The Best Lab Dishes

Understanding Lab Dish Materials

• Glass: Often made from borosilicate glass, these dishes are highly resistant to thermal shock, chemicals, and are autoclavable for sterilization. They are ideal for applications requiring repeated sterilization cycles and offer excellent optical clarity for microscopy. However, glass dishes are fragile and can be more expensive upfront.
• Plastic: Typically made from polystyrene or polypropylene, plastic dishes are lightweight, shatterproof, and often come pre-sterilized for single-use applications. Polystyrene is common for cell culture due to its optical clarity, while polypropylene offers better chemical resistance. They are cost-effective for high-volume work but are generally not autoclavable.
• Quartz: Used in specialized applications, quartz dishes offer superior optical transmission in the UV spectrum, making them suitable for spectroscopy and other light-sensitive experiments. They are more expensive and less common for general lab use.

Types of Lab Dishes and Their Applications

• Petri Dishes: Shallow, circular dishes with lids, primarily used for culturing microorganisms, fungi, and small plant specimens on agar media. They come in various diameters.
• Cell Culture Dishes: Specifically designed for growing cells in vitro, these dishes often feature a treated surface to promote cell adhesion and growth. They are typically made from polystyrene and come in various sizes and shapes.
• Staining Dishes: Deeper, often rectangular dishes used for immersing slides or samples in stains, washes, or other reagents. They frequently include racks or inserts to hold multiple slides.
• Weighing Dishes/Boats: Small, disposable dishes used for accurately weighing solid or powdered samples. They are typically made from lightweight polystyrene or aluminum.
• Evaporation Dishes: Typically porcelain or glass, these are used for evaporating solvents to concentrate a solution or recover a solid solute.

Key Features and Considerations

• Sterility: For sensitive applications like cell culture or microbiology, pre-sterilized dishes are crucial. Ensure they are certified sterile and individually packaged or in sterile sleeves. Non-sterile dishes may require sterilization in your lab.
• Lids: Lids are essential for preventing contamination and reducing evaporation. Look for well-fitting lids that allow for gas exchange (e.g., vented lids for cell culture) if required, or tight seals for anaerobic conditions.
• Surface Treatment: For cell culture, tissue culture-treated surfaces promote cell attachment and proliferation. Untreated surfaces are suitable for suspension cultures or general lab use.
• Dimensions: Consider the diameter, depth, and total volume capacity. Match the dish size to your experimental scale and equipment (e.g., microscope stage, incubator shelves).
• Optical Clarity: If microscopy is involved, choose dishes with high optical clarity, especially in the viewing area, to avoid distortions.

Comparison Tips and Quality Assurance

When comparing different options, always check for certifications relevant to your field, such as ISO standards for manufacturing or specific material certifications. Reputable brands often provide detailed specifications and quality control data. Pay attention to the packaging; dishes should arrive undamaged and, if sterile, with intact seals. For critical applications, consistency between batches is important, so reviewing product reviews for feedback on batch variation can be helpful. Consider the overall value, factoring in reusability (for glass) versus convenience and disposability (for plastic). Your specific experimental needs should always guide the final selection.