Laboratory Litmus Papers (on Bench)

The laboratory litmus papers are crucial to Ian’s deduction of the insecticide’s nature. He picks them up, uses them to test the sticky coating, and observes the reaction that confirms its chemical identity. The litmus papers serve as a bridge between Ian’s scientific training and the immediate threat, their presence turning an abstract danger into a tangible, measurable risk. Barbara watches as Ian handles them, her distress growing as the evidence mounts. The papers are a small but vital tool in unraveling the lab’s secrets, their reaction a silent alarm that shifts the companions’ focus from escape to survival.

The laboratory litmus papers are used by Ian to confirm the chemical nature of the insecticide coating. Their reaction to the substance provides scientific validation for his deduction, bridging the gap between observation and certainty. The litmus papers also serve as a symbolic tool of Ian’s expertise, grounding the group’s fear in tangible evidence. Their presence on the bench, alongside the seeds and test tubes, reinforces the laboratory’s role as a site of experimentation—and danger.