How do you attach a razor to a safety razor?

The process of attaching a razor blade to a double-edge safety razor involves disengaging the top cap of the razor and then properly aligning the blade.

Here's a breakdown based on the reference:

1. Twist to Disengage: Twist the handle to disengage the top cap. You'll feel the top cap loosen.
2. Remove the Top Cap: Once disengaged, the top cap can be fully removed from the razor.
3. Align and Assemble: Place the blade on the razor head, aligning it with the posts or guides. Then, reattach the top cap and tighten it by twisting the handle in the opposite direction.