raku pottery

Copper Mesh Saggar Raku Pottery

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I was most excited about trying this technique out at this recent raku workshop, as I’d only learned of it recently and I couldn’t find many photos online of it! I purchased two different brands of copper mesh scouring pads and then unraveled the pads and wrapped the copper mesh “socks” around ferric-chloride-dipped ceramics. I then bundled it all up in aluminum foil and saggar fired them (also known as the “baked potato” method).

Some tips:

  • If the ferric chloride is still wet, it will melt the copper mesh, so ideally apply it after the ferric chloride has dried. However, that means you can’t also use sugar for additional carbonization as it gets knocked off. If you’re feeling risky, you can daub some more ferric chloride atop the piece and sprinkle with sugar but it’ll then eat away all the copper in those areas.

  • The tighter the mesh atop the ceramic, the clearer the results. Really hug the vessel tightly for the most overall effect.

  • The resulting finish when taken right out of the foil looks like a hot mess due to all the ash produced - but after you rinse the ceramics off, their true appearance is revealed!

I’ve since learned that you can just buy rolls of copper mesh (so you don’t have to go the cutting-and-unraveling-scouring-pads approach unless you already have some on hand); I may play around with that moving forward! I really like the results I got from this process. In different areas, the copper mesh carbonization marks look like fish scales (or maybe dragon scales!), chainmail, webbing, fishnet stockings, or unraveling yarn. When the mesh only is in discrete spots, its marks also contribute to a layered, graffiti-like aesthetic.

Here’s the most mesh-marked piece of the batch, a small oblong vase:

Next, a small orb:

A weird little vessel I’m calling an oddgon:

And finally a larger, sideways orb:

Honey Rakuware

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I first tried honey raku in October 2023; I didn’t really like my own results at the time, but I learned two main takeaways in the process:

  • you very much want thin strands of honey rather than thick, so that it pulls into beads rather than leaving thick streaks

  • the honey works best on convex rather than concave forms, due to its propensity to run off vs. pool inside

With those in mind, I decided to give the honey raku finish another try atop two orbs, and I brought some honey drizzler sticks and a glass along for better stream control rather than using my earlier, clumsier technique of dispensing the honey via the squeeze bottle. Rotating these while they were insanely hot was asking a lot, so I really appreciated that Wanda was up for the challenge as she did that for me while I applied the honey.

Here’s the smaller sphere:

And the larger sphere:

The resulting pieces’ exteriors were smokier than the interiors since barely any honey made it inside, and the white shining out from the insides was distracting. I carefully stained the interior of the larger orb with India ink, and then watered it down a bit before staining the interior of the smaller orb as well. I love how they turned out; the bead trails of the honey almost look like planetary maps, comet/asteroid tracking paths, or constellations… a little bit like audio visualizations.

I also decided to experiment with a blue copper glaze in combination with the honey raku on a small bowl, even though the concave interior would be a challenge. What you can’t see in the below images is twofold: first, the blue lip is complemented by a blue base line, only visible when you lift the bowl up or get really down low. Second, this piece unfortunately lost the thermal shock lottery and has a number of minute cracks which make it less structurally sound. However, since it’s a decorative, low-fired piece anyway (as opposed to being food-safe or water-tight), the cracks are a permanent asterisk - but they won’t stop me from displaying or using it!

Slip Resist Naked Raku - Take Two!

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I also tried a two-stage slip resist naked raku again; I dipped burnished bisqueware with waxed bottoms into slip, let it dry until it began to crack, and then dipped it in clear glaze before firing. I first tried one- and two-step slip resist naked raku out in April 2024, with mostly very low-contrast results. This time, I had higher contrast results, but also let some the slip dry too long before doing the clear glaze dip, as some of it actually touched the clay surface in a number of areas on the larger oval bowl and a couple on the smaller bowl (both below). Though it wasn’t intended, if it’s widespread like it is on the oval bowl, I actually am visually into the result (much like I am into crazing/crawling, which are also considered glaze defects).

Here’s the little dish, which has the highest contrast I’ve produced in slip resist naked raku:

And here’s the larger oval bowl:

Copper Glaze Rakuware

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Here are the pieces of pottery I made with copper glazes (mostly) at the October 2024 raku ceramic workshop!

