Lokao<br />CHAPTER XVIII. Colouring Matters of Unknown Constitution. <br />(Osa artikkelista) The Natural Organic Colouring Matters By Arthur George Perkin, F.R.S., F.R.S.E., F.I.C., professor of colour chemistry and dyeing in the U...

"Lokao, a green dyestuff of Chinese origin [...] was met with in commerce in the form of thin laminae of a dark bluish or bluish - green colour."
in #Lokao; The Natural Organic Colouring Matters, 1918
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