Hulk reacted to PeterH in Clay analysis, where to go?
Nope, try this https://tinyurl.com/y3rztakd
The two papers on Norway are at
PS If there are still problems I'll send google search strings
Hulk reacted to Callie Beller Diesel in Flocculation and specific gravity
The first video embedded there is by Sue Mcleod . Having read both Pete Pinnel and Tony Hansen, I have to say Sue’s in-depth explanations of glaze rheology are far better. She puts how when where and why in extensive and very easy to understand terms on her website. She also has the rare animal of a Facebook group that regularly posts accurate information and answers to questions.
Hulk reacted to PeterH in Flocculation and specific gravity
You may find this of interest. Adjusting Glazes for Application by Pete Pinnell https://www.claytimes.com/articles/glazeadjusting.html
My reading is that you need to re-flocculate a glaze if you have deflocculated it!
In Pete's words
So why would anyone deflocculate a glaze? Well, most of the time it's not done on purpose. The alkali can dissolve out into the water from some of our materials. Yes, we try to use only insoluble materials in our glazes (i.e. materials that will not dissolve in water), but in practice some of our materials do exhibit some solubility. The amount of solubility is very small, but since the clay content in most glazes is also small (often less than 10%), even a little solubility is enough. Some of the common materials that can cause this are wood ash, soda feldspar, nepheline syenite, many common frits, and lithium carbonate. I like to think of these as our problem children: they have qualities that make us want to keep them, but they can still make our lives miserable!
Hulk reacted to Bill Kielb in Looking for reliable white liner glaze recipes
You probably should add what clay you use, cone you fire to. Without it is tough to provide a recipe. Glazes that craze simply do not fit the coefficient of expansion of the body. Glaze recipes often don’t travel well so no matter what, you will need to test to be sure . Even test commercial glazes. If you already have a clear that works for you you can simply experiment with colorants to make it white. Glazy.org has a boatload of glazes you can search by cone and color as well. You might find a glaze or at least a sense of colorant proportions for your white.
while durability is something that needs to be tested, a flux ratio R2O:RO in the approximate range of 0.2:0.8 - 0.3:0.7 is an indicator of likely durability. Outside those values not so much. Ultimately testing is the only sure way to know though.
Hulk reacted to LeeU in Does it matter who you buy a kiln from?
Don't want to make his head explode. but I have to say, Neil is a gem. I am doing my thing today primarily due to the very kindly demeanor and generously shared expertise of, specifically, John Baymore in person (for hooking me up with his anagama firings & these forums) and virtually online & by phone, of Neil, for safe kiln installation on the porch of a house trailer in rural NH. May be TMI, but I'll leak out that I was running on fumes that were getting more toxic by the minute when I hit a fork in the road with one spur heading to ceramicsville. So yeah, it matters who you buy a kiln from LOL!
Hulk reacted to Min in Flocculation and specific gravity
I used to use a graduated cylinder when testing specific gravity but found using a 60 ml syringe is faster. It does hold a little back when you empty it so I draw up some water first, plunge it out then tare out the scale with the syringe on it. Then I draw up the glaze, bring it to the 50 ml line and rinse off any glaze that gets on the outside of the syringe, weigh it then double the amount. I find it less messy than using a graduated cylinder plus it's faster. I have a few I bought super inexpensively from Aliexpress. (which should be called Alislow as it takes forever for stuff to get here)
Hulk reacted to Min in Crazing and a moral dilemma
There is an interesting article from Dr Ryan Coppage, Dr Laura Runyen -Janeky and Ruhan Farsin who did some research into crazing versus non crazing glazes and bacteria. On Coppage's website there are a number of articles he has written; the one regarding crazing and bacteria is called "Dirty Dishes" and is available to read. His tests were done on porcelain, it would have been good to see a parallel set of tests done on a non vitrified claybody also.
Hulk got a reaction from Bill Kielb in Wheel bats hurting my arms
Was paying attention today whilst at the wheel: even when using the 5/8 inch bats, the splash pan edge is higher than the surface of the bat; I'm anchoring the catching arm (right for me, as I turn clock wise) mostly on the splash pan edge - built in cast pan - and elbow against my leg; I anchor the pressure hand (left for me) on my other leg.
My guess is a bit o' something to raise your forearms (hope your firearms are secured somewhere totally safe) a bit might help - keep trying adjustments until you're rockin'! Post back your solutions?
Hulk got a reaction from LeeU in QotW: Do you draw a line in the sand about technology when it comes to your studio or anything Ceramic?
