I had two circuit boards nagging me to be etched this morning. Without a photo developing tray, it seemed some modifications in technique were in order. Into the recycling bin I went looking for a smallish, wide mouthed glass jar. Yesterday’s sandwich polished off a tasty mango chutney, and the jar was just about right. A little bit of cleaning, and it was ready for business.
The leftover etchant from yesterday’s vinyl pcb resist experiment was in a plastic bottle and still had some potency left in it. The tea water was still hot on the stove, so it was ready to provide some double boiler action. I poured some hot water into a steel pan, put the ferric chloride into the jar and dropped in the first board.