tag:blogger.com,1999:blog-7184126423669640998.post8942225796476185875..comments2024-03-27T17:04:45.202-04:00Comments on Blue Starr Gallery: Parallel LinesLinda Starrhttp://www.blogger.com/profile/04364078667554676592noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-7184126423669640998.post-59882998747001469702011-09-15T16:00:04.374-04:002011-09-15T16:00:04.374-04:00Hi Michele, thanks, the cones are self supporting,...Hi Michele, thanks, the cones are self supporting, but I put them on a hard pre-made cone stand, but some how it leaned backwards. I probably need to put a cone 7 in the next firing to see how it does. The self supporting cones already lean in a certain directing and I always make sure they are leaning the correct direction, but somehow it hasn't worked the last two times.<br /><br />Perhaps the additional heat was because I had two half shelves and posts in the load and that added to the overall heat of the load. I will try slicing off the clay a different direction next time to see how that affects the outcome, good idea, thanks so much.Linda Starrhttps://www.blogger.com/profile/04364078667554676592noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-77504050552734495402011-09-15T15:30:02.754-04:002011-09-15T15:30:02.754-04:00me typing for jeff again... since you didn't w...me typing for jeff again... since you didn't wedge it is most likely the swirl from the pug mill at the factory. he suggest cutting a slab vertically from your tube of clay and see if it eliminates the swirl.<br /><br />me again... was your cone 5 facing the wrong direction? do you use self standing or make cone packs? we make cone packs and i am always fearful of putting one in the wrong direction. i double check them by standing them up and knocking them over to see where they fall even though i know if the numbers are in the right direction they will be fine. i think it's an OCD thing!!<br />on another note... we fire to ^10 but always put a ^11 so we know if we have gone too hot, although most of our glazes are ok at 11.Michèle Hastingshttps://www.blogger.com/profile/11346907762804197879noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-985507357356838292011-09-15T12:22:56.414-04:002011-09-15T12:22:56.414-04:00Ok I just re-looked at the cones. The cone 5 fell ...Ok I just re-looked at the cones. The cone 5 fell back and hit cone 6 underneath which may in turn have propped up cone 6 which might mean that cone 6 would have fallen over lower if cone 5 hadn't held it up, which would mean that it may have fired a little over cone 6, which may mean it was a little too hot. I looked at the cones for the other once fire and the cones did the same thing, touching or kissing and holding each other up. So I will adjust my firing schedule for the next once fire and reduce the hold time by five minutes to see if that makes a difference. I will also start taking a photo of each cone pack when I fire so I can compare them. Since initially I didn't notice the swirl marks on the tiles till after I really started to look at them.Linda Starrhttps://www.blogger.com/profile/04364078667554676592noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-71312457444717314562011-09-15T12:13:18.653-04:002011-09-15T12:13:18.653-04:00Hi Michele, thanks, no I do not wedge the clay. I ...Hi Michele, thanks, no I do not wedge the clay. I cut a very thick slab from the block of clay straight from the bag. I press it down with my palms to about 3/4 of an inch and then I begin rolling it, roll one direction, flip it over, roll another, flip it over, I rotate which direction I flip it over till I get it to the thickness I want. Then I take rib and compress in two or three different directions. I'll try to go thicker next time to see what happens. Thanks ever so much. These were on lower shelves and not much space between each shelf and since they were upside down I was thinking the outgassing might have had a hard time escaping being trapped within the sides, but the swirls are too even for that so it must be the way the clay was initally mixed. I will check with Laguna and Bennet's. I have always made my slabs of clay this way even high fire and have never had this kinds of swirl before.Linda Starrhttps://www.blogger.com/profile/04364078667554676592noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-12861988194282410232011-09-15T12:09:43.581-04:002011-09-15T12:09:43.581-04:00Long ago, I took a class where we made chunky wall...Long ago, I took a class where we made chunky wall tiles by joining stiff slabs around the edge and building a + structure inside to support from warping, but I really love the way yours curve. Maybe you could make some sort of supports that would go under the tiles while firing?<br />@Barbara, yeah, I would have if it was my studio, and I had purchased it, but alas, I work in a community studio. I did take note, however, for the day I'm buying my own clay.Brianhttps://www.blogger.com/profile/07791283568073889587noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-89062877415145304062011-09-15T11:30:13.842-04:002011-09-15T11:30:13.842-04:00i was so intrigued with your swirl that i asked je...i was so intrigued with your swirl that i asked jeff to look at it. his first question was do you wedge your clay before making your tiles? his theory is if you wedged your clay and rolled it out with the "rolled" ends of your clay on the top and the bottom as opposed to laying it on it's side (rolled ends to the left and right), the swirl came from that. he also said that may have played a part in the warping. he also agreed that thicker slabs may help.