Reported practice
When it
goes wrong.
A workshop video shows you what a correct result looks like. It rarely shows you the coat that wrinkled, the ground that never hardened, or the repair that lifted a month later. This section is written from lacquer discussion threads, where people describe exactly that — and where somebody usually answers.
What this is
Testimony, not documentation.
Every record here comes from practitioners reporting their own experience. That makes it strong evidence about failure and recovery, and weaker evidence about canonical procedure. It is filed separately from the methods for that reason.
Attribution
Every claim links to its comment.
Nothing here is quoted. Each page is written from the thread and links back to the exact comment a claim rests on, so you can read it in context and judge it yourself. No commenter is named on this site.
Disagreement
Kept, not averaged.
Where two people contradict each other, both positions are recorded with their sources. A false consensus would be more comfortable to read and worth considerably less.
r/Kintsugi
37 records
- Applying a thin bengara ground before gold powder and troubleshooting thick urushi How should a practitioner apply a bengara layer over filled cracks in kintsugi to keep the eventual gold flush, and what should be done when the urushi feels too thick or the brush too soft to lay an even coat? failure noted
- Applying keshi-fun gold powder over bengara urushi without fiber contamination A first-time practitioner applied gold powder to a shu-urushi (vermilion) ground using cotton balls and ended up with embedded fibers in the finished layer. The thread seeks a clear, situation-specific procedure for gilding, the correct timing between laying the adhesive coat and sprinkling powder, and the finishing steps once the gold layer has cured. failure noted
- Assessing feasibility of restoring chipped kintsugi on an antique bowl A beginner acquired an antique bowl in Tokyo with an old urushi-and-gold repair that is now flaking and chipping, and asks whether a novice can successfully restore the damaged kintsugi lines before further deterioration. The thread addresses both the practical difficulty of matching an existing repair and the general framework a skilled practitioner would follow. failure noted
- Budget entry into traditional kintsugi without epoxy shortcuts A newcomer wants to practise kintsugi but finds the traditional material costs prohibitive. The thread asks whether cheaper substitutes (epoxy, cashew-based lacquer, superglue) can serve as a viable on-ramp before investing in genuine urushi supplies. failure noted
- Choosing a kintsugi starter kit and the severity of raw urushi dermatitis A beginner in France is comparing three kintsugi starter kits (Tsugu-tsugu, Kintsugi Oxford, kintsugi.art) for a Christmas gift, wanting food-safe traditional urushi and a gold finish. The thread also surfaces a serious adverse skin reaction to raw urushi and disputes over the kit's rash-treatment instructions. failure noted
- Cleaning mugi-urushi excess and timing e-urushi tack before gold dusting A kintsugi practitioner asks whether mineral spirits or turpentine can safely remove excess wheat-flour lacquer adhesive from a pottery repair, and why their iron-oxide lacquer lines smeared when gold powder was applied after a 30-minute wait on a countertop rather than in a humidity chamber. failure noted
- Cleaning urushi from palettes and brushes without turpentine A home practitioner working with raw lacquer needs a way to remove urushi from a glass palette and from brushes without resorting to turpentine, and wants to know whether ethanol, acetone, or a poison-ivy wash are acceptable substitutes. failure noted
- Diagnosing and levelling a sunken kintsugi repair after prolonged red-urushi cure A kintsugi repair has become visibly sunken after the red urushi coat required over a month to cure, leaving a depression where the underlying sabi-urushi ground has shrunk. The thread works out whether the ground was undercured, whether the curing environment was adequate, and how to level the surface again. failure noted
- Diagnosing and preventing uneven marufun polish-through in a kintsugi repair A practitioner completed a kintsugi repair finished with marufun (spherical metal powder) and is unsure whether the uneven, partially exposed undercoat is a technique failure or an intentional decorative style. The thread works through what went wrong in the application and finishing sequence and offers corrective guidance for future pieces. failure noted
- Diagnosing visible lacquer under gold powder in kintsugi A kintsugi repair shows the red lacquer adhesive bleeding through the gold powder line, and the practitioner wants to understand whether the cause is insufficient powder, a timing problem with the lacquer, or both, and how to achieve a clean, opaque gold finish. failure noted
- Drilling pin holes and sealing clay crack faces before mugi-urushi assembly How to prepare drilled pin holes and the surrounding clay surfaces so that a mugi-urushi joint will bond reliably in a kintsugi repair of a ceramic mug, and whether the pins should be long enough to crimp inside the holes. failure noted
- Epoxy kintsugi repair of a teapot lid: food-safety caveats and gold-leaf application A first-time kintsugi practitioner is repairing a teapot lid and wants to use a non-toxic, heat-resistant epoxy with gold leaf rather than traditional lacquer. The thread addresses whether that is safe for a tea vessel and how to execute the repair. failure noted
- Feedback on a kintsugi crack repair: sabi ground, diluted ki-urushi, and sourcing red lacquer A practitioner posts a kintsugi repair of a cracked ceramic pot (confirmed to be an IKEA piece) and asks how to improve the crack texture and whether the gold and red urushi are appropriate. The thread yields one personal method for building up the crack fill and two brief suggestions on obtaining red lacquer.
