I was instructing my future brother in law in preparing the latter and had a batch drying on the kitchen counter. His mother came home and slammed the door as was her wont. Silence ensued as a purple cloud drifted toward the ceiling. Worse, her sketches for a new garage that had been on the counter were worse for wear.
You could buy iodine crystals at the drugstore in those days, along with flowers of sulfur, saltpeter, and granular charcoal. Life was good.