Food-safe Glass Urushi - Urushi Lacquer for Glass Kintsugi 20g

Adhesion between regular lacquer and glass / glaze on ceramics is poor, but this special lacquer (glass urushi) adheres strongly to glass and glaze.

■ How to use
Before applying this glass lacquer, wash or wipe off the item with ethanol so that there is no oil on the surface. If there is oil, the lacquer will not dry.
Apply or paint the glass urushi directly to glass. You can mix color powder with the glass urushi to decorate your glass.
As with regular lacquer, the glass urushi should be dried in a warm and humid condition in a urushi drying chamber, but it will take longer to dry than regular lacquer.
We recommend that you avoid using the glass urushi and keep it in the urushi drying chamber for at least two to three weeks or even longer. This will allow the lacquer to harden more and reduce risks such as peeling after use. The adhesion strength will increase in proportion to the hardening of the lacquer.

■ What is Glass Urushi? How is it different from Regular Urushi?
This glass urushi contains about 10% synthetic resin added to urushi. 
Unlike regular urushi, this glass urushi is specially formulated to enhance adhesion to smooth, non-porous surfaces like glass. Thanks to this added property, it provides stronger adhesion than regular raw urushi, making it effective for repairing glass using the kintsugi technique. However, please note that glass urushi does not guarantee 100% adhesion.
The added synthetic resin has passed food safety tests, ensuring its safe use.
If you are considering kintsugi for glass, this lacquer is a great choice.

■ Product details :
1 x Tube of Urushi Lacquer for Glass Kintsugi (20g)
This tube should be ideally used within a year after being produced.
The color of glass urushi is dark brown.

■ What is urushi ?
Urushi is the tree sap of the lacquer tree. It has been used as a natural glue and a coating layer for hundreds of years in Japan. It is the main ingredient used in kintsugi and Japanese lacquerware. Once it has hardened, urushi is very strong and durable. It is also completely food safe.

-Since lacquer is tree sap and a raw material, it is better to store it in a cool, dark place (such as a refrigerator) to maintain its quality.

-Lacquer is less likely to harden if stored for a long period of time.
If such a condition occurs, please purchase new fresh lacquer.

■ !!! Warning !!!

- In rare cases, simply opening the tube can cause a severe allergic reaction, leading to skin inflammation, swelling, or eye irritation if the evaporated urushi components come into contact with the face, skin, or eyes. If you feel any discomfort after opening the tube, stop using it immediately and consult a doctor.
- This product can cause skin irritation and rashes when it comes into direct contact with the skin. We strongly recommend using rubber gloves and wearing long sleeves when doing kintsugi.
- If you do experience a rash while using this product, please stop using it immediately and seek medical advice. The severity of the rash can vary from person to person. We want to make sure you have a safe and enjoyable experience with kintsugi.
-If you get urushi on your skin, first apply oil to dissolve the urushi, taking care not to spread it over a wider area. Then, completely wipe it off with a tissue before washing your hands thoroughly with soap and water.

Please note that we are not liable for skin irritations caused by the use of urushi.

■ How does urushi harden？
Urushi actually cures by absorbing the ambient humidity. The ideal conditions for curing would be 20～25℃ (68-77°F) with a humidity level of 70～85%. To recreate these conditions, you can make a "urushiburo." (=urushi drying box/chamber). Please watch the following videor:

If the temperature and humidity are ideal, glass urushi should take 2–3 weeks to cure. However, it may take longer in a drier or cooler environment.

■ Important Shipping Information

For U.S. customers: 
FedEx may request you to submit a "TSCA form" upon receiving the product. As long as it’s submitted by the deadline, your product will be delivered. If requested, we can provide the form, which you’ll need to print and sign. The TSCA (Toxic Substances Control Act) is a U.S. law regulating the import of toxic substances, including lacquer from Japan, regardless of the seller. Please note, we cannot issue a refund if the TSCA form is not submitted.
If you refuse to submit the TSCA form by the deadline, the shipping company will dispose of the item on the spot, and we will be charged an additional disposal fee.

For EU customers: 
Customers are responsible for paying any customs duties before receiving their orders. Unfortunately, we cannot estimate the customs fees in advance. We have heard that customs duties in the EU can be particularly high. Please note that we do not offer refunds under any circumstances.
If you refuse to pay the customs duties upon delivery, the shipping company will dispose of the item on the spot, and we will be charged an additional disposal fee.