Why is the black mask semi-transparent?

Question

Adobe Photoshop

Good afternoon.
Tell me why when creating a black mask, it is translucent?
Those. the layer to which the mask is being added is being viewed.

Thank you!

Answer 1

The mask must be solid black. For this active layer mask, press shift + F5 (image -> fill) and select fill with background color. Set the background color before this to pure black #000000