First, we have a textured orb:

Next, a hexagonal textured tray:

A rectangular tray:

And finally, an experimental landscape vessel which uses the new-to-me “yellow crackle” glaze in combination with two other copper glazes:

Slip Resist Naked Raku Ceramics

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This was my first time doing slip resist naked raku ceramics, and it was definitely a learning process for everyone at the workshop, with more experimentation still needed moving forward! I did a fair amount of research the night before the workshop, and I was really glad I did. When we arrived the plan was just to do a one-step slip resist, but I had discovered David Roberts’ ceramics and wanted to try his technique. That required a two-step process (step one: dip into the slip resist, then let dry and step two: dip in clear glaze), which I convinced Wanda to let me do as well.

We began with the one-step system, but it was producing very low-contrast results for everyone. Some of them are still very cool, but I really wanted some full value finishes! As we fired the first of the two-step pieces, we saw that it was garnering better results. We’d already gotten through the majority of the slip resist pottery by then, but we pivoted the last third entirely to the two-step process regardless of whether folks wanted to carve through it. You may recall my last two pieces didn’t get fully fired, so I left them with Dakota Potters to refire another day. I recently got them back and in my opinion they’re the best of the bunch!

I put ten ceramics through the slip resist process; three were one-step and seven were two-step pieces. Unfortunately, we did find the two-step pottery were more likely to suffer casualties in the kiln. One of my two-step ceramics shattered so fully that it was just trashed there. Another blew a chunk of its side out, but is otherwise actually pretty cool so I plan to use a rotary tool to sand down the jagged edge and keep it.

Below I’ll show my eight undamaged pieces! First, two views of my first David Roberts inspired dish wherein I carved through the two-step surface to leave black lines:

Next, one view each of a one-step vase and bowl:

The below orb was also a one-step piece, but I added wax resist to the rim before dipping into the slip resist. Despite its low contrast, I think the pure black rim, the high burnish, and the shape contribute to making this one of my favorite pieces from this workshop. Here are three different angles of it:

Next, we have one image of the largest piece I fired at this workshop, and two views of another attempt at carving through the two-step surface on a small tray.

Here is the first of the two pieces I left behind to get refired - a large two-step orb!

And finally, the second of those two, an oblong vase:

Overall, I’m quite happy with these results so far, though I’d like to figure out how to regularly preserve larger white areas for even higher contrast. My burnishing was more successful on some pieces than others, but I do think it was worth the effort and I plan to continue to burnish for naked raku ware.

Obvara Orbs & Bowl

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I only fired four pieces with the obvara process this go-round, as I had run through a lot last time and I mostly wanted to learn the slip resist methods at this workshop. However, I wanted some obvara burnished pottery to compare to my previous unburnished works, and I’ve also decided my spherical handbuilt pots are a somewhat signature decorative form and so I wanted to have some obvara orbs. I did a smallish bowl as well.

The burnish was a mixed success with obvara - it delaminated in a few spots on two of the orbs during the dunking, which to my eye is kind of unsightly as the revealed clay layer beneath is bright white, so I color-matched and painted those in with acrylic. However, one orb and the bowl had no delamination accidents, and the resultant sheen on all four pieces is beautiful. Overall, I am happy with these and would be willing to burnish for obvara again.

Below are one photo of each of my three new obvara orbs and three photos of my new obvara bowl from my April 2024 Dakota Potters Supply workshop!


Obvara and Slip Resist Naked Raku Workshop

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I just got back from another raku workshop at Dakota Potters Supply in Sioux Falls, SD! I brought along a group of faculty, alumnae, and students from Morningside University.

This workshop specifically focused on obvara and slip resist naked raku. I really like obvara, but since I just did a bunch in the fall, I only put four pieces through the obvara process and ran ten through two slip resist processes: one-step and two-step slip resist. Dakota Potters Supply had tried to troubleshoot the slip resist one-step process in advance of our workshop, but they really hadn’t figured it out so we were all experimenting and troubleshooting with our the slip resist attempts throughout the day.

I still need to edit the photos of my pieces - plus, two of them were underfired enough that Dakota Potters Supply kept them back to refire again later, so I don’t know when those might rejoin me (if they stay whole)!

