Borosilicate Cover Glass

High-Performance Borosilicate Cover Glass for Advanced Microscopy & Scientific Research

Borosilicate Cover Glass is a premium optical glass specifically designed for demanding microscopy applications that require exceptional optical performance, superior chemical resistance, and excellent thermal stability. Compared with standard soda lime cover glass, borosilicate glass provides lower thermal expansion, higher durability, reduced autofluorescence, and outstanding optical transmission, making it the preferred choice for fluorescence microscopy, confocal microscopy, live-cell imaging, digital pathology, and high-resolution scientific research.

Chuangxin Medlab manufactures high-quality Borosilicate Cover Glass using carefully selected low-expansion optical borosilicate glass. Every cover glass is precision cut, edge-finished, polished, ultrasonically cleaned, and inspected under strict quality standards to ensure excellent flatness, thickness consistency, and reliable imaging performance.

Our products are available in square, rectangular, and circular formats with multiple standard thicknesses and customized dimensions. They are widely used by hospitals, pathology laboratories, universities, biotechnology companies, pharmaceutical laboratories, and research institutes worldwide.

As a professional Borosilicate Cover Glass Manufacturer, Chuangxin Medlab provides factory-direct supply, OEM manufacturing, and private-label services to global laboratory distributors and scientific equipment suppliers.

Why Choose Borosilicate Cover Glass?

For high-end microscopy, the quality of the cover glass directly influences image resolution, light transmission, and experimental reproducibility. Borosilicate glass is recognized worldwide as one of the most reliable materials for precision optical applications.

Key Features

• Premium optical borosilicate glass

• Outstanding optical transparency

• Low autofluorescence

• Excellent chemical resistance

• Superior thermal stability

• Low coefficient of thermal expansion

• Uniform thickness

• High surface flatness

• Precision-cut edges

• Excellent dimensional stability

• Compatible with high-resolution microscope objectives

• OEM & Private Label Available

Product Specifications

Available Shapes & Sizes

We offer a comprehensive selection of borosilicate cover glass formats.

Square Cover Glass

Common sizes:

• 18 × 18 mm

• 20 × 20 mm

• 22 × 22 mm

• 24 × 24 mm

Ideal for routine microscopy and fluorescence applications.

Rectangle Cover Glass

Available sizes:

• 24 × 32 mm

• 24 × 40 mm

• 24 × 50 mm

• 24 × 60 mm

Suitable for larger tissue sections and digital pathology.

Circle Cover Glass

Standard diameters:

• Ø12 mm

• Ø15 mm

• Ø18 mm

• Ø20 mm

• Ø22 mm

• Ø25 mm

Widely used in:

• Cell culture

• Confocal microscopy

• Live-cell imaging

• Fluorescence microscopy

Custom sizes are available upon request.

Standard Thickness Options

Different microscope objectives are designed for specific cover glass thicknesses.

No.1.5 is the preferred choice for most research-grade microscope objectives.

Advantages of Borosilicate Glass

Exceptional Optical Clarity

Borosilicate glass provides excellent light transmission, allowing sharper images with improved contrast and minimal distortion.

Low Autofluorescence

Unlike conventional glass, borosilicate glass generates minimal background fluorescence, making it ideal for fluorescence microscopy and immunofluorescence staining.

Superior Chemical Resistance

The material resists common laboratory chemicals such as ethanol, methanol, acetone, xylene substitutes, and staining reagents, ensuring long service life.

Excellent Thermal Stability

Its low thermal expansion coefficient helps maintain dimensional stability during temperature changes, making it suitable for applications involving heating, sterilization, or environmental fluctuations.

Outstanding Flatness

Precision manufacturing ensures excellent flatness, supporting accurate focusing and consistent imaging across the entire observation area.

Precision Manufacturing Process

Every Borosilicate Cover Glass undergoes a carefully controlled manufacturing process.

