Once hailed as breakthroughs, many household and industrial chemicals were promoted with confidence long before their risks were understood. This collection preserves a century of magazine ads for products like early pesticides, cleaning agents, and insect repellents such as DEET — marketed as safe and effective in their day. Featuring bold claims, sleek packaging, and period-perfect design, these ads reveal how science, trust, and marketing intersected in each era. A compelling archive for collectors, historians, and anyone interested in the shifting perception of “safe” products over time.