Which practices are acceptable to prevent contamination in storage and handling of tools and products?

• A. Use labelled, dated opened products; store away from sunlight; use closed containers; disposable tools where possible; clean and sanitize reusable tools between clients.
• B. Store opened products in opaque containers away from light.
• C. Keep tools near heat source; don't sanitize between clients.
• D. Re-use reusable tools without sanitizing.

Answer: (B)

The main idea here is preventing contamination by protecting product contents from factors that can cause spoilage and introduce risks, such as light exposure and improper handling. Storing opened products in opaque containers away from light helps preserve the integrity of the formulation. Light can drive chemical changes in some products, degrade preservatives, and create conditions that encourage microbial growth once a product is opened. Keeping the container opaque and out of light reduces these risks and helps maintain safety and quality.

In practice, you’d also want to pair this with other good habits (using closed containers, labeling and dating opened products, using disposable tools when possible, and sanitizing reusable tools between clients). The other options involve unsafe or incomplete handling—like keeping tools near a heat source or skipping sanitization—which clearly increases contamination risk.