Watch Glass Set YOKIVE Laboratory Cover Lids 50mm and 90mm Transparent

Description

Product Overview

The YOKIVE watch glass set is engineered for precision and durability in demanding laboratory environments. Each set contains two circular glass lids, one with a 50 mm (1.97 inch) diameter and the other with a 90 mm (3.54 inch) diameter, both crafted from high‑grade borosilicate glass that resists chemical attack and thermal shock. The glass thickness of 2 mm (0.08 inch) offers a sturdy yet lightweight platform that can be easily handled with tweezers or gloved hands. Transparent construction ensures unobstructed visual monitoring of reactions, crystallizations, or evaporations, while the smooth, beveled edges reduce the risk of accidental breakage during placement or removal. The set is packaged in a compact box measuring 5.51 x 3.94 x 0.59 inches, weighing only 2.4 ounces, making it convenient for storage and transport to field sites or classroom labs.

Usage

These watch glasses are versatile tools for a wide range of scientific procedures. In chemistry labs, they serve as ideal covers for beakers and evaporating dishes, helping to minimize solvent loss while allowing gases to escape safely. Their flat surface is perfect for spreading thin layers of reagents, facilitating uniform heating or drying. In biology and environmental testing, the clear glass enables easy observation of microbial cultures or precipitation events without disturbing the sample. The set is also valuable for educational demonstrations, where students can visually track phase changes, crystallization, or color reactions. Because the glass is chemically inert, it does not interact with acids, bases, or organic solvents, preserving sample integrity across diverse experimental protocols.

Why Choose Us

Choosing YOKIVE means selecting a brand committed to quality control and consistent performance. Each watch glass undergoes rigorous inspection for surface imperfections, ensuring a flawless viewing window and uniform thickness across the entire disc. The manufacturing process adheres to ISO‑9001 standards, guaranteeing that every piece meets exact dimensional tolerances and chemical resistance specifications. YOKIVE provides responsive customer support, offering guidance on proper handling, cleaning, and storage to extend the lifespan of the glassware. In addition, the company backs its products with a satisfaction guarantee, allowing users to replace any defective item promptly. This dedication to reliability and service makes YOKIVE a trusted partner for research institutions, teaching laboratories, and independent scientists alike.

Key Features

• Two sizes (50 mm and 90 mm) cover a broad range of experimental needs.
• High‑grade borosilicate glass offers superior chemical durability and thermal resistance.
• Transparent design provides clear visual access to reactions and samples.
• Beveled edges reduce breakage risk and improve handling safety.
• Responsive customer support and satisfaction guarantee for peace of mind.

FAQ

Can the watch glasses be used directly over an open flame?

No. While the glass is heat‑resistant, direct exposure to open flame can cause thermal shock and cracking. Use a heat diffuser or place the glass over a pre‑heated plate instead.

Are the watch glasses suitable for use as evaporating dishes?

They are designed primarily as covers, not as primary evaporating dishes. For prolonged evaporation, a dedicated evaporating dish is recommended to avoid uneven heating.

How should I clean the watch glasses after use?

Rinse with distilled water, then wash with a mild laboratory detergent. Avoid abrasive scrubbers; a soft brush or sponge will preserve the surface clarity. Dry with lint‑free tissue or air‑dry before storage.

What is the warranty policy for this product?

YOKIVE offers a one‑year limited warranty against manufacturing defects. If a glass breaks due to a defect, contact customer service for a replacement.

Can I purchase additional sets to expand my inventory?

Yes, the watch glasses are sold individually or in bulk packages. Contact the seller for volume pricing and availability.