I forgot to ask my ceramics teacher this question and today was the last day of class! I made a mug, biqued it, painted it with englobe (sp?), and then painted cone 05 glaze on it and fired it. It might have been cone 5 glaze though (oops). At what point/temperature does the piece become functional? I want to give the mug as a gift for christmas, but wasn't sure if the person recieving it could actually drink out of it! How can I tell? When can you use the piece for drinking out of? HELP!?!
2006-12-21 06:37:35 · 4 answers · asked by Yazdnil 1 in Arts & Humanities ➔ Visual Arts ➔ Sculpture
I truly doubt your teacher would keep toxic glazes in a classroom setting, knowing full well many students are going to want to make things like mugs. You're probably safe there. Also, assuming your teacher is the one who does the firing, s/he will (likely) not keep both ^05 and ^5 in the studio, so it will be fully fired when s/he says it's done. For future reference, if you flick a fired piece with your finger and it makes a thud or a dull sound, it's either cracked or not fired. A finished piece should "ring" a little when you flick it.
2006-12-24 05:07:00 · answer #1 · answered by foghnanross 2 · 0⤊ 0⤋
If you fired a cone 05 clay to cone 5 it would be a puddle, if you put a cone 5 glaze and fired it to cone 05 it would look like it had not yet melted in place (as It would not have).
The easiest way to make a cone 05 glaze is to use a lot of lead, this is quite poisonous even though the glaze looks shiny.
There are non-lead glazes that fire to cone 05 but they are special and would say so somewhere, so I would assume lead unless I knew specifically otherwise.
Almost any fully fired glaze will hold water, but the clay itself will not be all that strong unless it is fired to much higher temperatures of say cone 8 or 10.
Of course the clay has to be of the sort that it will go there as well as the glaze. At such high temperatures the range of possible colors is much less however.
2006-12-24 14:45:44 · answer #2 · answered by Dragon 4 · 0⤊ 0⤋
glaze is very toxic so i suggest dont give it as a gift unless you wanna get the person sick
2006-12-24 02:15:38 · answer #3 · answered by brian v 2 · 0⤊ 0⤋
I don't think you can drink from it because of the glaze.
2006-12-21 16:52:34 · answer #4 · answered by Be Still and know He's God 5 · 0⤊ 0⤋