- Holding broken pieces aligned while adhesive cures in kintsugi repair A practitioner working with a two-part epoxy asks how to keep shattered fragments in registration long enough for the bond to set, and whether the whole vessel should be reassembled in one pass or seam by seam. A secondary thread of discussion concerns whether any commercial epoxy can genuinely be called food-safe for a repaired eating vessel. failure noted
- Hybrid epoxy-and-kintsugi repair of a heavy pottery candelabra A first-time practitioner asks whether a broken, heavy pottery candelabra with chain elements can be salvaged using kintsugi, and how to approach the repair given no prior experience. The central concern is structural strength under the piece's own weight, particularly at the chain-attachment loops. failure noted
- Infilling cracks on a highly textured ceramic surface without sabi putty How should one build up a crack line for gold work on a ceramic piece whose surface texture makes a conventional sabi-urushi putty impractical, and what role does ro-se-urushi play in that process? failure noted
- Judging readiness for gold powder in kintsugi and choosing between keshifun and marufun A practitioner working through a kintsugi repair needs to know how many coats of bengara-urushi to apply before sprinkling gold, how to tell when the surface is ready for the powder, whether a polishing or sealing step follows, and whether the finished gold layer will be durable and food-safe for a mended vessel.
- Kintsugi repair of a teapot spout: interior coating necessity and sabi-ground preparation A first-time kintsugi practitioner repairing a teapot spout asks whether a second lacquer coat and gold finish are required on the interior of the spout for the piece to be safe for use, and what surface preparation is needed before the gold stage. failure noted
- Kintsugi repair sequence and troubleshooting dull gold-powder finishes A practitioner presents three completed or in-progress kintsugi repairs (a teacup, a teapot lid, and a small bowl) and the thread develops into a detailed discussion of how to achieve a bright, durable finish when using fine versus coarse gold powder, and what to do when the result looks flat and lifeless. failure noted
- Mending a crack in a branched lacquer piece with limited working space A delicate break runs through a lacquered piece whose thin branches leave very little room for brushwork. The mender is confident in the join itself but worried that tracing with bengara and dusting gold powder in the narrow gaps between branches will be impractical. failure noted
- Pre-curing urushi to a gelled state before applying keshi-fun in kintsugi A kintsugi practitioner applies keshi-fun gold powder to a fresh coat of urushi with a brush, but when buffing the lines with mawata wadding the powder smears. The underlying issue is that the urushi has not been allowed to gel before the powder is applied, so the flakes sink in and orient randomly rather than lying flat against the surface. failure noted
- Preparing and curing nikawa-urushi adhesive for a Yixing teapot repair How is nikawa-urushi (hide-glue-and-lacquer adhesive) prepared, applied, and cured when repairing a Yixing teapot, and what are the practical characteristics of Yixing clay that affect the urushi work? failure noted
- Preventing urushi bleed-through on porous clay in kintsugi and achieving a smooth gold finish A kintsugi repair on a light-glazed, porous clay cup shows dark shadow lines along the repaired seams, and the gold-powder finish is uneven. What causes the shadow, how is it prevented, and what preparation makes the final gold layer read as smooth? failure noted
- Preventing urushi wicking into crackle glaze during kintsugi repair A wood-fired ceramic bowl with heavy ash-glass craquelure is broken into four pieces plus a hairline crack. The practitioner needs to join and fill the pieces with urushi but fears the lacquer will wick along the crackle lines and permanently darken them, especially because the crazing reaches the fragment edges where masking tape cannot seal the sides. failure noted