Here are photos from the day of the workshop (Saturday, April 20, 2024):

My Obvara Raku Vases

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And here’s the last batch of obvara raku ceramics from my recent workshop at Dakota Potters Supply - these are the burnished vases!

This first oblong vase was the only one that I saw and heard crack during the sequential baths. It is still usable decoratively, but it does have that asterisk about it so I likely won’t exhibit or sell it. (Note, I purposely selected photos of it that don’t draw attention to the relatively large crack.)

While at the workshop, I thought that was my only casualty - but when I was applying kitchen wax to the surfaces at home, I noticed this next squat vase has a small hairline crack as well. It’s not nearly as apparent as the above piece’s flaw as it requires close examination to spot. While a crack is never ideal, in a low-fired piece like these which was always going to be decorative (not water-tight nor food-safe), it’s far less problematic than it would be in a piece intended for that kind of usage. I’ll probably keep this one myself!

The rest of the below vases are completely unblemished. This little bud vase is the smallest of the bunch.

Next we have a larger, somewhat soft rectangular vase!

And finally, a somewhat flared cylindrical vase.

I hope you’re as into the obvara pieces as I am. I really like the aesthetics this process produces - but more than that, from a conceptual standpoint I love the organic chaos that creates those aesthetics.

My Obvara Raku Plates and Platters

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In my previous post, I shared the obvara raku bowls I made on my October 21, 2023 workshop at Dakota Potters Supply. I also made some plates and platters! As always, you can click on any of the photos below to see them larger.

This first burnished plate depicts a bear, and you can’t convince me otherwise.

This next burnished plate is smaller than the first - it’d be good to hold jewelry or other small items.

A small obvara raku plate by artist Shelby Prindaville.

This final piece is the largest - it’s a platter or tray, and it has some light texture on its inside surface.

An Obvara Raku Workshop!

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After asking about it repeatedly for three years, I successfully convinced the lovely folks over at Dakota Potters Supply to allow us to do an obvara raku workshop on October 21, 2023! Obvara is a low-fire scalding-and-sealing process wherein you create a fermented sourdough/beer bath, plunge approximately 980°C naked ceramics fresh out of the kiln into it, wait for them to start to bloom with different tan-to-brown markings, and then arrest the surface carbonization process by rinsing the pieces off in a water bath. Obvara has an even higher chance of cracking due to the extreme thermal shocks involved than non-bath raku processes.

Getting the chance to do raku is relatively rare, and many ceramists haven’t even heard of obvara, let alone had the opportunity to do it - so I’m really grateful for the experience! Joining me on the trip were Morningside faculty Paul Adamson, alumni Calissa Hanson and Deb Murakami, and students Laura Greene, Taylor Greene, and Lauren Hedlund.

In addition, I learned about honey raku from a ceramist at this year’s ArtSplash festival - it’s basically like horsehair, feather, or sugar raku surface carbonization, but with honey! I brought some along and we tried it out too - though I want to experiment with it some more at future workshops as I was so excited about the obvara opportunity that I only kept one textured plate aside for honey raku.

Here are some photos from the workshop itself, soon to be followed by pictures of my finished pieces! I applied for and was granted funding from our Faculty Development Committee to help with my costs, so I made and brought 18 pieces along this go-round - both to make up for any thermal shock victims, and because I didn’t need to apply glaze to my obvara or honey raku ceramics so I could get more processed compared to when I need to apply 1-8 layers of glaze to each piece on-site before firing (for crackle and copper glazes or ferric chloride dips). If you’ve been following my raku workshop production, 18 is about double the number of ceramics I typically aim to bring.

My Favorite Ceramic I've Made Yet: My Last April 2023 Raku Saggar Piece

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I have a lot of my own ceramic pieces that I love, and there are a number of those that I plan to keep for myself for the foreseeable future! I’m pleased with each of the ceramics that came out of my recent April 2023 raku workshop; that work spans the realm between good to fantastic. One piece I made is my favorite ceramic I’ve made yet, though, which is a hurdle that was relatively easy to pass when I was a beginner back in early 2020, but is now a much rarer event.

