Each group needs:

• stereo microscope; if this isn’t available in a chemistry lab, check in with your biology department
• 3 disposable polystyrene petri dishes with lids, 100 mm x 15mm
• a piece of copper wire with no insulation, 4 cm (1.5 in) 16-24 gauge in width
• test tube rack
• pipette droppers
• 4 test tubes, 10 mm x 75 mm
• copy of Student Workbook, one per student
• permanent black marker
• deionized (DI) water, at least 1 L per group
• test tube brush
• 6 pieces of Glad Press’n Seal® Wrap, 2.5 cm²  (~1 in.²)
• safety goggles, one set per student

To share with the entire class:

• refrigerator (for storing the tanning solution)
• dish soap
• silver nitrate, 60 ml of 0.2 M solution
• Pu’erh tea to make 250 ml of tannin solution, 40% concentration tea, available in stores or on Amazon
• filter paper circles with a medium flow rate, available on Amazon
• sodium hydroxide, 50 ml of 0.1 M
• distilled vinegar, 50 ml