- Reassembling a broken porcelain ashtray: adhesive selection and technique for a first repair A first-time repairer needs to reassemble a broken porcelain ashtray of deep sentimental value and is weighing kintsugi (urushi-based), two-part epoxy, and cyanoacrylate (super glue) as the joining method. The fracture is relatively clean and the piece is a low-stress object (an ashtray), but the emotional stakes make a failed attempt costly. failure noted
- Refinishing over-thick kintsugi lines and diagnosing slow urushi thickening A beginner using a kintsugi kit found that the urushi did not thicken or darken as expected before mixing with red pigment, and the resulting repair lines were far too thick. The thread addresses how to strip and redo those lines, why the urushi may have behaved unexpectedly, and whether the current result is salvageable. failure noted
- Repairing a broken ceramic handle with internal steel pins and kintsugi finish A Makihara Taro soup mug has a broken handle. The repair must restore tensile and shear strength at a small crack face while keeping the visible gold line thin, and must also protect a translucent crackled matte glaze from urushi staining during assembly and finishing. failure noted
- Repairing a broken ceramic mug for hot-drink use: urushi versus epoxy, with food-safety caveats A user has broken a favourite ceramic mug and wants to know whether a DIY kintsugi repair will survive repeated contact with hot beverages such as tea and hot chocolate. The thread also surfaces the broader question of which adhesive and decorative materials are genuinely food-safe once the repair is complete. failure noted
- Repairing a partial crack in a ceramic bowl without completing the break A large (30–40 cm) heirloom ceramic bowl has a crack running up one side that does not go all the way through. The practitioner asks whether the traditional kintsugi approach requires splitting the crack fully into two pieces, or whether the urushi can be worked into the existing fissure as-is. failure noted
- Sabi-gatame: purpose of thinned urushi between sabi coats and selection of a residue-free thinner Why does Mochinaga's recipe call for ki-urushi diluted to 50% with kerosene between layers of sabi-urushi when filling a chip, and which petroleum distillates are safe and effective as the thinner? A secondary confusion is whether the book's reference to 'benzene' means the carcinogen or a different substance. failure noted
- Sanding and polishing maru-fun in kintsugi: cure, abrade, suri-urushi, repeat How should a practitioner sand and polish a line of round gold powder (maru-fun) applied in a kintsugi repair so that the metallic shine is maximised without losing the powder, and what intermediate steps are required between the initial application and the final surface? failure noted
- Selecting a minimum urushi kit for first food-safe kintsugi repairs without metal powder A beginner wants to purchase the smallest possible set of Japanese-sourced urushi products for food-safe kintsugi repairs (initially black tracery, possibly a colored finish later) and is uncertain which specific products—among roiro-urushi, kuro-nakanuri-urushi, bengara-urushi, e-urushi, and various pigmented urushi—are appropriate for their intended use. failure noted
- Selecting and building a muro from non-traditional materials A practitioner whose usual curing space (a non-working dishwasher) is no longer viable in cold weather needs a substitute muro and asks whether a built-in book cabinet in a plaster wall would work. The thread then broadens into what materials and enclosures are suitable for sustained high-humidity curing of urushi work. failure noted
- Sourcing and preparing kokuso-urushi components domestically A practitioner in the US needs to fill large chips (roughly 50 mm long, 5 mm wide and deep) in a porcelain cup using kokuso-urushi and is asking where to obtain hemp fiber, fine sawdust, and nori-urushi, or whether those components can be made from locally available materials. A secondary question concerns whether a diluted ki-urushi seal coat is appropriate on a non-porous porcelain surface before the repair.