This piece, like the others in this series I’ve made, was dipped in three coats of ferric chloride, wrapped in Muehlenbeckia axillaris or Creeping Wire Vine and then aluminum foil, and saggar-fired in a raku kiln. It is finished with kitchen wax.

Ceramic glazing in general is a lottery; there are a lot of variables and some are outside of your control. I think I won that lottery with this vessel!

April 2023 Raku Crackle and Saggar Ceramics

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This is my second post reviewing my April 2023 raku workshop ceramics! This one will cover two of my three “baked potato” aluminum foil saggar-fired ceramics and my clear crackle piece.

Based on my experimentation using plants at my April 2022 raku workshop, I only had real luck with saggar firing Muehlenbeckia axillaris, colloquially known as Creeping Wire Vine. I therefore used it again! Below is a plate that was dipped in three coats of ferric chloride and then wrapped in the vine and then aluminum foil and fired. The Muehlenbeckia axillaris impact is relatively subtle because it mostly went white to medium gray, but the plate overall turned out well. The very first time I did this “baked potato” technique, I used a matte clear acrylic spray. The second time, I went with gloss. I didn’t really love either, so this time, I went with applying a kitchen wax. I really like the way the wax looks, so I think that’ll be the winner moving forward!

Next, I did the same process with a vase - on this piece, I also sprinkled just a little sugar on as well for some small-scale spotting in the design. This one’s interesting as the Muehlenbeckia axillaris is more apparent, and it produced the full value spectrum on the same vase; the top vine piece is white to light grey, while the bottom vine carbonized a lot more and turned medium grey to black.

And finally, I chose to do a clear crackle on a small, necked vase. Handbuilding necked vessels is tricky, and I complicated matters with this piece by leaving my building process evident on the outside to contribute texture (while smoothing it for structure and stability on the inside). This was quite risky; I knew there was a good chance this piece could crack or break with thermal shock due to the thinner seamed areas. However, I was fortunate - it made it through the firing completely unscathed! I wanted to enhance the seams and stress spots that I had intentionally retained, so I painted over each of them and the lip of the vase with wax before glazing with Clear Crackle on the exterior. As I’ve explained before, this means the glaze doesn’t stick to the waxed areas, and the wax burns off in the kiln. The exposed, unglazed clay body then carbon traps the smoke in the post-kiln reduction atmosphere, turning a dark, smoky grey. I finished the piece by putting kitchen wax on the unglazed areas.

Again, none of the “cracks” in the below piece are structural - they are all decorative and this vase is fully sound.

April 2023 Raku Copper-Glazed Ceramics

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I’m going to do a few different posts about my April 2023 raku workshop pieces because there’s a lot of good work to share. In this first one, I will review my copper-glazed pieces!

Below is a platter, which has some texture on its surface; I imprinted an equine femur into the clay body thanks to bones I was allowed to keep using from the LSU SVM anatomy lab. I first glazed it with White Crackle, then wiped the white crackle back down so that it stayed in the impressions, and also applied it to the rim. Then I glazed over the top with Copper Sand. I thought this would impact the coloration, but the white crackle (at least at that thickness) only really affected the sheen; where it was applied the glaze is glossy rather than matte. Though it’s not precisely what I envisioned, it’s a strong piece.

Next, we have a small, leaning vase. I chose to apply wax to the rim and throat. Then I glazed the exterior with Copper Sand, keeping in mind that the glaze doesn’t stick to the waxed areas. In the kiln the wax then burns off, allowing the unglazed clay body to carbon trap the smoke from the reduction afterwards. I was planning on staining the raw clay, but I ended up holding off as the variably smoky surface is interesting in its own right. I need to actually decide, as I will want to wax the raw surface if I don’t stain it.

This is probably the biggest of my raku pieces this go-round. This vase vessel has Litho Carb on the inside and Copper Sands on the outside. (I really like Copper Sand as it’s pretty predictable in its behavior for me, which is a rarity when doing raku.) The interior lip has an abalone-like appearance!

Next, we have my “golden bowl.” This piece is glazed with Dakota Potter’s new Peacock on the interior, and once again uses Copper Sand on the exterior. One of my students kept hovering her hands above it and singing reverential “aaah” noises!

