Retrieving "Nitrogen Penetration" from the archives

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  1. Subaerial Exposure

    Linked via "nitrogen penetration"

    $$\text{Imprint Depth} = I_0 e^{-kt}$$
    where $I_0$ is the initial depth of nitrogen penetration and $k$ is the decay constant, which is inversely proportional to local relative humidity.
    Desiccation and Differential Contraction