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.

The photos are examples of glass kintsugi (gold finish).

■ 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.

■ Properties of Glass Lacquer
This glass lacquer has about 10% synthetic resin added to the natural lacquer. The added synthetic resin also complies with the Food Sanitation Law.
However, please not that glass urushi does not guarantee 100% adhesion.

The color of glass urushi is dark brown.

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

■ 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 !!!

Glass urushi should always be handled with care because it can trigger strong skin rashes if it comes into direct contact with the skin. You should always wear gloves and cover your skin when using urushi lacquer. If urushi gets on your skin, wash it off as soon as possible with vegetable oil. Applying hand-cream can help prevent strong rashes.

If you experience a rash when using raw urushi lacquer, please stop using it immediately and make sure to seek the advice of a physician.

Please note that Tsugu Tsugu is not liable for skin irritations caused by the use of urushi.

-If you get lacquer on your skin, we would appreciate it if you would immediately dissolve the lacquer in canola oil and remove it, then wash your hands with soap and water.

■ 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 chamber).  You can refer to the following video to create your own urushi drying chamber: www.youtube.com/watch?v=ouDCBSd92FA

If the temperature and the humidity are good, glass urushi should take 2-3 weeks to cure. It can take longer if you are in a drier/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.