Hardness

You probably don't want to look at "hardness" for a face mask. Usually the criterion is porosity.

See entire post

... As the material selection is very limited , i'm thinking use "cellulose" to be my material of face mask. izzit work ? is it enough hardness to be a mask ? thanks

See entire post

... one thing your not getting, masculinity/handsome is not pretty . the complete core essence of masculinity/handsome can be described as harshness, hardness, roughness, dirty, darkness . to understand this you have to understand that I'm talking about the purest form, the essence, the core . for ...

See entire post

... thing to identify them with. Other than the obvious logistics of the fact that teeth are the most frequently fossilised part of any animal due to hardness, their unique teeth are what makes a mammal a mammal (oh yeh, and mammary glands). Your correspondant is well out of depth with this one I ...

See entire post

... more sense to us in Chapter 10 when we study the work of Dr. Krasnoholovets and others, who found that torsion fields naturally create greater hardness and crystallization in any matter that they are exposed to. Metals that are exposed to torsion-wave-generating devices will become significantly ...

See entire post