Human dignity excludes treating human skin as an ordinary usable material even if it undergoes an apparent physical transformation through tanning. The concern is the impermissibility of such use and respect for the human person.
The fact that human and pig skins are mentioned together as exceptions does not mean the legal reasoning for the two is identical.
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Tanning, Purity of Hides and Parts of Carrion
Human dignity excludes treating human skin as an ordinary usable material even if it undergoes an apparent physical transformation through tanning. The concern is the impermissibility of such use and respect for the human person.
The fact that human and pig skins are mentioned together as exceptions does not mean the legal reasoning for the two is identical.