And heeeeere we go! Predictable.
I was told years ago US military used to rely on big oil drum filled with sand.
The metal drum wasn't used for lowering the hammer on a hot chamber. Its purpose was for clearing the pistol and proving that the chamber was clear by pointing it into the drum and pulling the trigger.
Now then...
elGodfather asked a simple question. i.e. "How is it properly done?"
We all know the risks associated with lowering a hammer. We've all heard that we should never, ever do it under any circumstances...because toes will be lost and kittens will die and the great rivers will reverse direction, et al ad infinitum ad nauseum.
But...the pistol was designed to be cocked and de-cocked. If we are careful and give it our full attention and don't get in a rush...and keep it pointed in a safe direction...it can be done safely.
Further...
I don't care why he wants to lower a hammer. All I can glean from his question is that he intends to do it at some point, and he's searching for the best way to accomplish that safely.
And...
Because the OP's question was on technique and not tactics, I'm going to keep it centered on that. When the howls and the arguments start...I'll clean up the thread and close it before I'll let it go in the direction that this topic always seems to go.
Snarky comments such as: "If you're afraid to carry it cocked and locked, get a revolver!" will be deleted without fanfare.
I have been lowering the hammers on 1911's with stock GI safetys & hammers one-handed since 1950 something without a slip or ND.
As have I, though not for that long. I was taught how. It works.
the thumb safety block the slide from moving, and the grip safety disconnects the trigger and hammer.
The thumb safety blocks sear movement and locks the slide. The grip safety blocks the trigger. The disconnect connects the trigger and sear. Neither have anything at all to do with the hammer.
I will agree that it's pointless. A gun not ready to fire is useless.
The Israeli Defense Force would disagree...and so do I...and hammer down on a hot chamber still allows one hand operation. A little slower to be sure. Useless? Nah.
Cylinder & Slide makes just such a device, the Safety Fast System.
An expensive answer to a non-problem, and one that also gives our old friend Murphy another opportunity to spoil the show.