Tina01
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Tina01 reacted to a post in a topic:
Why my clay acts like this?
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Kelly in AK reacted to a post in a topic:
Why my clay acts like this?
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Why my clay acts like this?
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: ) Thank you sooooo much! kisses! ; )
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Hi all! Some updates... I finally built and cooked my first pot! : ) well... it's a vase I guess. I don't know if it has cooked thoroughly or not, but it turn from slightly greenish gray to pinkish beige. A few small areas had a different , more saturated green hue when I took it out of my kiln. It's hard on surface, not scratches with fingernails but does with sharp metals. Absorbs water but doesn’t disolve or making my finger muddy when rubbing it wet. Still I'm afraid to fill it with water although some smaller thinner testing items I cooked with it are still holding strong under water after 20 days. hunting/making clay is still in progress. as the last formula didn't work (infact it couldn't be tested as it had a horrible smell, something like fetid swamp rotten eggs after 5 days). Most likely because my bentonite keeps molding, no matter how many times I remove the mold layer from the top. So I finally mixed all the different clays I had and still working on dry powders to find a solution.
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Tina01 reacted to a post in a topic:
Why my clay acts like this?
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Hi! and thank you for these details! Now unfortunately I can't do it with such a precision, (in 0.1 of grams). But for sure I will keep trying! Now about 72 hours most of it has settled and there seems no more activity, and also the top layer seems totally dry (even though the lid was on it the whole time). so I will remove that. Hi! and thank you for your response! Yes, the next batch will be different hopefully the one I'm looking for! perhaps I should've listened to @Min also and try to make something with ready-made clay, but I have this bad habit of trying to understand everything at once and doing all the work myself, from hunting to glazing. I will continue anyway! So again thank you and thanks to all who share their experiences. It's a huge help for me and I highly appreciate it!
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Thank you! If you watch the video on that page, the nature of the whole process seems different. it just submerged after a couple of minutes and was crumbling under water to fully disperse (in 5 hours she says). but mine didn't sink until after 18 hours and it was still a clumpy. then it raised to top again. The 5 grams in 100ml I used was derived from@glazenerd formula, which originally was 5g to 220g of clay and 75ml of water. By the last sample if you mean the last two photos (after 24h) I was hoping that it should have dispersed and sunk completely (vs 5 hours). Perhaps the container wasn't large enough as you said or my bento isn't really bento. Hi! : - * Thank you! Yes, a thin layer settled as it's visible in the first photo. I also doubt about it, if it submerged totally (at 16 hours) why again some of it rise to the surface? as you're not sure what that "scum" is, and I wasn't either, so I asked that if I should dump those perhaps using a spoon in my previous post. Now after about 36 hours it seems a little of that top layer (about 1/3) has settled and slightly smells molding (but no visible evidences yet). Again, Thank you both for your help and care. p.s. As many times mentioned in this thread that bento can absorb water 15x its weight, 5g could absorb 75g, or 75ml water. However what I see is more than 50ml is still free water.
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Well something is wrong, I did that, as she was stated, tried to sprinkle bentonite on water and not touch that. Mine is a mix? of only 5 grams bento with 100ml(grams) water. But according to her, after 5~10 min it should disperse and after ~5 hours settled down so clear water on top can be siphoned. Mine didn't go like that: at T+1 minute: at T+6 hours: at T+ 18 hours: at T+ 24 hours: should I stop this? It feels like it's going to mold.
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sure, but didn't want to change the formula that Tom had calculated with much trouble... Thank you Tom and sorry again for the troubles, hope you've read my message. I know that about bento, that makes me think if I add 75ml ~= 75grams water/bs to the mix, all the water will get absorbed by bento (5g x 15 = 75) So what will remain for the clay itself? I am and hope they stay on this site also, they might be useful for someone else. Yes, I did so, but didn't know have to wear a mask. Added 10ml more water as a total of 80ml. flattening it inside ziplock bag hopefully to get into the body. still it's confusing that bento eats all so no water will mixed with clay even if bento dispersed evenly inside body. or perhaps I'm wrong. That was interesting, though I doubt it works! mine will probably just clog the top of the tube! I will try that anyway. TYSM all!
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Tina01 reacted to a post in a topic:
Why my clay acts like this?
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Thank you so much Tom. I guess the water was a bit low, instead of 60ml I added 70ml but didn't go further as you should've calculated it correctly. 220g clay + 5g bentonite after adding 70ml of water/baking soda solution: nowhere near pliable. after much wedging kneading compressing, best ball shape: so put it in a plastic bag and sealed for further diagnosis and remedies .
