Phil Hamling 376 County Route 1 Warwick, NY, USA 10990 e-mail: pdah-at-optonline.net (change the -at- to @) |
Zinc Silicate Crystalline Glaze Pottery A chronicle of my recent progress and a way for me to keep it straight in my head! Click on thumbnails to enlarge photos |
Info I've been asked to keep in confidence.
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Friends' Work VENDORS Workshops |
8-2-12 .5% Black Copper Oxide, .05% Cobalt Carbonate, .2% Red Iron Oxide and .1% Manganese Dioxide
7-28-12
7-28-12
7-22-12
Mo glaze recipe found in Sprechsaal, vol 122, No 4, 1989, written by Walter Kerstan. I do not know how it works. |
7-20-12 Effects of titania content and hold time.
7-18-12 Gordon's glaze
7-17-12 This is the first time I've seen any crystals come from one of Sanders' recipes. At this glaze loading 3% MoOx seems to be the trick.
The crystals and iridescence are almost impossible to see unless in reflected white light. |
Studio Camera 216.6.141.14:1026 Username "admin" Password "view123456" |
From at the barn: |
It looks like 4 1/2% red copper oxide, 1 1/2% cobalt carbonate and 1 1/2% manganese dioxide is more than this wimpy ^4 glaze can digest. |
7-15-12 Revisiting one of Herbert Sanders' ^4 recipes and trying to get the moly content right, plus looking at the influence of rutile in another.
7-13-12 Yesterday Phil and I made a quick stop at the new building.
7-9-12
7-4-12 Feri has been making some tremendous work. It is good to see him back at it again. He has to be in that group of 3 crystalline artists.
One of my favorites | Before and After | A view from behind the scenes |
6-25-12 I made a mixture of ~100g tin chloride + 100g isopropyl alcohol and used Jamie's booze bag to drip it in while I held the kiln at ~1200F by adjusting the hi - med - low knobs. I had to add ~40g water to get all the salt to dissolve. For the first 20 minutes it was going at ~ 1 drip per second, then for the next 20 minutes ~5 drips per second.
The green copper piece at 9 o'clock did not change. The partially red, previously reduced, copper piece at 11:30 seemed to re-oxidize and lost most of the red color. I'll do it again at 1300F with much more alcohol.
I recently spotted these at "Art on the Green" | Savannah and Kat |
I had to do some Photoshop work because Kat was wearing these ridiculous heels which put her up in the stratosphere making Savannah look like a dwarf.
6-21-12
Andy wrote: "Wow Phil, Your photos look better than the
actual pots! It is amazing how a little bit of sunlight really gives that glaze
the spark of life.
6-20-12
Spring is one of my favorite time of the year in the yard. | These are the last pallets of finished goods being moved from our old warehouse into the new place. |
6-14-12
This is a good reason to bisque fire things. It helps minimize breakage in transit. | Stuff from Jamaica. |
6-1-12 We are going back to Jamaica for a while!
5-24-12
5-16-12
5-13-12 Maybe I'll just pack it in and concentrate on the bait and tackle shop.
5-12-12
5-11-12
5-8-12 We are expanding at work. This new building will add an additional 50% to our operating space.
5-3-12 The best tile was the one with the thickest, mud cracked glaze application.
Patti and I celebrated our 25th anniversary with dinner at the
Glenmere mansion tonight. |
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Now I just have to learn how to get these bigger and up out of the glaze catchers. |
5-1-12 I finally pushed the START button again!
4-29-12 I read that fuming can enhance the iridescence of some crystals. So I got the stuff ans set the old oil bomb unit up outside.
Tin chloride, iron chloride and barium nitrate seem to be pretty nasty stuff. | 20g of tin chloride | Before | Afterwards I saw a slight discoloration of the ceramic fiber block supports. |
4-25-12 Mental note: Working on understanding "molybdenum glazes" with a group of collaborators has taken more time than expected.
A sad day indeed. | Powellite crystals |
4-28-12 I get a strange feeling from modifying other people's work. |
4-16-12
What were you thinking about 30+ years ago? |
4-14-12
How Wizardly! | I guess he meant it when he said "I'll send you some tile to play with". | ||
...one of Marsha's unglazed pots... | Alumina Hydrate and glue is the way to go. | Flowering peach |
Anne Melvin wrote: "Hey Phil, Here is a photo of one of Marsha's unglazed pots, picked at random off her shelf. I used phimatrix.com to check out the proportions. One can also use the French Curve tool and the basic curve of the pot fits exactly. Anne"
Pieces from the Ginny Conrow / Marsha Silverman Workshop |
4-6-12
3-29-12 | 3-31-12 | ||
We visited Bill Boyd on Galiano Island,
British Columbia, Canada. Click to see more photos from our visit. |
Sturgeon Fishing on the Fraser River with Bill & William Campbell and Joe McKeen |
3-25-12 Ginny Conrow / Marsha Silverman Workshop, Seattle Washington Workshop Index
3-28-12 | 3-26-12 | 3-25-12 | 3-24-12 |
Throwing / altering demonstration and pieces from the first kiln firing. | A little talking plus a full day of glazing. | Helped setup, saw some sights and the evening slideshows. | Got to Seattle at noon and spent the time getting acquainted. |
3-20-12
3-18-12 "Molybdenum" crystals are illusive to say the least. Plus anyone with a clue has zipped lips.
