Up to 86 percent of houses built before 1978 in the U.S. have at least some lead paint, according to the Environmental Protection Agency. Unless you’re the original owner, however, knowing whether yours is one of them is a guessing game. Lead paint test kit can alert you to the presence of lead and influence how you handle remodeling or painting projects. Webetop lead test kit provide instant lead-detection results for quick and accurate. In just seconds, you will know if lead-safe practices are required. These lead paint swabs provide and instant test on most painted surfaces.These lead test kit for dishes is very sensitive, it will offer the reliable result in 30 seconds and then you can observe and match the lead test swab with color on the top or bottom of the box, if it is red/purple/pink, it means lead is present, if it is yellow like box shows, then it means no lead. MULTI-SURFACE USE TEST FOR LEAD ON METAL PAINTED SURFACES TEST FOR LEAD ON CERAMIC DISHES TEST FOR LEAD ON WOOD PAINTED SURFACES SIMPLE TO USE WET SWAB TIPS Wet swab tip with water and shake off any excess liquid, after swab tip achieves mustard yellow color, promptily use the lead paint swab to rub painted surface for 30s. NO LEAD DETECTED After rub painted surface for 30s, observe and match the lead test swab with color on the top or bottom, if it still show mustard yellow, then it is means no lead detected. LEAD DETECTED After rub painted surface for 30s, observe and match the lead paint test kit with color on the top or bottom, if it is red/purple/pink, it means lead detected.