AndreaB Posted December 10, 2016 Report Share Posted December 10, 2016 Hi all, I've had an order for some slab platters for Christmas. I know last minute shopping! So I've slabbed four already, I've been told that porcelain slabs need to dry slowly. Problem being is we're in mid summer with temps of +30 deg C, I have no storage room since I work outside. Can anyone confirm this info? If so how long should I keep them wrapped in plastic? Bearing in mind that every time I work on them they dry even more. Thanks Andread Link to comment Share on other sites More sharing options...
Rebekah Krieger Posted December 10, 2016 Report Share Posted December 10, 2016 I don't know about slab work, but I presume they will need to dry carefully to prevent warping. As for porcelain, It has not been my experience that they don't need to dry any slower than other clay. Porcelain tends to dry faster , so caring for the moisture level just so you are able to complete all of your steps should be sufficient. But do get more opinions on the matter. Link to comment Share on other sites More sharing options...
Mark C. Posted December 10, 2016 Report Share Posted December 10, 2016 I just made two today I let them dry slowly for 1 day then dry them fast Link to comment Share on other sites More sharing options...
glazenerd Posted December 10, 2016 Report Share Posted December 10, 2016 The BIG issue is how BIG? When large slab platters are drying; they create the same problem when bisq firing: surface contact. The edges, rims not making contact with the drying surface- dries much quicker. The area making contact with the board dries much slower: and can drag as it dries. This is where unequal tensions show up later in the form of cracked pieces. As soon as it hits the leather=hard state, where it can be safely moved: flip it / support it: so it can dry on the bottom. _Another trick is to put it on wax paper when you are making it: the bottom is then free to move as the exposed areas dry. _ the whole issue is to dry it as evenly as possible. Nerd Link to comment Share on other sites More sharing options...
Guest Posted December 10, 2016 Report Share Posted December 10, 2016 Curious, can you bisque fire the platter with the rim facing down (rim touching the shelf) to help prevent warping? Link to comment Share on other sites More sharing options...
Mark C. Posted December 10, 2016 Report Share Posted December 10, 2016 The two that where made two days ago I will bisque today in a slow electric.They started out as just over 17 inches long and are ovals. I do not bisque on lip that sit flat. Any cracking issues are usually in the green state not when bisquing. These are all Porcelain. Link to comment Share on other sites More sharing options...
alabama Posted December 10, 2016 Report Share Posted December 10, 2016 Cat Jarosz had a video made of her work on HGTV some years ago.. I couldn't pull it up on the tablet but its on season 2 episode 44, in their "tune in times". She throws them, puts them in a vault for 30 days then sprigs and decorates them...when they're leather hard. Yes 30 days!¡!!! BTW, I've met her and family w/dogs and they're really nice!! Alabama Link to comment Share on other sites More sharing options...
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