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Tina01 reacted to a post in a topic:
Why my clay acts like this?
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@Babs @glazenerd I conducted a PH test, Don’t know if it's useful or not but hopefully it will as it took 2 days! I didn't have a fancy test kit so I used a red cabbage : D but tried to be as precise as possible. 01) The amount used for each test. Then I added 1/2 tablespoon of following materials, stirred well, then added water to 100ml, let that sink if it was required. 02) HCl , diluted, strongest I could find. 03) Vinegar 04) Tomato 05) Colorless soft drink 06) Water 07) Old red recycled clay 08) Current clay 09) Egg 10) Baking soda (saturated water) 11) Bleach So I think: The new clay is more alkaline than old one but not much, it could be around 7.4 or7.5 ( calculating this value with normalization, if the original indicator be of any PH value, still best approximation for water is 7 and egg is certainly 7.8) Then it falls between these values.
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Tina01 reacted to a post in a topic:
Why my clay acts like this?
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Tina01 reacted to a post in a topic:
Why my clay acts like this?
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Tina01 reacted to a post in a topic:
Why my clay acts like this?
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Tina01 reacted to a post in a topic:
Why my clay acts like this?
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That would be a huge favor! (discard the old reddish clay as I can't find the exact same one and you already know that it was from a couple of years ago). but for the greenish one I can buy whatever amount I want. Also the weird thing regarding the scale is I already tried that before, but those small scales are hard to find, unfortunately if you ask for them they give a look as if I'm a drug dealer (some even ask for it!). But I will try again for sure!
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@glazenerd Sure Tom, please view the pervious post , You posted this while I was editing that one to add more details.
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That's weird! quote from the the link: "Vinegar is also used in clay bodies to increase acidity to improve plasticity. The acid works to neutralize sodium ions (from water, leaching feldspars) that tend to deflocculate the clay. Excessive acid may tend to dissolve more feldspar or nepheline syenite negating the effect." but @glazenerd told me the opposite. or my recycled clay was too much acidic in the first place, or I have trouble understanding it. but a recap: there were lumps in soaked clay even after a week: putting it in a water+baking soda helped to disperse: thinking the clay was acidic, I assumed that the new clay I've found is also acidic, and after the failure with bentonite, I made another batch from it but I also added 1 tablespoon of baking soda to 700g of clay. It had a subtle reaction (fuzzing). Now I feel it's very hollow and soft, weighing 650g at a clay consistency. (there was some inevitable losses here and there but not that much). anyone knows how much it's off scale? comparing recycled (left) with new+baking soda(right): but I didn't realized I did a big mistake by adding baking soda soda until I saw the pervious clay: it's covered with salt. : ( That's gonna happen to the new bach also. : ( so again I run another test, mixing with dissolved baking soda and vinegar separately. with baking soda: not so strong reaction but still fuzzing. 1/2 tblsp in 1/4 cup water dissolved as much possible. with vinegar: very strong reaction, 1 tblsp vinegar in 1 tblspn water. So it reacts with both, I dont know what's the PH level! after settling down it seems baking soda (left) still was more successful to disperse the particles (smooth top):
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Tina01 reacted to a post in a topic:
Why my clay acts like this?
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Tina01 reacted to a post in a topic:
Why my clay acts like this?
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Yes it was the same clay. Vinegar? I think the soil is acidic why adding more vinegar? to settle small particles? Well I'm now totally afraid to add even a pinch of bentonite again because it had exactly the reverse effect of what I wanted! perhaps I added too much but still it shouldn't change it so drastically and in opposite direction! but since you are experienced I'll try that either! TYSM for guidance.
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This was the kindest reply I've ever got! Your heartwarming words are really valuable to me and makes me more willing and active. So thank you to the moon and back! it seems I can't post emojies here but a huge hug and kiss! I will certainly check out that book. Again, thank you! @ } ; -
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Kelly in AK reacted to a post in a topic:
Why my clay acts like this?
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No, I mixed both in dry form then with water. after stirring well pour it on that black fabric to draw excess water and sat overnight. this was the next day result, dry on surface but wet underneath. scrub that from fabric and that was the final result in the video. Even some ordinary mud is more clay like than that. couldn't even make a thick coil out of it as it was breaking apart.
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@glazenerd adding bentonite was totally wrong. I added 1 teaspoon to 250g of clay. https://sendvid.com/hb3db3wr wet but crumbling, couldn't even wedge. wasn't clay anymore.
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