Manufacturing Steps

1. Optical glass selection

2. Precision CNC cutting

3. Edge finishing

4. Double-sided polishing

5. Ultrasonic cleaning

6. Deionized water rinsing

7. Clean-room drying

8. Thickness inspection

9. Optical quality inspection

10. Automated packaging

11. Batch traceability

Each step is monitored to ensure exceptional product consistency.

Strict Quality Control

Every production batch undergoes comprehensive quality verification.

Inspection items include:

• Optical transmission

• Thickness consistency

• Surface cleanliness

• Flatness

• Edge quality

• Dimensional accuracy

• Chemical resistance verification

• Packaging integrity

These procedures ensure dependable performance in demanding laboratory environments.

Applications

Fluorescence Microscopy

Low autofluorescence improves signal-to-noise ratio and enhances image quality.

Confocal Microscopy

Uniform thickness ensures compatibility with high numerical aperture objectives.

Live-Cell Imaging

Excellent optical properties support long-term observation of living cells.

Histology & Pathology

Protects tissue sections while maintaining specimen integrity and image clarity.

Cell Culture

Frequently used as a growth substrate for cultured cells in advanced biological research.

Digital Pathology

Supports high-resolution whole-slide scanning with consistent optical quality.

Pharmaceutical Research

Used in drug discovery, biomarker analysis, and laboratory testing.

Biotechnology

Suitable for molecular biology, immunofluorescence, and advanced life science research.

Why Choose Borosilicate Cover Glass Over Soda Lime Glass?

For laboratories performing fluorescence microscopy, confocal imaging, or precision scientific research, borosilicate cover glass provides clear performance advantages.

OEM & Private Label Manufacturing

Chuangxin Medlab offers comprehensive OEM services for laboratory brands and distributors.

Customization options include:

• Custom dimensions

• Thickness selection

• Private-label packaging

• Customer logo printing

• Barcode labels

• Export cartons

• Bulk packaging

• Distributor-exclusive branding

Our engineering team supports projects from prototype development through mass production.

Why Choose Chuangxin Medlab?

Chuangxin Medlab specializes in microscope slides, cover glass, and pathology consumables.

Our Advantages

• Professional Optical Glass Manufacturer

• Premium Borosilicate Raw Materials

• Advanced Precision Processing

• Strict Quality Management

• Stable Production Capacity

• Competitive Factory Pricing

• OEM & Private Label Expertise

• Fast Worldwide Delivery

• Technical Support

• Export Experience to More Than 80 Countries

Our products are trusted by hospitals, universities, research institutes, biotechnology companies, pharmaceutical laboratories, and laboratory distributors worldwide.

Frequently Asked Questions

What is Borosilicate Cover Glass?

Borosilicate Cover Glass is a high-performance optical glass used to protect microscope specimens while providing exceptional optical clarity, chemical resistance, and thermal stability.

Why choose borosilicate instead of soda lime?

Borosilicate glass offers lower autofluorescence, higher chemical resistance, better thermal stability, and superior performance for fluorescence microscopy and advanced research.

Which thickness is recommended?

Most research-grade microscope objectives are designed for No.1.5 (0.16–0.19 mm) cover glass, making it the most widely recommended option.

Do you offer OEM manufacturing?

Yes. We provide OEM manufacturing, customized dimensions, private-label packaging, logo printing, and bulk production for laboratory distributors and scientific equipment suppliers.

Can you manufacture custom sizes?

Yes. We can produce customized square, rectangular, and circular borosilicate cover glass according to your specifications.

Request a Quote

Looking for a trusted Borosilicate Cover Glass Manufacturer?

Chuangxin Medlab supplies premium borosilicate cover glass with superior optical clarity, low autofluorescence, excellent chemical resistance, and consistent quality. We provide factory-direct pricing, flexible OEM services, and reliable global export support.

Contact us today to request samples, receive a quotation, or discuss your custom manufacturing requirements.