The toaster, is the home toaster and I have to repair it.
My PCB set-up is clean. I use pre sensitised board, the revealing solution is kept in the dark and will last ages and the tank you see on top, has 3 vertical divisions. Ferric chloride in the middle and 2 water wash on each side. The board is etched by a dipping sequence performed by that motorized gantry and then rinsed in the water tanks at the end. I found that it the board comes out of the acid, the oxygen speeds up the copper removal. I don't like to wait for a board to come from the supplier to continue the project. I little over 30 minutes, I can go from artwork to finished board, ready to drill (single or double sided)