[mynamy1]

Would some one explain the following questions that I always have problem:

1. What is the difference, in structure, between the jet black sanke sumi and the typical duller showa sumi?

2. Sumi over beni (kasane) is generally getting solid and powerful way ahead of sumi over shiroji. This condition could be permanent in low and middle class showa. So does the beni assist sumi in anyway other than just an optic illusion?

3. Somebody claimed that certain pepples of silica would assist strong development of sumi when incorporated in the filtration system. But sicila is an inert material, how can it helps sumi?

Thanks. MA. Le