Home » Blogs » Industry News » How Glass Can Be Cut After It's Tempered

How Glass Can Be Cut After It's Tempered

Views: 0     Author: Site Editor     Publish Time: 2025-10-16      Origin: Site

Inquire

facebook sharing button
twitter sharing button
line sharing button
wechat sharing button
linkedin sharing button
pinterest sharing button
whatsapp sharing button
sharethis sharing button

If you attempt to have glass be cut after it has been tempered, the tempered glass will break immediately. This is because tempered glass holds internal stress, causing it to react instantly to any attempt to alter it. Even a small chip or minor crack can cause the entire glass to shatter. Uneven heating or cooling during the process of having glass be cut adds even more stress, making it nearly impossible to cut tempered glass safely. For this reason, you should always have the glass be cut before the tempering process. While some specialized factories can have tempered glass be cut, they require advanced tools and highly trained professionals to do so.

Key Takeaways

  • You cannot cut tempered glass after it is tempered because of stress inside. If you try to cut it, it will break into pieces.

  • Always cut glass before it goes through the tempering process. This way, you get the right size and shape. You also do not risk breaking the glass.

  • If you need to change tempered glass, order custom pieces from experts. This helps keep the glass strong and safe.

  • Ask certified glass experts for help with handling and installing glass. Their skills help you avoid expensive mistakes.

  • For projects that need easy cutting, use regular annealed glass instead of tempered glass.

Can tempered glass be cut?

Can tempered glass be cut?

You may ask if glass be cut after tempering. Many people in the glass industry wonder about this. The answer is clear. You cannot cut tempered glass safely after it is tempered. Tempered glass gets stronger during tempering. This strength comes from stress inside the glass. These stresses make the glass break quickly if you try to cut or change it.

Why glass be cut before tempering

Glass should be cut before tempering. This is how most glass makers do it. They suggest cutting first because tempered glass cannot be cut again. Cutting first helps you get the right size and shape. You can also finish edges or add holes before the glass gets too strong.

Tip: Always plan your project well. Finish all work like edging or etching before tempering. This stops problems later.

Here are the usual steps before tempering:

  • The glass is cut to shape with a CNC cutting machine.

  • Extra glass is taken off by hand.

  • All work, like edging and etching, is done before tempering.

If you skip these steps and try to cut glass after tempering, you could ruin the whole piece.

What happens if you try to cut tempered glass

Trying to cut tempered glass after tempering breaks the stress inside. This makes the glass shatter into many small pieces. These pieces are not as sharp as regular glass, but they can still hurt you and make a mess.

  • Breaking the stress causes lots of tiny pieces.

  • The whole sheet can break at once.

  • Even a small chip or crack can break the whole piece.

Tempered glass cannot be cut or changed after tempering because it is stronger and more stable. Its features stop any changes, so glass be cut to the right size and shape before tempering. If you need to cut tempered glass, order custom pieces or ask a professional.

Note: Cutting tempered glass after tempering is rare in the glass industry. Most experts do not do it to keep the glass safe and strong.

If you plan ahead and have glass be cut before tempering, you will save money and keep your project going well.

Methods to cut tempered glass

Cutting tempered glass is very hard. You cannot use simple tools at home. You need special machines and expert skills. Most ways to cut tempered glass happen in big factories. These ways are not safe for home projects. You should always ask experts if you need to change tempered glass.

Annealing process

One way to cut tempered glass is by annealing. Annealing means heating the glass in a kiln. This removes the stress inside the glass. The glass turns back into regular glass. After annealing, you can cut, drill, or shape it. This gives you more choices for custom designs. Annealed glass lets you change the size or add holes. The glass will not break as easily. This method needs special tools and careful heat control.

Tip: Annealed glass is easier to cut and shape. It is good for art projects and custom sizes.

