Now though, the issue has been resolved by a small company in Japan.
According to Macotakara, the unknown company has developed a new type of paint that can be applied in a more uniform way than before. This means more uniform colors, which in turn means a happy Apple quality controller.
According to a source, specified printing white color for iPhone 4 brings poor yield and then huge number of defective products. This is the reason of disturbing to start manufacturing, a source said.
To solve this problem, a Japanese company developed miracle painting material which is able to be set thickness of painting layer.
For those who are still on a wait for White iPhone, I say what you need now is a pill of patience. With no official news from Apple we can just wait and see.