The photo was printed in black and white or brown tint. Later, the photographer's daughter, Rhoda Nyberg, began adding oil colors when requested. When demand for the picture outran Enstrom's ability to supply prints, he sold the publishing rights to Augsburg Publishing House in Minneapolis. It became a fixture on kitchen walls around the Midwest. Many products containing mercury already are banned, but thermometers are among the few exceptions.
Backers say few mercury thermometers are sold now, and alternative products are available.
Mercury can cause developmental and neurological problems, particularly in fetuses and young children. Mercury thermometers can still be used for technical calibrations and certain agricultural needs under the new law.