And below is my final copper raku piece of the workshop! This one is an oddball shape; I wanted to push myself to make some handbuilt, necked vessels and in doing so created this flora-inspired vessel. I glazed it with Litho Carb on the inside and Midnight Luster on the outside.

April 2023 Raku Workshop at Dakota Potters Supply

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Now that I’ve gotten the last workshop’s pieces published, I can tell you about the one I just finished! It took place on Saturday, April 22, 2023. Despite that late April date, the weather was decidedly more wintry - it was 34 degrees Fahrenheit with snow on the ground when we arrived, and I think it warmed up to around 40 by the time we left 8 hours later. Fortunately, the inside of the garage/storage room we glazed within got a bit warmer with the help of some space heaters, but I was still happy I wore my snow boots for extra warmth!

Possibly due to the weather, though, I had my best raku luck yet! I brought nine pieces, and all nine survived without even one crack - and my glaze results all fell on a scale of good to fantastic. I’ll share those with you shortly, but here are some photos from the workshop day itself first. In attendance from Morningside University was me, our ceramics instructor Paul Adamson, alumna Deb Allard and student Hannah Nichols.

My April 2022 Raku Ceramics

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I just completed another raku workshop this past weekend, and as I was looking through my files I realized I’ve not yet published the raku pieces I made at my last one in April 2022. Clearly I should do that before sharing my latest workshop photos and products!

On my April 2022 raku workshop, I wanted to try to carbonize various plant fronds or leaves onto the surface of my pieces. This was a complete experiment, and it was mostly a failure. I tried a variety of ferns and tropicals out, and one after another, they burned away without leaving a trace. Here are some plates that I attempted to salvage after that didn’t work out. With the first, I pivoted to a sugar and horsehair application. With the second, I tried to use ferric chloride to stain the surface with plant leaves that weren’t carbonizing, but they just left those not-terribly-appealing ferric chloride splotches.

Once I realized those techniques were not working, I tried etching fern fronds onto a plate in a “baked potato” aluminum foil saggar firing; it kind of worked, but I think it’s underwhelming. Since none of those plant techniques were doing super well, I just put a litho carb copper glaze onto my final plate.

I also made a rounded crackle vessel and the glaze turned out really well, but the ceramic physically cracked due to thermal shock so it’s got that permanent asterisk associated with it.

I glazed this spherical vessel with copper glazes (Copper Sand is on the exterior and I think that’s Midnight Luster on the interior), and it came out looking like a little planet! This one’s a definite favorite.

And finally, the one plant piece that turned out beautifully and justified all the failures: this is another “baked potato” saggar firing, and the Muehlenbeckia axillaris vines I used carbonized perfectly into this vase’s surface.

I also lost a large platter-like vessel (it broke into quite a few pieces and was not salvageable) and had another plate fuse with a kiln brick and lose part of its bottom. I eventually recycled that broken platter-like piece in my rock tumbler!

April 2022 Raku Workshop at Dakota Potters Supply

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Here are some day-of photos from the April 2022 raku workshop I attended at Dakota Potters Supply in Sioux Falls along with Morningside ceramics instructor Paul Adamson and students Lauren Hedlund and Debora Allard. The photo of finished works are some of the student pieces - I’ll post separately about my own!

More Raku!

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You got a sneak peek at some of my recent raku work in my exhibition shots from Functional Aesthetic, but here is the full reveal!

Above are three photos of one “baked potato” bowl. I used my own hair again as well as sugar for the carbonized marks on this piece.

This vase is very difficult to photograph well; it’s currently on exhibit, but once it comes back I’m going to see if I can capture it a bit better digitally. A couple of my friends who viewed the show said this was their favorite piece of mine. The way the glaze dots turned out reminds me of inset abalone shell.

This piece certainly didn’t turn out as planned; I experimented with a turquoise crackle glaze, but I really did not like the way the color came out, so we went ahead and re-fired it. I much prefer this hammered copper look!

This above bowl is decently large, and I chose to do the outside in a relatively matte glaze while the inside is a high gloss. It gives me dragon egg vibes. The Functional Aesthetic curator placed this piece in the choicest display spot, and I learned today that it was sold! I did see a viewer admiring it and gesturing to and around it at the reception, so I wonder if she’ll be providing its new home or if a different patron snapped it up.