<br />i am not sure if i was able to put that into understandable words!Michèle Hastingshttps://www.blogger.com/profile/11346907762804197879noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-28574114652898204252011-09-15T11:28:54.475-04:002011-09-15T11:28:54.475-04:00Hi Lori, thanks, I am drying these on wall board l...Hi Lori, thanks, I am drying these on wall board lightly covered for weeks inside my home. I've been having pretty good luck with no cracking once I made them a little thinner. None of these cracked and I think the warping was because of the way I dried them on foam. I used the foam because I wanted the sides to curve around the wood backing I'll be putting so they can be hung on the wall. I may need to improve that drying method and it will straighten this warping problem out, because the flat ones do just fine.Linda Starrhttps://www.blogger.com/profile/04364078667554676592noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-58074152680990128862011-09-15T11:25:56.254-04:002011-09-15T11:25:56.254-04:00Hi Michele, thanks, the tiles are 1/4 inch after f...Hi Michele, thanks, the tiles are 1/4 inch after firing. I didn't want to make them too thick since they are to hand on the wall. I actually had more cracking when I made them thicker. I may need to find a happy medium of a little thicker but not so thick they crack. I had a bunch warp, but I also had a bunch that didn't and so many good ones, it's not so diappointing.<br /><br />Hi Barbara, thanks, the swirl pattern is so even I think it must be some of the ingredient that didn't get mixed. First time I ever saw that. I didn't call them cause I just noticed it this week and wondered what it was. This wasn't supposed to be any gumbo, it's Laguna WC 601 #30, supposed to be Cone 6 and ideal for hand building and sculptures. I've used it before and never had this swirling so it may be a fluke for just this time. I may see about using WC 614.Linda Starrhttps://www.blogger.com/profile/04364078667554676592noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-30395149842091895382011-09-15T11:17:16.739-04:002011-09-15T11:17:16.739-04:00I've dried tiles very slowly on a baking rack ...I've dried tiles very slowly on a baking rack so they get air on all sides. For non-tiles I still like to dry them on a towel or old t-shirt on a wire shelf, it may help cracking too.Lori Buffhttps://www.blogger.com/profile/00233955188892423314noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-88842995812167571342011-09-15T10:04:41.914-04:002011-09-15T10:04:41.914-04:00If this is Cone 6 clay fired to cone 6, could just...If this is Cone 6 clay fired to cone 6, could just be that the clay can't hold up with that thinness being fired right at it's maturity. Thicker slabs as Michelle suggested? Maybe try firing a bit lower? Maybe try using Cone 10 clay fired to Cone 6? It's more work, but maybe slab side supports of some sort?<br /><br />Think the swirl is just from the mixing in the industrial de-airing pug mills the clay companies use. @Brian -- hope you called them - that should never happen. Clay company I used to work for had a really cheap clay called "gumbo" that was the clay that came out between batches. It was always a surprise in every bag, but people expected that :)barbaradonovanhttps://www.blogger.com/profile/06694148642745082571noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-39097557803973851042011-09-15T09:17:11.353-04:002011-09-15T09:17:11.353-04:00i don't have any insight to the swirl but i am...i don't have any insight to the swirl but i am wondering if your tiles were thicker, since they are quite large, you may have less warping. that sure is some serious warping, so disappointing after you put all that work in the slip application and carving.Michèle Hastingshttps://www.blogger.com/profile/11346907762804197879noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-19682694800883917282011-09-15T09:00:39.265-04:002011-09-15T09:00:39.265-04:00Hi Jane and Lance, thanks, and sometimes it's ...Hi Jane and Lance, thanks, and sometimes it's hard to decide which color ones likes best, part of the fun of it though.<br /><br />Hi Dennis, thanks, yeah the earthiness of the clay is part of it's charm.<br /><br />Hi Anna, thanks, normally I use high fire sand underneath too, but this time I didn't to no ill effect.<br /><br />Hi Brian, thanks, I didn't notice any swirls when I cut into the clay, I'll look more closely at that. After I cut the clay I press the thick slab down with my palms then I roll the clay in several different directions till I get it to the thickness I want before using it, flipping it over after each roll, so you would think that the ingredient would have distributed. It will be interestng to see with some other pieces I have made, if the same thing happens.Linda Starrhttps://www.blogger.com/profile/04364078667554676592noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-11767724503140158522011-09-15T08:44:28.731-04:002011-09-15T08:44:28.731-04:00Don't count on the supplier mixing the clay we...Don't count on the supplier mixing the clay well. I've sliced into blocks that have a center 'square' of one shade, and a 1-2" border of another around the outside.<br />I'm a thrower, so I always wedge anyway, but annoying.<br />If you make a careful slice with a smooth wire, can you see any swirl on the raw clay?Brianhttps://www.blogger.com/profile/07791283568073889587noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-8736541731926627042011-09-15T07:57:22.349-04:002011-09-15T07:57:22.349-04:00Hi Linda, Like Dennis I don't work often with ...Hi Linda, Like Dennis I don't work often with slabs and when I have, I fire flat sheets with high firing sand underneath so the piece can move as it shrinks. Perhaps the swirl could be some extra iron oxide in the clay that built up as it was prepared at the supplier if there is no weakness there.Annahttps://www.blogger.com/profile/03620588456375419442noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-2372461668577120902011-09-15T07:47:03.459-04:002011-09-15T07:47:03.459-04:00Hi Linda. I am not a slab expert so no advice ther...Hi Linda. I am not a slab expert so no advice there.You know I like red clay and letting some of it show. The parallel pots sounds like a good theme.Dennis Allenhttps://www.blogger.com/profile/01170187288282755570noreply@blogger.comtag:blogger.com,1999:blog-7184126423669640998.post-30634485081580589702011-09-15T05:23:27.181-04:002011-09-15T05:23:27.181-04:00Hello Linda:
Well, we have no answers but, althoug...Hello Linda:<br />Well, we have no answers but, although disappointing for you, we are learning a great deal about the trials and tribulations of pottery making.<br /><br />The clay colour does make a difference to the tints and tones of other colours used and it is an intriguing conundrum to decide which is best.Jane and Lance Hattatthttps://www.blogger.com/profile/16831890261259302647noreply@blogger.com