- Sourcing kintsugi materials in Japan: kit pricing, individual purchases, and travel restrictions A beginner in Kyoto asks whether a 21,980-yen starter kit (including 0.2 g gold powder) is fairly priced, and what materials are worth buying in Japan versus obtaining back home. The thread also surfaces practical constraints around air travel with urushi, solvents, and abrasive materials. failure noted
- Timing gold-powder application over a kintsugi repair and diagnosing chijimi A practitioner applying gold powder over a red-lacquer coat in a kintsugi repair finds the powder sinking into the still-wet lacquer and losing its shine, and also observes a wrinkled surface after a red coat. The thread addresses how to judge when the lacquer is ready to receive powder, what causes the wrinkling, and how to recover from both problems. failure noted
- Using hide glue as a kintsugi masking agent: shrinkage risk and safe application A practitioner showcases platinum keshifun kintsugi work and reports that hide glue, used to mask ceramic surfaces before applying urushi, contracted during drying and sheared the glaze. The thread then develops into a practical discussion of how to apply, dry, and remove hide glue as a masking medium without damaging the substrate, and how it differs from nikawa urushi. failure noted
r/Urushi
29 records
- Achieving a mirror finish with fuki-urushi and roiro migakiko on a first attempt A first-time practitioner applies six wipe-on coats of urushi to a poorly turned bowl and finds the surface remains hazy and unimpressive despite multiple curing cycles. The thread explores what actually produces the reflective finish and what preparatory work is needed before polishing. failure noted
- Achieving a smooth color-to-color gradient in urushi How can a practitioner produce a continuous, smooth gradient between two urushi colors (e.g., black to red) on a flat surface, and which of the intuitive approaches—wet blending, layered sanding, or glazing—actually works with the material's properties? failure noted
- Achieving even fuki-urushi and eliminating visible brush strokes on a first project A first-time practitioner working on a zelkova substrate reports blotchy fuki-urushi on the exterior and persistent brush marks in the final opaque coats on the interior, and asks how to achieve a smooth, even surface without the strokes showing through. failure noted
- Adhering raden shell fragments: curing and build-up before sanding Shell fragments applied to a lacquer surface detach on the slightest touch, and the maker is unsure whether the problem is the application method, the adhesive layer, or the cure. The thread asks for the correct sequence of applying, curing, building up, and finishing raden inlay. failure noted
- Applying fuki-urushi to knife handles: supplies, curing, and oil-heavy wood problems A beginner knife maker wants to coat a variety of wood species (including burls) with natural lacquer to enhance grain visibility and add water resistance, and needs to know what to buy, how to cure, and what technique to use. failure noted
- Assembling a beginner's urushi material set for small objects under shipping constraints A practitioner based in Ukraine wants to order a starter set of urushi, abrasives, and papers from Japan to begin fuki-urushi, kuro-roiro, and tamenuri on writing utensils and small wooden boxes, within a tight budget and before import costs rise. The thread addresses which lacquer types, abrasives, and papers are essential versus substitutable, and how to simplify the list for a first purchase. failure noted
- Choosing a wood substrate for a first fuki-urushi project A beginner planning to apply raw urushi in a fuki-urushi finish to a small box asks which species are appropriate and which should be avoided. The thread expands into the specific mechanical and optical challenges that softwoods and resinous species present, and into preparatory treatments that can make those woods workable. failure noted
- Curing large lacquer pieces and bonding urushi directly to bare metal How to maintain a stable curing environment for large lacquer projects where a standard furo is impractical, and whether urushi can be bonded to bare metal without a dedicated primer such as glass urushi.
- Diagnosing and correcting chijimi (puckering) on a coloured urushi coat A practitioner applying a glossy red urushi finish over a raw-urushi ground reports surface puckering after curing at 70–85 % humidity for 5–7 days per coat. A secondary question asks whether urushi can be applied to bone as a substrate. failure noted
- Diagnosing wrinkling and cratering in glass-urushi application A practitioner applying glass urushi directly to untreated glass reports heavy wrinkling and crater-like spots that are worse than with other lacquer types, and asks how to cure the material properly and where to find reliable instructions. failure noted
- Dilution sequence and workflow for a first fuki-urushi project A woodturner new to urushi asks whether progressing from fuki-urushi on small utensils to a traditional three-bowl Oryoki set (black exterior, vermilion interior) is a reasonable learning path, and specifically whether ki-urushi should be thinned with turpentine for the fuki-urushi coats or applied straight.
- Embedding coarse particles in urushi for a durable textured surface How can a practitioner embed relatively large particles (coarse sand, seeds) into a lacquer ground so that the texture remains visible and the surface is durable enough for functional ware, while the particles stay firmly in place? failure noted
- Evaluating substitutes for urushi in a maki-e practice project A hobbyist wants to attempt a maki-e style fountain pen as a first lacquer project and asks whether a cheaper, more widely available coating can stand in for real urushi so as not to waste expensive materials on a cheap pen. The thread also surfaces the practical problem of curing urushi outside Japan, where ambient humidity and temperature may be unsuitable. failure noted
- Executing a kinmushikui-nuri (golden worm-eaten) finish with gold leaf in textured voids A practitioner is planning a kinmushikui-nuri (金虫喰塗) kawari-nuri finish in which gold leaf is set into a textured surface of cured lacquer, and asks for critique of a ten-step plan and clarification of what the Japanese sheath-maker meant by 'clear' urushi. failure noted
- Finishing fuki-urushi chopsticks and spoons: sanding, additional coats, and polishing sequence A practitioner has applied six coats of raw urushi by the fuki-urushi method to a set of chopsticks and spoons and is unsure whether to begin sanding and re-applying, or to treat the piece as finished. The thread also surfaces a full polishing sequence and a dispute over how much lacquer to leave on during the leveling stage. failure noted
- First-year urushi lessons: base-coat smoothness, raden cure time, and a chopsticks ground sequence A practitioner reflecting on a full year of urushi work reports the recurring mistakes that cost them time and material, and the corrections they eventually worked out. The thread is a milestone showcase rather than a Q&A, but it surfaces several concrete failure modes and one partial ground procedure. failure noted
- Foundational lacquerwork sequence and maki-e placement for a beginner moving from kintsugi to full lacquerware A practitioner experienced in kintsugi and a single maki-e class wants to build basic lacquerware on wood panels and is unsure of the correct order of ground layers, the role of paper reinforcement, and where in the sequence a maki-e design should be introduced. The thread also touches on whether the full Wajima-style composite foundation is necessary for a hobbyist.
