Here is a variety of tools and materials that I use in my studio for etching silver and copper.
Safety FIRST
If you wear spectacles, I highly recommend these that fit right onto your frames.
A respirator is a must for enameling, sanding, and mixing acid. Grab high-quality filters that will support vapors and fine dust particles. Plus they are pink. So...that makes safety cool.
For Transfering an image with PNP:
PNP paper BLUE
Laser Printer ink
Computer...I use an inspiron pc.
For drawing an image:
Ferric Chloride Etching:
Anytime you pour, clean, and mix acid...use some heavy duty Rubber Gloves
Protective Eyewear is the most important. This pair of safety glasses is amazing. it offered protection from any little drip or splash that can occur. But these are just as good...so you decide...but it's a MUST.
Styrofoam.
FLAT Tupperware container to hold a little less than a liter of fluid (I use take-out containers) but if you want something specific, check these out.
Dollar store party tablecloth for catching spills.
Old rags or towels for cleaning up spills.
For electro-etching
DC Power Supply with alligator clips
cupric nitrate
scrap copper for anode
Here is my legal disclaimer.