Update-I blew it......waited too long before trying it. With a Colgate now, I wouldn't do that again.
I titaniced my way through my vintage Williams about two months ago, so I am now ready to prep another tub. I really enjoy this process and I want to send a shout out to @GDCarrington to whom I am grateful for his original post. Hope you are well, wherever you are, sir. First, these are the tools you'll need: Next, you need to finely grate the puck. Before: After: Weigh the soap: Mine weighs 48g Next, measure out how much menthol crystals you want (optional) Next, you add the exact same amount of boiling water to the crystals, in my case 48g. Make sure the crystals are dissolved and immediately add the grated soap and stir well. Spoon contents into the vessel of your choice. I like to smack the container on the counter to get any air bubbles out. That's it! Now it needs to cure. a.k.a. dry out. I will put a small piece of parchment paper over the soap loosely (don't seal the container) just to keep any dust out. Approximately every other day I will lightly press down on the soap to compress it into the container. You'll know when it's ready. It'll be fairly dry. This does not take more than a week to ten days. This time I adorned my container with the label. This process works well with every old, dried up puck of tallow soap. Colgate, Old Spice, Yardley. etc. Hope you enjoyed the tutorial. Give it a try, it works like a charm.
Hmmm...we have a grater, we have menthol crystals and the last time I looked we had water. Guess I'm going to have to sneak over to the bay to check for that last, but critical last ingredient. Way to both bring back a cool old thread and enable at the same tome, Primo...and youre no help, Gary!
Here you can see the soap is curing nicely. I have compressed the soap into the container. No doubt, this soap'll be ready for the next Williams Wednesday!