Watch Glass

Product Code : SCL-LG-11975

The laboratory watch glass pack of 12 is a set of shallow, circular laboratory dishes used for covering beakers, holding small samples and supporting controlled evaporation. The set is suitable for students, teachers, laboratory technicians and researchers who need multiple watch glasses for routine laboratory procedures.

Product Description

A watch glass has a shallow, concave profile that provides an accessible surface for handling small quantities of liquids or solids. It can be placed over a compatible beaker as a non-sealing cover, used as a temporary sample holder or employed during observation and evaporation procedures.

This product contains 12 watch glasses, making it practical for classroom groups, laboratory workstations and institutional supply. The diameter, thickness, material and temperature suitability were not provided and should be confirmed before purchase. Buyers can compare related items in the laboratory glassware range.

Key Features

• Pack of 12: Supplies twelve individual watch glasses for shared laboratory or classroom use.
• Multipurpose form: Supports sample holding, beaker covering, observation and suitable evaporation procedures.
• Shallow concave profile: Keeps small samples accessible during examination or preparation.
• Useful beaker cover: Helps reduce direct exposure while allowing vapour to escape around the edge.
• Suitable for dry samples: Provides a separate surface for holding small quantities of powders, crystals or specimens.
• Classroom-ready quantity: Allows several students or laboratory stations to work at the same time.
• Simple laboratory handling: Requires no assembly and can be placed directly on a clean, stable work surface.

Technical Specifications

What's Included in the Kit

• 12 individual laboratory watch glasses

No additional beakers, samples, forceps or laboratory accessories are stated as included.

Applications and Uses

• Covering compatible laboratory beakers without creating an airtight seal.
• Holding small solid samples during observation or sorting.
• Supporting controlled evaporation of small liquid quantities when the material is suitable.
• Providing a surface for weighing solids after the watch glass has been tared.
• Displaying crystals, powders or small specimens during laboratory demonstrations.
• Supporting practical activities in chemistry laboratories and science classrooms.

Complement the set with suitable laboratory beakers or browse additional chemistry laboratory equipment.

How to Use the Watch Glass

1. Inspect the watch glass for chips, cracks, scratches or contamination.
2. Clean and dry it according to the intended laboratory procedure.
3. Place it on a clean, level surface before adding a small sample.
4. For weighing, place the empty watch glass on the balance and tare the balance first.
5. When covering a beaker, position the watch glass centrally without attempting to create a pressure-tight seal.
6. After use, transfer or dispose of the sample according to the laboratory procedure.

Safety note: Wear suitable laboratory PPE. Do not expose the watch glass to direct flame, sudden temperature changes or corrosive substances until its material and compatibility have been confirmed.

Care & Maintenance

• Wash with a cleaning agent compatible with the confirmed material.
• Avoid abrasive brushes that could scratch the working surface.
• Store the pieces separately or with protective dividers to reduce contact damage.
• Remove chipped, cracked or heavily scratched watch glasses from service.

Why Choose Science Lab Supplies?

Science Lab Supplies manufactures and exports scientific laboratory instruments, glassware, experiment setups and educational equipment. Its range supports schools, colleges, universities and laboratory procurement projects. Buyers can confirm dimensions, materials, packing and export requirements before ordering. Related vessels are available in the laboratory flasks category.

Frequently Asked Questions

What is a laboratory watch glass used for?

A watch glass is used for covering beakers, holding small samples, observing materials and supporting suitable evaporation or weighing procedures.

How many watch glasses are included?

The pack contains 12 individual watch glasses.

What material is this watch glass made from?

The material was not provided. Confirm whether it is borosilicate glass, soda-lime glass or another material before ordering.

Can a watch glass be heated?

Heating suitability depends on the material and manufacturer instructions. Do not apply direct flame or thermal shock without verified temperature specifications.

Can it be used as a beaker lid?

Yes, a suitably sized watch glass can serve as a loose beaker cover. It does not create an airtight or pressure-resistant seal.

Is this pack suitable for schools?

The 12-piece pack can support supervised school and college laboratory activities. Appropriate handling and eye protection are recommended.

Request the required diameter and material specification before ordering the pack from the Science Lab Supplies laboratory glassware range.

Recommended image ALT text: Laboratory watch glass pack of 12 shallow circular sample dishes.