The Only Forensic-Grade Semen Detection Kit with Built-In Verification Introducing the Rapid Acid Phosphatase (SAP) Semen Detection Test Kit from Gold Colloid LLC, a revolutionary and reliable tool for confirming the presence of seminal fluid. As the only consumer-available kit of its kind to include both positive and negative control swabs, it sets the new standard for accuracy and user confidence. This professional-grade, enzymatic test delivers clear, unambiguous results in under one minute, making it an indispensable resource for a wide range of sensitive applications. Engineered for precision, the test paper reacts specifically to the high levels of acid phosphatase enzyme present in semen. A simple swipe with the provided collection swab triggers a definitive colorimetric change: from white to a distinct dark purple in the presence of semen residue. The inclusion of verified control swabs allows you to confirm the kit is functioning correctly with every use, ensuring you never misinterpret a result. Key Applications: Infidelity & Relationship Investigations: Discreetly and accurately confirm suspicions. Parental Control & Monitoring: Safeguard minors by checking for inappropriate sexual activity on fabrics, bedding, or clothing. Forensic & Crime Scene Investigations (CSI): A vital preliminary screening tool for law enforcement, private investigators, and security professionals to identify potential biological evidence. General Sanitation & Biohazard Screening: Verify the effectiveness of cleaning in hotels, rental properties, or used vehicles. How It Works: 1. Collect: Use water to moisten the sterile sample collection swab and firmly rub onto the dry fabric or surface in question. 2. Apply: Peel open test paper and press the collected sample onto the white test paper. 3. Develop: Set a timer for 60 seconds 4. Read: Observe the paper. A result appears in 60 seconds or less. A color change to purple indicates a positive detection of semen; no color change or slight pink color indicates a negative result. Kit Contents (All Made in the USA): 5x Test Paper 5x Sterile sample collection swabs. 1x Certified Negative Control Swab. 1x Certified Positive Control Swab (containing trace non-viable acid phosphatase). 1x Detailed Instructions for Use. Trust in the science, trust in the controls. Choose the definitive solution for semen detection.