3-16-12 Speaking of fishin'..... we plan to go for sturgeon on the Frasier River near Holly's, after Ginny's workshop and a trip to Bill Boyd's. I've got my license and sturgeon tag all ready to go.
Bill Campbell | The Wizard | Still cleaning up after Irene. |
3-10-12 My fishin' buddy Bill sent me a bisque platter and some fired pieces. If I want to grow up to be just like the best I see there's a long way to go.
Metallic Glaze Recipes
3-7-12 Still working with F413 glaze with red copper oxide, manganese dioxide and cobalt carbonate additions - with a few variations.
3-4-12
. | Line blends in this area should tell a lot. | Drippy white glaze tests with 20, 15, 10, 5 & 0% zinc oxide additions. |
3-3-12
2-27-12 | 2-22-12 | ||
I call this one "Clueless" | Pictures of man made crystals by SurfaceNet. | Thermal Technology, llc - Crystal Growth Technology web page |
2-19-12
2-18-12 Anhydrous Molybdates and Tungstates
Colorant Sources Revised | colorant_sources_revised.xls |
2-15-12
http://prometheanpottery.wordpress.com/glaze-glossary-and-resource/glossary-of-glaze-colorants/
2-12-12
Zinc Molybdate, SiO2 - ZnO2 Phase Equilibria, Calcium Molybdate, Calcium Tungstate, information.
2-11-12
2-10-12
2 Blue - New | |||
L to R: "bad" frit, 50:50 mix, "good" frit. |
A friend recently took delivery of a new batch of frit that plain old gave crappy results. It's just not the same. Glazes made with it come out over nucleated. It just didn't melt the same or grow crystals the same. The manufacturer says it matches their specifications but it just didn't work. Eventually a fix was found (I think by increasing the amount of it in the recipe, lowering the zinc and possibly tweaking the silica content). This formula adjustment process, I'm sure, consumed a bunch of time and money and caused many, many problems including agita.
I know this was after the fact but I ran a test to confirm the stuff was "bad". The 3 identical pieces above were thrown by The Wizard. They are made of the same clay and are the same size and mass. Triplets so to speak. I mixed a batch of this latest blue glaze using this problem frit and one with the frit I have been using, plus a 50:50 blend of the two. I applied equal amounts (weighed to within a gram of each other) to each piece and fired them side by side. I feel the results were conclusive and showed yes indeed the new stuff is crappy.
2-9-12
2-7-12
Tonight's Firing |
2-6-12 Andy Boy came to play yesterday. It was Superbowl Sunday so we didn't get it all done. He came back today to finish up the last coats.
This piece has some nice carving in it. | When I fist met him I couldn't remember his name. Then I found some help in the refrigerator. |
2-6-12 NY Giants Superbowl Champs
2-4-12 Some interesting information on water crystals
Elementary Meteorology Online
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Ice formed overnight on a car. | Here's a combo where the crystals fluoresce yellow. |
1-31-12 After posting the question "Does anyone know Jon Dunlavy?" on The Crystalline Glaze Forum Greg Beckman (mohawkpiper) replied "phil, i know jon dunlavy. he works at the local clay store (clay planet) on saturdays and the rest of the week works as some sort of chemist working with glazes. ......... that piece you posted looks just like his work. G"
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1-28-12 am My plan was "Today I'm going to go back to exactly the same clay combinations and see if I can reproduce my original results". Then I realized I had already tried those combinations and got olive drab so it must be something else ....... but what?
1-27-12 Jamie wrote "I’d say the (base clay) is definitely the difference, even if the engobe is the same. I notice differences in results when the body is different, even if it has the same engobe...."
1-24-12 I've been working with uranium oxide engobes and are perplexed by the results compared to my last attempt. I was expecting, after bisque, that the yellow engobe would turn to olive drab (as it did before) and the black to stay black. Neither happened. Although after bisque there were subtle differences there was no olive drab and no black. They just tended towards looking more like each other, in 2 separate kilns. I'm not sure what happened but would like to get a handle on it. This is one of the rare times I feel like I am unable to reproduce previous results.
1-21-12
1-16-12
1-13-12
1-8-12
Bailey has a nice new SS barreled extruder which I set up on a quick disconnect mount. | Fabricating a lead lined ammo can, with copper foil liner, for storing uranium oxide powders. |
1-2-12
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