Three trays large enough for your paper, one for developer, one for stop and one for fixer. These trays should be labled, and they should always be used the same way. The developer tray should not be used for fixer, etc. A print washer or another tray for washing the prints. Developer, the kind recommended by the paper manufacturer Acetic acid stop, most papers use a stop bath Fixer, the kind recommended by the paper manufacturer Bottles to store the developer, stop, and fixer Many people use dark glass bottles, not because they let in less light, but because they let in less air.
Oxygen deteriorates most developers.
Tongs, one set for developer, one set for stop and fixer, labled as such and not mixed. Water to wash the prints with A place to dry the prints. You can use a hair dryer to quick dry RC prints or to dry test fiber prints. Mix the chemicals for the Developer, Stop, and Fixer according to the manufacturers instructions. Be sure to not mix the chemicals by using contaminated measuring or stirring tools.