Ceramic Human
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Ceramic Human reacted to a post in a topic:
First glaze recipe attempt - looking for flaws and cone
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Having trouble getting some grey Mason Stains to turn out grey. I don't have a picture, but the pearl grey kept turning out purple and the sage grey turns out a lot more blue than we'd like. Included picture shows Sage grey at 4 parts to 100. Definitely not like the color showed. Firing to cone 5 and using Coyote clay's clear glaze as a base. Both Glaze to stain ratios were 100grams -4 grams. Dipping once and holding for 3 seconds. Do I need to add a lot more stain or is it a firing or application problem? Any ideas? Edit: Camera on phone was pretty bad but it is more blue t
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Agreed. Ceramics in general does contribute, but how does the question I am posing specifically contribute to global warming or environmental destruction? Not being sassy here. I am genuinely ignorant. (:
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Okay. Agreed. But by this definition, there are plenty of responsible and environmentally good things you could do to the ground that also "change" it.
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Ceramic Human reacted to a post in a topic:
Clay Disposal/Recycling
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Lol. We will still use it to adjust the moisture in "out of the box" clay. It also seems to reduce air pockets and serves as a substitute for wedging. Otherwise I'd give you a friend discount.
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Interesting. What I hear you saying is that clay disposal is harmful to the environment because it suffocates plant life. Is that correct? What about naturally occurring clay? Would you consider that to be environmentally unfriendly as well? Because that stuff suffocates plant life too. As far as eliminating a job for a person who really needs it, yeah that sucks. But we don't keep jobs around because people need them. We create jobs because they engage a need that the business has.
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Ceramic Human reacted to a post in a topic:
Clay Disposal/Recycling
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Ceramic Human reacted to a post in a topic:
Clay Disposal/Recycling
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That's a good idea. I'll look into this, thanks!
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I wasn't sure what topic to put this under, but it's about clay. Sorry if this is a repeat subject. Our company recycles 100% of our clay that isn't considered to be contaminated. We have a reclaim system that one of our employees manages, but this person is moving on from the company in a few days. They get the clay to the right consistency and run it through the pug to be reused. The problem we are running into is that it's actually cheaper and simpler to order new clay than it is to manage this process and inventory. So here's the crazy idea that might upset some folks. What if we
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Rae Reich reacted to a post in a topic:
Green Spots After Glaze Firing
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Ceramic Human reacted to a post in a topic:
Green Spots After Glaze Firing
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Green Spots After Glaze Firing
Ceramic Human replied to Ceramic Human's topic in Clay and Glaze Chemistry
Yeah, I thought about that and it's definitely possible, but I thought I'd ask you guys just to see if it was easy to rule out. There are so many factors, but I'm grateful to have this forum as a resource to help me get acquainted with the process. Sometimes it makes my head spin. I don't want to be an out of touch manager. The more information the better. -
Ceramic Human reacted to a post in a topic:
Green Spots After Glaze Firing
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Green Spots After Glaze Firing
Ceramic Human replied to Ceramic Human's topic in Clay and Glaze Chemistry
I'll crack open the next few that come out. Thanks. -
Green Spots After Glaze Firing
Ceramic Human replied to Ceramic Human's topic in Clay and Glaze Chemistry
I should have supplied more information. I didn't really give you guys a lot to go on. My bad. I'll look into the tools and possible contamination. A rate of 5/500 is 1% defect rate. I thought if it were a really simple fix then it would be worth reducing defect rates by 1%. Heck, even if it's not a simple fix. You fix two or three problems like this, and reduce your defect rate by half or more. I figure that's worth the time. -
Green Spots After Glaze Firing
Ceramic Human replied to Ceramic Human's topic in Clay and Glaze Chemistry
This particular glaze is the eggshell from Coyote. We mix a 25lb bags at a time and then sieve using 100 mesh. Not sure on the recipe for the dry mix, but I've attached a photo of the suggested water amount and specific gravity of eggshell. We only sieve after the initial mix. How frequently SHOULD a glaze be sieved? -
We're firing in an electric kiln to cone5. Been getting green spots like this on several mugs/week. It's usually only 3-4 out of 500 but that starts to add up over years of business. Do you guys have any experience with this defect?
