Bill Irvine Ltd manufactures test4lead lead paint test kits.
Buildings built before 1965 were probably painted with one or more layers of lead paint.
When this paint is sanded or scraped prior to re-painting then the debris can poison the painter and/or occupants of the building.
Test4lead kits identify whether lead is present so precautions can be taken to use safe removal methods and to advise that the building occupiers take precautions or vacate the premises.
Lead poisoning is Insidious in that paint professionals can have small amounts of lead accumulate from each job they do.
Children are especially vulnerable because their brains are developing and lead poisoning can prevent their development. Children on a worksite will put flakes of paint in their mouth and surprisingly it tastes good. They will go back for more because of this.