When pottery is glazed there must be a section of the pot that is left without glaze where it can sit on a kiln shelf without being fused to it in the firing process (pots can also be propped up on metal spikes but this method is only advisable for smaller items as bigger pots can be prone to warping). The spot often left bare is called the “foot”. Something called ‘wax resist’ can be applied prior to glazing, thus glaze is repelled from the area when dipped in glaze. If wax gets anywhere it shouldn’t the pot must be re-fired once so the wax melts away. Or glaze is applied and removed as shown below on the set of plates I glazed on Saturday! I have found that scrapping the outlining the boundaries of the foot ring helps when removing the remaining glaze with a very wet sponge. Some pots you can just avoid getting the feet in contact with glaze by dipping a certain way. Like the mug pictured below. One of my most favorite things about the mugs I am currently making is the marks left in the glaze and slip from where my fingers were holding the pot! Anyways, just some techy info for you on a beautiful Saturday!
Techno-ology: Info on ceramics- definition, technique, history.