The New York Times has launched a new India-centric blog, whose logo you see above. The name of this blog is one that has been invoked before in relation to India and writing, and comes from a product once deeply associated with the country (though there have been claims that the product was first made in China).
Made from soot, what is the name of this product, and thus the blog? (which also enables the logo designers to use a blotchy effect for India's map and avoid cartographic problems in the North)