19th Century saw an explosion of porcelain manufacturers across Europe. It became possible to mass produce porcelain, which made it more accessible to a wider segment of the market. This, however, meant that each piece spent less time in craftsmanship, and therefore did not have the intricate details and exceptional quality that characterized the 18th Century porcelain. While the quality did not necessarily decline in the 19th Century porcelain, there are certain elements that began fading out and ultimately were completely lost by the beginning of the 20th century.
Even so, porcelain produced in the 19th century had unquestionable quality that makes it highly valuable among collectors to this day.