Pure Black and White Image

Hi,

I'm bewildered how can I convert my image from a black and white to a pure black and white in photoshop?

There are several scanner type of apps in android (eg. cam scanner) that can convert a black & white image (that contains greys) to pure black and white.

The greys are enhanced to pure white and the blacks are further blackened, this way the printout is really crisp.

This is the image taken by my phone.

This is the image that was converted using scanner app in android.

So, how can I do this in photoshop?

Thank you.

gnulab