How to Make Photochromic Glass: DIY Guide

How to Make Photochromic Glass

Table of Contents

Have you ever wondered how those eyeglasses or windows darken in response to sunlight? The secret lies in photochromic glass. This remarkable material transitions from clear to tinted when exposed to UV light, providing comfort and protection against glare. In this comprehensive DIY guide on how to make photochromic glass, we’ll delve into the intriguing process of creating your very own photochromic glass.

Introduction to Photochromic Glass

It is a type of glass that possesses the remarkable property of changing its tint based on the intensity of UV light exposure. This feature makes it incredibly versatile and suitable for various applications, from eyewear to architectural designs.

Understanding the Science Behind Photochromism

At the heart of photochromic glass lies a scientific wonder. Photochromic molecules embedded within the glass undergo a reversible molecular transformation in response to UV light. When exposed to UV rays, these molecules change their structure, causing the glass to darken. The process is akin to the behavior of plant leaves that adjust their position towards light.

Gathering the Necessary Materials

Before embarking on your photochromic glass creation journey, make sure you have all the essential materials ready:

  • Clear Glass Panels: These will serve as the canvas for your photochromic experiment.
  • Photochromic Solution: Obtain a high-quality photochromic solution readily available from specialized suppliers.
  • Applicator or Paintbrush: To apply the solution onto the glass evenly.
  • Mixing Bowl: You’ll need this to prepare and mix the photochromic solution.
  • Safety Gear: Wear gloves and safety goggles to protect yourself during the process.
  • UV Light Source: A UV light source is necessary to initiate the photochromic reaction.
  • Cleaning Supplies: Ensure the glass panels are clean and free from debris before applying the solution.

How to Make Photochromic Glass

Here you can check the DIY guide on how to make photochromic glass.

Preparing the Glass Panels

Begin by cleaning the glass panels meticulously. Use a gentle glass cleaner along with a lint-free cloth to eliminate any dust, fingerprints, or smudges. A clean surface ensures optimal adhesion of the photochromic solution.

Mixing the Photochromic Solution

Follow the manufacturer’s instructions to prepare the photochromic solution. This step may involve mixing different components to achieve the desired formulation. Wear your safety gear during this process to avoid direct contact with the solution.

Applying the Solution to the Glass

Using a fine-bristle paintbrush or an applicator, apply a thin and even layer of the photochromic solution onto the glass panels. Take your time to ensure the coating is uniform across the entire surface.

Drying and Curing the Glass

Allow the glass panels to dry in a controlled environment, away from direct sunlight. Follow the recommended curing time provided by the manufacturer. This curing process is crucial for the photochromic molecules to bond securely with the glass surface.

Testing and Fine-Tuning

Expose the coated glass panels to a controlled UV light source. Observe the gradual tinting process as the photochromic molecules react to the UV light. If the tint appears too light or too dark, you can experiment with additional layers of the solution to achieve the desired level of tint.

Safety Precautions

While this DIY project can be exciting, it’s paramount to prioritize safety throughout the process. Always wear your safety gloves and goggles to prevent any direct contact with the solution. Additionally, ensure proper ventilation in the workspace to avoid inhaling any fumes emitted during the process.

Applications of Photochromic Glass

The versatility of photochromic glass finds its application in various domains:

  • Eyeglasses and Sunglasses: Photochromic lenses in eyewear automatically adjust their tint, providing enhanced comfort in changing lighting conditions.
  • Windows and Skylights: These glass windows offer dynamic control over sunlight and heat, reducing the need for additional shading devices.
  • Architectural Designs: Incorporating this type of glass into architectural structures adds an element of innovation and functionality.
  • Art Installations: Artists use this kind of glass to create interactive and evolving art pieces that respond to natural light changes.
  • Protective Enclosures: This glass can be used in enclosures to shield delicate artifacts from harmful UV radiation.

Benefits of Making Your Own Photochromic Glass

Crafting your own glass provides a range of advantages:

  • Cost-Effectiveness: Making your own glass can be more economical than purchasing pre-made products.
  • Customization: You have the freedom to control the tint intensity and experiment with different coatings.
  • Personal Achievement: Creating functional glass from scratch offers a sense of accomplishment.
  • Educational Experience: Engaging in this DIY project deepens your understanding of photochromism and material science.
  • Innovation and Creativity: Crafting your glass opens the door to innovation. You can experiment with different formulations, coatings, and application techniques to push the boundaries of what photochromic glass can do.

Maintenance and Longevity

To ensure the long-lasting effectiveness of your photochromic glass, adopt these maintenance practices:

  • Gentle Cleaning: Regularly clean the glass with a soft, damp cloth to remove dust and dirt. Avoid using abrasive cleaners that might damage the photochromic coating. Cleaning the glass with harsh chemicals or abrasive materials can compromise the effectiveness of the photochromic properties.
  • Avoid Extreme Conditions: Minimize exposure to extreme temperatures or prolonged direct sunlight to prevent premature degradation of the photochromic properties. High temperatures can affect the stability of the photochromic molecules, leading to diminished tinting performance over time.
  • Inspect for Damage: Periodically inspect the glass for any signs of damage, such as scratches or cracks. Address any issues promptly to prevent further deterioration. Minor scratches can affect the appearance and performance of the glass, so consider using protective coatings if the glass is in a high-traffic area.


Incorporating photochromic glass into your surroundings not only offers practical benefits but also showcases your creative prowess. By following this comprehensive DIY guide on how to make photochromic glass, you can create your very own glass, marvel at its color-changing magic, and gain insights into the intriguing world of light-responsive materials.


Yes, this type of glass works well with most window types, making it versatile for various applications. However, it's essential to consider specific space requirements and lighting needs to determine their suitability for your windows.

Absolutely. Recent advancements have led to the development of glass that can change both tint and color, adding an artistic and dynamic element to spaces. Working closely with suppliers or manufacturers can help you find the right fit for your project.

The tinting process occurs rapidly, usually within seconds to minutes, upon exposure to UV light. This swift response ensures immediate relief from glare and excessive sunlight.

Applying a solution manually is intricate and can lead to uneven tinting and damage. Opt for professionally manufactured eyewear from reputable brands to ensure effectiveness and safety.

Generally safe, though those with eye sensitivities or conditions should consult professionals before using. Despite its UV protection, additional measures like sunscreen and sunglasses are advisable for prolonged outdoor exposure.



A switchable glass expert with 10+ years in the industry. Empower readers with insights into Smart glass, Transparent LED tech, and more. Join Sharath on the journey of glass innovation with Glasstronn