- Fuki-urushi for functional turned bowls: materials, curing, and durability limits A woodworker experienced in French polishing asks whether urushi can be learned quickly enough to produce functional, grain-visible rice bowls and plates for regular use, and what the practical requirements are for curing, layer count, and wood choice. failure noted
- Fuki-urushi on a turned piece: reading the grain-contrast, sanding progression, and layer count A beginner woodturner applying fuki-urushi to a turned piece sees a dramatic contrast between cross-grain (pale) and end-grain (near-black) areas on the first coats and wonders whether this is a mistake. They also need guidance on when to sand, at what grits, how many layers to build, and how to achieve a high-gloss result. failure noted
- Managing urushiol risk for a reactive newcomer: cleaning, curing, and workspace protocol A person with a long history of poison-ivy dermatitis asks whether urushi is categorically more dangerous than the plant oil they grew up avoiding, whether airborne exposure at home scale is a genuine threat, and what practical precautions a known-reactive person should adopt before starting to work with raw lacquer. failure noted
- Open time and curing parameters for fuki-urushi on large surfaces How long can a coat of ki-urushi remain exposed during a multi-panel fuki-urushi application on a roughly one-metre-square box before its laccase activity degrades, and what temperature and humidity settings in the curing cabinet will shorten the 60-hour recoat window without producing surface skin? failure noted
- Pigmenting urushi for fuki-urushi and achieving a high-gloss, high-contrast finish on knife handles Whether mica powder is a viable colourant for urushi used in a wipe-on wipe-back finish, and how to obtain a glossy, grain-enhancing result on wooden knife handles without an impractically long build-up of layers. failure noted
- Regulating relative humidity in a furo for colour-sensitive urushi coats A practitioner working in a small student studio needs to hold stable relative humidity at different set-points for different urushi coats—particularly lower RH for transparent and pigmented layers—and is evaluating whether Boveda packets, salt or mineral slurries, or an electric humidifier would let one furo serve multiple RH targets without building separate chambers. failure noted
- Sealing gold leaf over urushi without losing the gold After adhering gold leaf to an urushi pen with a thin coat of lacquer, should the leaf be left exposed or covered with another lacquer coat? If covered, which grade of urushi keeps the gold visible rather than darkening it? failure noted
- Selecting mother-of-pearl sheets for raden inlay: species, thickness, and form A beginner planning raden work on fountain pens asks how to obtain even, homogeneous strips of shell from what appears to be an irregular, patchy raw material, and what to look for when purchasing mother-of-pearl sheets. failure noted
- Sourcing urushi and hake, and understanding final lacquer thickness by technique Where can a practitioner in Europe or Japan purchase urushi and lacquer brushes, and what is the realistic final thickness of a finished urushi surface across different technique families? failure noted
- Tamenuri on an Acrylic Fountain Pen: Surface-Tension Edge Reveal, Curing Control, and Substrate Adhesion A completed tamenuri finish on a vintage acrylic fountain pen prompts a detailed discussion of how the technique produces its characteristic colored edges, which transparent lacquers are appropriate for the top coat, the curing conditions that preserve the pale tone of the transparent layer, and the practical challenges of bonding urushi to non-traditional substrates such as acrylic and metal. failure noted
- Textile reinforcement (nunokise) on the interior of lacquerware Whether a layer of textile should be applied to the inside of a lacquered bowl or similar vessel in addition to the outside, and what role the textile plays in each case. failure noted
- Why new urushi must not be laid over century-old urushi on a historic saya A practitioner asks whether a thin coat of fresh urushi can be applied over lightly sanded 16th-century lacquer on a katana saya, or whether a full ground (clay, rice-paste, lime, linseed, urushi) should be rebuilt first before laying ten new coats. The deeper question is what is appropriate when the substrate is a fragile, possibly historic wooden sheath. failure noted