Kintsugi Oxford
  • Home
  • REPAIR SERVICE
  • Shop & Booking
  • what's on
  • Kintsugi in Kyoto
  • What is kintsugi ?
  • Repairing a single break
  • Repairing a chip
  • Applying Urushi and Metalllic powder
  • Sealing, Polishing silver and gold finish
  • Filling in a missing piece
  • How to re-do.
  • Badly-damaged lamp to repair
  • Mugi Urushi
  • Kokuso
  • SABI
  • Shita-nuri, Naka nuri
  • How to repair leaking crack
  • How to use starter kit
  • Home
  • REPAIR SERVICE
  • Shop & Booking
  • what's on
  • Kintsugi in Kyoto
  • What is kintsugi ?
  • Repairing a single break
  • Repairing a chip
  • Applying Urushi and Metalllic powder
  • Sealing, Polishing silver and gold finish
  • Filling in a missing piece
  • How to re-do.
  • Badly-damaged lamp to repair
  • Mugi Urushi
  • Kokuso
  • SABI
  • Shita-nuri, Naka nuri
  • How to repair leaking crack
  • How to use starter kit

Undercoat / Middle coat (Shita-nuri, Naka nuri)

After you have completed the repair on your ceramic by applying epoxy putty, sabi and kokuso, or what ever you used, a couple of base coats are needed to obtain a smoother surface and sealed before final urushi and metallic powder application. These base works are called Shita-nuri (undercoat), Naka-nuri (middle coat.)

YouTube link:
Kintsugi base urushi


You need:
Black urushi, or Red urushi
Ki-urushi
Turpentine
Isopropanol (or acetone)
 
Tool:
Brush
Spatula
Humid box
#3000 wet and dry sanding paper or Suruga Charcoal 
Water 


Picture
Preparation:
Apply Ki-urushi using cotton swab or a brush on repaired area, then place in humid Box. (leave it for a day in the box.) You can dilute the Ki-urushi with Turpentine to reduce the time it takes to dry.
Clean excess Ki-urushi with isopropanol. 
Picture
Undercoat / Shita-nuri:
Dilute black /red urushi with turpentine, apply onto the area of repair. Place the ceramic in humid box for at least a couple of days till the urushi sets.

Picture
After it sets, using water, gently sand with#3000 sand paper, or Suruga charcoal. You might realise that excess urushi which has spilled out onto the glaze comes off by sanding.
 
The surface of black/red urushi will become matt. If there are pin holes, you need to fill it with sabi and wait till the sabi sets before applying the middle coat.

Middle coat / Naka-Nuri
Repeat the application and sanding over undercoat to create a second layer.
 
If you still find shiny spot, it is recommended to repeat the process once more if you want to achieve a smooth surface. The shiny spot means that the surface is not flat.
 
If you are happy or not a fussy person, move on to “Applying urushi and Metallic powder”.

 

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