Clock Glass (Borosilicate Glass) Manufacturer,Supplier and Exporter in India

Clock Glass (Borosilicate Glass) (Product Code: SCI-610/103) is a curved borosilicate glass dish, commonly called a watch glass, used to cover beakers, evaporate small volumes, weigh solids and hold samples for observation in chemistry and biology labs. Its glazed, smooth finish and clear vision through the glass let students watch crystals form or examine a sample closely. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.

Key Details

What Is the Watch Glass (Clock Glass) Used For?

Placed over the mouth of a beaker, the clock glass acts as a lid that keeps dust out and reduces splashing while a solution is warmed. On its own it serves as a small evaporating surface: a few drops of salt solution left on the glass dry to show crystals, a common demonstration in crystallisation lessons. It is also a handy surface for weighing small amounts of solid or holding a specimen for a closer look with a hand lens.

Borosilicate glass tolerates temperature changes better than ordinary soda glass, so gentle warming, such as resting the glass on a beaker of hot water, is fine. Clean it soon after use, since dried residues are harder to remove, and store the glasses flat with paper between them to protect the glazed surface. It is a basic item in any borosilicate laboratory glassware set for Indian school and college labs.

What to Specify When Ordering

• Diameter: not stated for code SCI-610/103, so state the size you need or see the listing with stated diameters below.
• Purpose: if the glasses will cover beakers, give the beaker sizes so the diameters can match.
• Quantity: the number of glasses per student group.

OEM Manufacturer

Jain Scientific Equipments Private Limited, which does business as ScienceLab, is the OEM of this Clock Glass (Borosilicate Glass). It is manufactured at the company's licensed factory in Saha, Ambala, Haryana, India, and supplied directly by the maker to schools, colleges, laboratories, dealers and importers. Buying from the manufacturer means the sizes you settle on can be repeated in later orders without hunting for an equivalent. See the ScienceLab profile for more about the company.

Related Laboratory Equipment

Clock glasses are used alongside these items in evaporation, crystallisation and weighing work.

• Clock Glass 45mm, 60mm, 70mm — a listing with stated diameters.
• Clock Glass — another clock glass listing.
• Chemical Beaker 250 ml — the vessel a clock glass most often covers.
• Crystallizers 250 ml — for growing crystals on a larger scale.
• Spoon Spatula — for placing solids on the glass for weighing.

Explore the full Laboratory Equipment range for more glassware.

Frequently Asked Questions

What is a Clock Glass (Borosilicate Glass)?
The Clock Glass (Borosilicate Glass), code SCI-610/103, is a curved glass dish, also called a watch glass, used as a beaker cover, a small evaporating surface and a weighing or observation dish. It is borosilicate glass with a glazed, smooth finish.

What size is this clock glass?
A diameter is not stated for the Clock Glass (Borosilicate Glass) listing, so tell us the size you need when you enquire. For covering beakers, choose a diameter slightly larger than the beaker mouth; a separate listing gives stated diameters.

Can the clock glass be heated?
The Clock Glass (Borosilicate Glass) can take gentle warming, for example resting on a beaker of hot water to evaporate a solution. Borosilicate glass copes with temperature changes better than ordinary glass, but avoid a direct flame and sudden cooling of a hot glass.

How should it be cleaned and stored?
Wash the Clock Glass (Borosilicate Glass) soon after use with detergent and a soft cloth, rinse with distilled water and let it dry. Store the glasses flat with paper between them so the glazed surface is not scratched.

Who manufactures the Clock Glass (Borosilicate Glass)?
The Clock Glass (Borosilicate Glass) is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its licensed factory at Saha, Ambala, Haryana, India. Enquiries, quotations and repeat orders are dealt with directly by the manufacturer.

What does a quotation need?
To quote the Clock Glass (Borosilicate Glass), we need code SCI-610/103, the diameter or beaker size it must fit, the quantity and the delivery location. Schools, dealers and importers in India and international markets can combine it with beakers in one enquiry.

Request a Quote

Enquire about the Clock Glass (Borosilicate Glass) on the contact page or add it to the enquiry cart with your beakers. The quotation comes from the manufacturer directly.

Last updated: 24 September 2026