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Showing results for tags 'mold'.
Found 13 results
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I just mixed a bunch of colored slips for the studio using trimmings from Laguna #65. I left the studio for 2 weeks and I come back and all the slips I mixed have turned black and smell something fierce. How can I fix or prevent this for next time cause I definitely just burned $20 of mason stain. Would a vinegar ratio have killed bacteria growth? Should I not have used trimmings and just mixed a clay base?
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I just finished my senior year of high school, and I had done a lot of experimenting with slip casting at home (we didnt have the resources/time to do it at school). I kept my used slip in a few empty plastic coffee containers, and my fresh stuff in a large square plastic container. I hadnt been able to use my slip for about a month, but when i went to check on it there’s green stuff floating all around in it, which I think is mold. It’s a stoneware clay, and I kept my container out side, with a bag covering it, because I dont think the lid has an air tight seal on it. What should I do with this slip? Should i let it dry out if it’ll kill off the mold and just rework it after? Would mixing it or adding something help?
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Hi there! So my question is very basic but I just want to know the best way to fix a plaster mold that has broken. I have used in weld to fix all my broken ceramics and it has worked beautifully, but I wasn’t sure if it would work on plaster? Another thing I was going to try was to use plaster to glue it back on, but wasn’t sure if that would work either so just wanted to ask for some advice first. Thanks! Nate
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It has been a long time since I have done anything with molds as I am mainly a wheel thrower. I have a plaster fruit bowl mold (hump mold over a year old but have never used it before until now) and my clay won't release from it and I'm scared that if I don't take it off soon that it will crack (its been on the mold for almost a full day uncovered). I can't get it off, what should I do? And how do you keep your clay from sticking to your plaster molds? -
Hi all, I am trying to figure out how to make figures reminiscent of Staffordshire pottery, such as the following (sorry it's so big): Apparently these were made using press molds. But I have no idea how the original was made and cast. I bought Plaster Mold and Model Making by Chaney and Skee, but I still don't feel any closer to figuring out this fundamental question. For example, is the original made of clay and then cast before firing? (Obviously, something like the above piece would need several molds in order to create it.) Or were the multiple pieces fired first and then cast? If so, if the parts were thicker than an inch, were they completely dried before firing and then fired at a low temperature? (If this is the method you would recommend, what temperature do you think would be safe to go to?) I found the following very interesting site of an artist working in this old style, but she is using oil-based clay, and somehow I don't think the Old English potters were using that: https://porcelainmenagerie.wordpress.com/ Anyway, if anyone has any info on this (books, advice, etc.), I would be ever so grateful! Thanks in advance, Havely -
Hi and thanks for having me in the forum. I am a total beginner and I was wondering how you achieve such a result (lots of tiny well formed bubbles and spikes). Are they totally handmade or is there some other process behind it? Are there any stamps or molds for it? thanks! -
I have been wanting to make a plaster mold of an ice cream cone but am worried that it will get soggy and fall apart. Does anyone have any tips or advice?
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Hi! I just came across this wonderful forum page and hopefully someone here can help me out! I recently bought a used kiln but did not have a proper space for it, so I kept it in safe storage for a while. Ive finally built an outside space for it, but unfortunately it had to be left outside covered with a tarp for a few days until the electrician came. Naturally it decided to rain for the entire week, so I'm afraid the tarp didn't fully hold up to its potential. Being that I got the kiln a while ago, I can't remember if the underside of the lid always looked like this. I was wondering what do you think this dark ring looks like? I think it looks like it could be mold, but am not fully sure. Do you think, because of the condensation from the rain, mold started to grow on the underside of the lid? Is there anyways of removing this potential mold by burning it off or scraping it? Hope someone here can help! -G
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Hi guys, I am looking to make a multiple piece mould (imagine I'm casting coke can's and want to make a mould that casts 6 of those coke cans at once). It would be a one piece mold, as in one piece of plaster like a brick with 6 holes in it and a 'plate' piece underneath it. Would this cause an issue to cast 6 masters assembled like a grid, in terms of how the water absorbs into the plaster? ie. With two placed next to each other, would the water absorb through and clash with the water being absorbed from its neighbour? Any help would be great! Cheers.
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Dear Ceramic Arts Community members, I have been making plates and bowls with a ceramic press. Surely, all sorts of factors determine whether a piece releases easily from the ceramic press mold after being pressed, but I'd like suggestions from the community about how the clay body contributes to a smooth, non-sticking release. You see, the easier the release, the better the chances the piece doesn't stick, get stressed non-uniformly, and then warp later. I am wondering if there are materials in the clay body I should be avoiding, or adding... Any advice, information or referrals for help would be appreciated. Thank you! James -
Hi, I am having problems with some plaster slip- casting molds that I use regularly. I made the molds in March this year and suspect I have cast into each around 30 times. Over the summer they have sat unused for two months in a dry cupboard. I have gone back to use them and I'm finding the casts are now more reluctant to pop out. They seem to be sort of sucked in there and the plaster doesn't want to release the cast. They are five part molds and sometimes just one side seems to stick on, as if it can't take the moisture out of the slip - even if the rest of the cast is relatively dry. The casts will come out in the end but they are taking longer than before and I risk ripping the casts when removing them. Does a mold have an expiry date? Could there be anything I could treat them with? Please help! Thanks, Elle
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Does anyone know if you can fix a hot spot on a mold?
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Hi there, this is my first post on this very helpful site. I can't seem to find much information anywhere about using rubber to make mold masters for recreating slipcast molds. I have been experimenting with making rubber masters of my molds (mostly 2 to 3 piece molds). But I find that whenever I pour a new mold from the master, they don't quite fit together as well as the original. I have experimented with a few different types of rubber, but am limited to products that don't need degassing. Is there any one particular product that is recommended for use in this situation? I've attached a couple of photos to show how I am constructing my masters. The blue handle mold was made using Smooth-on Oomoo 25 (which is very soft), and the light colored one was made using Polytek Polygel 35. Any little tips or tricks would be greatly appreciated. Thanks