As for (my reading of) the question, lots of tech in my Studio already, which is absolutely dependent on electricity to power lighting, wheel, kiln, audio system (yeh, it's important!), pyrometer, and mixing tools. I'm not interested in:
working by natural light only (nor by candle light);
kicking or otherwise powering the wheel myself, nor using a wheel less sensitive, consistent, precise, and powerful;
isolating myself from media whilst working (although shutting off the system, and rolling up the door to the sounds o' birds, wind, neighbors, ocean can be a nice change);
firing ware by burning stuff (not even the available natural gas, as there's just nowhere to put a gas kiln at our house, 'cept the courtyard, which ain' happenin');
working without a pyrometer;
mixing slurry - glaze, slip, reclaim - by hand.
Without "the internet" my journey into clay would have been much more ...stark; books and magazines are great, sure, as is meeting, working and sharing with others interested in clay, however, the depth and breadth of info, instantly available, as well as the lifetime of vids (some of which are worthwhile!) - amazing resource.
These advantages are all within the arc of my life, if one includes their parents' experience...
My list of tech to add includes:
new kiln, as current kiln is well worn, and when the time comes, with controller, to cut down on the back and forth to/from the kiln whilst firing.
That's all that comes to mind just now, although I am interested in mixing clay, seeing how rewarding mixing glazes has been, and how "wrong" so many clay bodies seem to be...
As for other machines, tech, tools, etc. exploring wheel thrown forms was (still is) the whole point - for me; very little hand building, no extrusions (yet), no molds, no nothin'! Hence, perhaps it's not "...drawing a line..." for me, rather just doing what I want.
Hulk got a reaction from Bill Kielb in QotW: Do you draw a line in the sand about technology when it comes to your studio or anything Ceramic?
As for controllers, I'll argue that the pyrometer is the bit o' tech that counts; the controller automates notetaking - time and temps, and switch throwing.
Hulk reacted to Min in Mystery Materials
Mike Bailey and David Hewitt wrote a really good article on identifying those mystery materials. They go through various methods of identifying materials including a bulk density test and LOI figures which can be quite useful. Link to it here.
Welcome to the forum.
Hulk reacted to oldlady in Consignment Store Record Keeping
thank you all. i raised my prices several years ago, smokey. was concerned that they were too high for this area when i started doing the farmers' market but nobody questioned the prices. the ones in the gift shop were my most expensive pieces and i did not give them any of the "normal" price range until nov 11. a special event was planned for three evenings so i took some of my small things and the very popular squares.
funny thing is, nobody questioned the prices but they did want to know if i used "stamps" (whatever they are) . i said i made them and they wanted to know where i got the "molds". then i started telling people i was a potter, i used mud to make the things they saw. clearly, farmer's markets are not the place to find pottery lovers. but i made money and will make more from the gift shop. thanks to farmers' markets for sales and meeting some new friends. A+ all around.
Hulk reacted to LeeU in QotW: Do you draw a line in the sand about technology when it comes to your studio or anything Ceramic?
I'm not feeling wordy this evening. In response to the query, no-nothing off limits that doesn't hurt me/anyone else should I choose to use it.
Hulk reacted to Callie Beller Diesel in Hate sieving glaze? DIY rotary sieve
When I first transitioned into more full time clay work, I did notice that because I was using my glazes more frequently and consequently keeping them stirred up on a regular basis, I had to sieve them less. When I was only having a glaze day every few months, glazes had more chance to hardpan and do other things that required sieving. As a part timer, I had to sieve all the glazes every time I wanted to use them because they'd been sitting too long. Now I only really do it when I add material to the bucket. I also found it saves scraping to give the inside of the bucket a quick swipe after a glazing session.
Hulk reacted to ronfire in Help with kiln not working
I removed the sitter tube and installed the thermocouple in place and the protection tube over top. I fit in well with the protection tube. I then moved the power input from one side of the sitter contact plate to the other side. All the switches and wiring from original stay in place. If I have to I can replace the sitter and rewire in about 10 min and be back to the stock setup. The wall controller stays cool and does not get to a dangerous temperature, I did add a fan to mine to cool it even further but does not require it to operate. The cooler you keep electronics the better it is on them.
I built mine with a Genesis controller, contactor and solid state relay. I also have a separate power system for a vent fan that gets controller by the controller. The vent fan uses the cord from a float switch so it just plugs into the wall and the vent fan pugs into that.
Hulk reacted to Babs in Ramp schedule for "slow and low" firing to cone 6
I got a less dramatic result with my normal firing to Cone 6 but wondered on reading about the Slow Low stuff what the schedule was.
some clays can handle a fast travel through inversion but that is FAST.
Thanks Hulk for fiinding that.
John Britt incredibly generous person.
Hulk reacted to PeterH in Ramp schedule for "slow and low" firing to cone 6
A few more "leopard spotting" pix and the firing cycle @Hulk found at:
John Britt's Group Spotted Glaze Tests 2018 | Flickr
Looks like there may be some interesting tests reported in the Facebook group.
Hulk got a reaction from hantremmer in I want to buy a kiln. What accessories should be on my shopping list?
Ventilation - kiln fumes are bad-oh!