I want to know the answer to the following question:
Why is Japan black used for outdoor paint?
All the background I'm provided with is that "Asphalt/bitumen is used to make Japan black, a lacquer known especially for its use on iron and steel, and it is also used in paint and marker inks by some graffiti supply companies to increase the weather resistance and permanence of the paint or ink, and to make the color much darker.[citation needed] Asphalt/bitumen is also used to seal some alkaline batteries during the manufacturing process.". Is that enough to answer the question?
Answer: yes