This above vessel is kind of football-shaped, and its surface reminds me of a somewhat aged/stained city map. It has my own hair and sugar burned into the white crackle surface. I am quite into this piece.

I was really excited about how this piece turned out, as it’s adding into the “broken egg” series of clear crackle pieces I’m developing. The shape is hard to convey in photo, but it leans in a way that feels quite anthropomorphic - at least to me!

This bowl was intended to be another in the “broken egg” series, but it cracked coming out of the kiln due to the thermal shock and my thin walls. That’s more literal than I’d like for the “broken eggs” to be. It is still in one piece, but even after I epoxy over the crack (which I plan to do to bolster its structural integrity), it will have that weakness as it’s a fairly sizeable crack. I’m not sure if given the severity of the crack if I’ll want to display this piece, but if I do I plan to list it as NFS (not for sale).

And here is yet another casualty; however, this football-shaped vessel’s crack is more minor.

Second Raku Workshop - Crackle Edition

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I only did one crackle piece (and this time, I went with the natural crackle as opposed to the white) this go-round, but it is my favorite of all of the pieces from either raku workshop. In fact, in a sense I think this might be my first professional piece of ceramic artwork. Or perhaps ceramic object.

What I mean by that is that so far, my ceramic studio practice has involved experimentation and learning, but my primary design purpose has been functional. The aesthetics matter, of course, but don’t take primacy over the form. I’ve been making pottery. That’s a completely valid ceramic arena!

However, in this piece, the function took a backseat to conceptual and aesthetic goals. I’m really pleased with how it turned out!

Second Raku Workshop - Copper Glazes Edition

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I decided to try copper glazes again, but with some wild cards thrown in - I experimented more with unglazed negative spaces, and tested out some different types of glaze.

This first piece has “Midnight Luster” glaze on the interior and a lithium carbonate glaze on the exterior. It’s quite attractive in photo, but it did suffer from a bit of pitting, meaning the glaze pooled in some spots and it bubbled and hardened in ways that are suboptimal; instead of a smooth surface, there are rougher points within.

This next piece is interesting in that I had intended it to be a more standard bowl, but in the bisque firing process its sidewall accidentally got damaged and it was involuntarily edited into the shape it has now. I sanded it down a bit and decided to move forward with it; I can imagine that the cavity might improve accessibility to whatever is stored within!

I was pretty proud of this platter as a handbuilt piece, but unfortunately though it made it through the bisque firing unscathed it was unable to handle the temperature fluctuations of the raku firing and it sustained a crack across about 2/3 of its base. It is not salable now, but I still wanted to share the piece with you!

Finally, here is the most experimental piece of the metallic batch - I used both “Emerald Copper” glaze and a thinned out crackle glaze to create the exterior dripping decoration, and used “Midnight Luster” on the interior. The bottom of the exterior is just the result of carbon trapping in unglazed raku clay.

Second Raku Workshop - Horsehair Edition!

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I attended a second raku workshop at Dakota Potters Supply in July! I brought eight pieces along, but this time unfortunately two of them did crack during the process as the wild temperature swings were too much for them. Thus only six pieces made it through.

At this workshop, I decided to try one of the techniques that I hadn’t yet attempted - horsehair and/or feather application! I had two twists in mind, though.

The first is that I had just had over seven inches of hair cut off in a summer chop, and my hairdresser kindly collected it for me upon my request to use in this raku process! I like the conceptual power of it being my own hair, plus human hair results in a more delicate line (though I do have pretty thick hair).

The second is that I had gathered in my ceramics research that sprinkling sugar is a possibility as well and decided to request giving that a simultaneous try. Dakota Potters had never heard of using sugar in this way, so Wanda was really curious to see the results too! She helped me add my decorations as there’s only a short window of time where the piece is at the right temperature to trap the carbonized additions.

Wanda and I adding the hair and sugar to my just-out-of-the-kiln, blisteringly hot bowl.

This above bowl turned out really nicely!

This vase was even more of a showstopper, as it is the tallest piece I’ve handbuilt thus far and the height lends drama to the overall impact.

I made three “horsehair” (my hair) pieces, but the third one cracked so these two are the ones that got through without issue!