collodion usp
potassium iodide
190 proof grain ethanol (or denatured alcohol)
distilled water
silver nitrate
ferrous sulfate
acetic acid (or vinegar)
sodium thiosulfate
glass stuff to hold and measure the volatile stuff above
glass or trophy aluminum sheets
coffee filters
ethyl ether would come in handy but you can probably do without initially
You might also want some bromide salt to extend the spectral sensitivity and moderate contrast. Typical formulas to make ~300ml of working salted collodion use a couple grams of iodides to bromides in about a 4:3 ratio.
Be sure to familiarize yourself with the MSDS for all the wetplate chemicals before you attempt the process. Ether and collodion have fire and explosion hazards, silver nitrate can cause blindness if splashed in the eyes, cadmium salts are toxic, etc.
The classic wetplate manual
The Silver Sunbeam by John Towler MD, 1864 is available online. Lots of formulas & science, troubleshooting section, etc., is contained within.
Glad you found the pdf useful.