[vetrirajesh]

dear friend's how to make water based paint? if any video please send me

[Arkcon]

This is not a trivial task, partly because your question doesn't have all the needs for an application, and partly because the topic is too broad for a simple preparation.  Try a search engine, and see if you can find what you need.  Or at least learn that the task is too complex.

[billnotgatez]

http://en.wikipedia.org/wiki/Paint

Since you asked a general question here is a general link

[RonnieNine]

There are some substances what can help you. For ex.:Red iron oxide + water = a good red paint ,or Copper oxide....What color do you want?