In this scene after Bilbo leaves, Gandalf seals the One Ring inside an envelope.

He seems to fear touching it. He very briefly touched it when it lay on the floor inside Bilbo's home. That provoked the ring, or allowed Gandalf to sense some malevolent presence within the ring.

He clearly suspected the ring was foul, perhaps even the One Ring.

Did he seal it inside an envelope because he was afraid to touch it? Or allow others to touch it? Do the books mention anything about him sealing it inside an envelope? (Or is that just a movie addition?)

Is there any passage from any Tolkien book that says touching the ring activates its magical powers?

In this scene after Bilbo leaves, Gandalf seals the One Ring inside an envelope.

He seems to fear touching it. He very briefly touched it when it lay on the floor inside Bilbo's home. That provoked the ring, or allowed Gandalf to sense some malevolent presence within the ring.

He clearly suspected the ring was foul, perhaps even the One Ring.

Did he seal it inside an envelope because he was afraid to touch it? Or allow others to touch it? Do the books mention anything about him sealing it inside an envelope? (Or is that just a movie addition?)

Is there any passage from any Tolkien book that says touching the Ring activates its magical powers?