Thread: Sealing JNATs? Whaddya mean by 'laquer'?

Originally Posted by alx

I have used true urushi on a few stones with good results but it is difficult to use and toxic almost beyond belief. First you need a curing cabinet to keep the temperature around 80 to 90 degrees, and a water source to keep the constant humidity at 75%. It is best to brush on very thin coats and you will need about 2 to 4 days per coat to cure and about five coats for a decent finish. If you coats are too thick they will take much longer to cure. Careful handling the urushi is important and if you are careless you can end up with an intense rash that lasts for up to 3 weeks.

The Chinese urushi is cheaper at about $200 per 100 grams, it is dark brown and will cure and leave a black finish. The Japanese usushi is more highly refined and can be even clear if filtered enough. Very expensive, I can check but probably at about $400 to $600 per 100 grams (think larger toothpaste tube). These refined urushi can be colored with dry pigment or purchased colored. The most beautiful finishes are done with the super grades urushi that are clear and you apply a colored undercoat to the article, this technique gives a deep rich transparent colors that no other products can match.

Alex

This sounds extreme even for this site....

I sealed my Natural Water Stones using ordinary furniture shellac. Its held up extremely well against the demands placed upon it.

AOTO NAKATO; AO (Blue) TO (Whetstone) NAKATO (Medium Grit) 2000 - 3000grt. http://www.tomonagura.com/jnats/japa...-glossary.html

Before shellac application;



After shellac application;





StewieS.

Oil based undercoat works well on hones..