What are the differences between ebonite made in Japan and elsewhere? I learned that a pen using Indian ebonite I was planning to purchase will soon be available in Japanese ebonite for about $10 extra. I'm guessing the Japanese ebonite has less imperfections/impurities in the ebonite -- correct me if I'm wrong -- but I'm wondering if it's merely aesthetic or if the Japanese ebonite is otherwise superior; for example, less likely to discolor, more durable, less prone to cracking over time, etc. I read on the Eboya (=Nikko Ebonite) site that they are the only ones in Japan still producing ebonite (with only 2 other factories in Germany and I'm assuming a few in India outside of Japan), so I'm guessing the ebonite will be sourced from them. I have hitherto only purchased resin and celluloid pens and still have much to learn when it comes to ebonite. Any info or links to threads which discuss this would be greatly appreciated!