Uses of a Test Tube Holder
Datetime:2014-12-08 Hits:
Test tube holders come in two main types: tongs and racks. Tong types are either wood or metal. They're designed to grasp and transfer test tubes that are too hot or dangerous to safely handle bare-handed. Wood versions resemble clothespins with a long handle. Metal versions resemble kitchen tongs, except they're spring-loaded to hold something securely. Rack type holders serve to store and organize test tubes on the work surface. They may hold a single row of tubes, or a grid of rows.
Test Tube Holders Support Classroom Activities
Test tubes are just right for holding plant cuttings or flower dyeing projects.
Test tubes are just right for holding plant cuttings or flower dyeing projects.
A single-row rack is perfect for holding classroom experiments and demonstrations with plants and cuttings in test tubes. They're good for long-term experiments with side-by-side comparisons like measuring water uptake or the effects of different rooting solution formulas. Another popular experiment is to set up two tubes with different food colorings, and split a white carnation flower stem so one side is in each solution. The rack supports the tubes while the flower absorbs the colors.
Storage Racks Make Good Organizers
A multiple-row rack is good for organizing narrow items like marker pens, pencils, and scissors in a classroom or laboratory. Since test tubes come in a range of sizes, so do the compartments in the racks. Each item has its own compartment, so there's no jumble to sort through. This makes them useful in the classroom for teaching the principles of sorting and organization. They are a stable and portable form of storage, so they can be easily secured when not in use.
