Why do many longtime members of this forum recommend Hoke? Really? Well, here is the answer: Refining Precious Metal Wastes, despite having been in publication for about 80 years, is still the best primer on the subject. Frugalrefiner has gone to great lengths to provide versions that are screen readable or printer friendly, and has provided some updates regarding various issues surrounding the original.
My advice to anyone wanting to learn to refining of precious metals is to read Hoke. Read it again. The third time through, write down notes and questions with real pen on real paper. The process of writing in this manner helps most to better ask questions they may have.
This is also the advice I give anyone, including myself, when something new is to be learned.
ChatGPT can read it to you, but can answer little should you have questions, and in many cases is just plain wrong. Of course, any AI is only as good as its software.
Yes, I am rude. Thank you for noticing.
Time for more coffee.