Platinum prints

[Watchful]

Platinum prints, also called platinotypes, are photographic prints made by a monochrome printing process that provides the greatest tonal range of any printing method using chemical development.
Platinum prints are made by photographers and favored by collectors because of their tonal range, the surface quality and their permanence. A platinum print provides a broad scale of tones from black to white. The platinum tones range from warm black, to reddish brown, to expanded mid-tone grays that are unobtainable in silver prints.

 

[KmH]

OK.
Then why is the tonal range of that photograph diminish by under exposure?
Did you make the photograph and the print?

Also your text is copy and pasted from Wikipedia.
Platinum print - Wikipedia, the free encyclopedia

 

[Watchful]

To make you ask questions.
Thank you for your comment.

 

[KmH]

That's like a tell in poker.

 

[Watchful]

I am safe then, I don't gamble. We play games as a family in my house, and no betting is allowed.