Clara Pueblo, had produced the highly burnished black pottery, since the 1600s. Hewett sought a skilled pueblo potter who could re-create biscuit ware. His intention was to place re-created pots in museums and thus preserve the ancient art form. Maria Martinez was known in the Tewa pueblo of San Ildefonso, New Mexico for making the thinnest pots in the least time; therefore, Hewett saw her as the perfect Pueblo potter to bring his idea to life. This work was distinct from, but invariably confused with (in the popular narrative) the matte black on polished blackware that Maria and her husband experimented with and perfected on their own and for which there was no prior precedent, contrary to popular myth. Challenges and experiments A long process of experimentation and overcoming challenges was required to successfully recreate the black-on-black pottery style to meet Maria’s exacting standards. "As almost all clay found in the hills is not jet black, one specific challenge was to figure out a way to make the clay turn the desired color. Maria discovered, from observing the Tafoya family of Santa Clara Pueblo, who still practiced traditional pottery techniques, that smothering the fire surrounding the pottery during the outdoor firing process caused the smoke to be trapped and is deposited into the clay, creating various shades of black to gunmetal color." She experimented with the idea that an "unfired polished red vessel which was painted with a red slip on top of the polish and then fired in a smudging fire at a relatively cool temperature would result in a deep glossy black background with dull black decoration." Shards and sheep and horse manure placed around the outside and inside of the outdoor kiva-style adobe oven would give the pot a slicker matte finished appearance. After much trial and error, Maria successfully produced a black ware pot. The first pots for a museum were fired around 1913. These pots were undecorated, unsigned, and of a generally rough quality. The earliest record of this pottery was in a July 1920 exhibition held at the New Mexico Museum of Art. Embarrassed that she could not create high quality black pots in the style of the ancient Pueblo peoples, Martinez hid her pots away from the world. A few years later, Hewett and his guests visited the little Tewa Pueblo. These guests asked to purchase black ware pottery, similar to Martinez's pots