His home and studio are located in central Denver, Colorado. Working full-time as a potter and artist, he produces six bodies of work a year. Each body of work offers him the opportunity to explore new ideas and refine existing ones. Karner has said that he is intrigued by the marriage of form and decoration. In striving to integrate these in each pot, he has the opportunity to create work that is both timeless and modern.
Karner works with either porcelain or stoneware. His pots are thrown, thrown and altered, or hand-built. To achieve visual depth in his patterns, he employs five elements. Four of these--wax resist, latex, dipping, and brushwork--are applied to bisqued pots. The pots are then high-fired in a heavy reduction atmosphere with the intent of trapping carbon in the base glaze. It is trapped carbon that is the fifth and random element. Each pot is designed to serve a functional purpose and is compatible with modern appliances.