layer of the glaze.It is possible that, despite the benefits of nanoparticles, there has been exposure to humans. Since the health effects of the exposure are still being researched, many have been cautious about the number of nanoparticles used in domestic products. Exposure to ultrafine particles can be toxic to humans because of its creation through anthropogenic activities. Since the creation of ultrafine particles is similar to the way nanoparticles are made, there is an assumption that there will be similar health effects on people.