Laser cutting and sandblasting

Laser cutting and sandblasting are advanced ways to change tempered glass. Laser cutting uses a CO2 laser for very exact cuts. You can cut glass up to 25mm thick with great accuracy. This lets you make detailed shapes and patterns. Sandblasting uses fast particles to mark or shape the glass. Both ways need special machines and safety gear.

Specification

Capability

Application

CO2 Laser Type

Most effective for glass

General cutting operations

Thickness Range

Up to 25mm

Various applications

Precision Level

±0.1mm tolerance

High-precision requirements

Cutting tempered glass with lasers has many good points. You get exact cuts, fast work, and custom shapes. You also waste less glass and save on work costs. But if you do not cut right, the glass can crack or break. You must set the laser carefully.

Lever is a leader with its glass tempering furnace. This furnace uses strong air flow for top-quality tempered glass. Lever gives you the right machines and skills for safe glass work. You should let experts cut tempered glass to stay safe.

Feature

Annealed Glass

Tempered Glass

Cost

More cost-effective

More expensive

Cutting Ease

Easy to cut, shape, drill, and polish

Cannot be cut or drilled after tempering

Safety Risk

High risk of dangerous shattering

Safer breakage pattern (small pieces)

Applications

Low-cost, customizable projects

Safety-critical applications

Note: Cutting tempered glass is risky and costs a lot. Always plan your project and ask experts like Lever for help.

Alternatives if glass be cut is needed

If you need to change the size or shape of tempered glass, there are safe choices. These options help you avoid breaking the glass by trying to cut it yourself.

Ordering custom tempered glass

Getting custom cut tempered glass is the best way to get the right size and shape. You can pick the type, thickness, and edge finish before the glass is tempered. This keeps the glass strong and safe. Most companies let you choose clear, low-iron, or frosted glass. You also pick the thickness, edge style, and corner treatments for safety.

  • Pick the glass type you want.

  • Give the exact measurements.

  • Choose the edge finish and corner style.

The price of custom cut tempered glass depends on what you pick. Here is a table to show the prices:

Glass Type

Avg. Price per Sq. Ft.

Standard Tempered Glass

$10 – $15

Custom Cut Tempered Glass

$18 – $30

Custom Curved Tempered Glass

$35 – $100+

Custom Tempered Glass Shelves

$20 – $40

Bar chart comparing average price per square foot for different types of tempered glass

Your order will arrive in about 5 to 10 business days. This is faster and safer than trying to change glass at home.

Consulting glass professionals

If you are not sure what to do, talk to glass professionals. Certified experts know how to measure, handle, and install glass safely. Look for people with certifications like Certified Glass Installer (CGI) or Certified Glazing Technician (CGT). These experts have lots of training and follow safety rules.

Certification Name

Issuing Organization

Focus Areas

CGI

NGA

Installation, safety

CGT

NGA

Advanced glazing

AGMT

FCA International

Architectural glass

SGCC

SGCC

Safety glazing

FGIA

FGIA

Fenestration

Tip: Always check for certifications before you hire someone. This helps you get safe and good results.

Choosing other glass types

If you want glass you can cut at home, try other types. Regular annealed glass is easy to cut with simple tools. Laminated glass is another choice, but it is harder to work with. Professionals should handle laminated glass. Each glass type has different safety and strength features.

Glass Type

Safety Characteristics

Durability Characteristics

Tempered Glass

Shatters into small, blunt pieces

8-18 times stronger than regular glass

Laminated Glass

Holds together when broken

Withstands significant force

Wired Glass

Can break into sharp pieces

Used in fire-rated applications

Note: Pick the right glass for your project. Tempered glass is best for safety. Annealed glass is good for easy cutting.

Conclusion

You should not try to cut tempered glass after it is tempered. If you do, the glass can break in a dangerous way. Make sure to plan your cuts and pick your glass before tempering. Talking to experts can help you avoid problems and get good results.

When you begin your project, keep these tips in mind:

  • Tell the fabricator your glass size and thickness.

  • Work with skilled fabricators for custom glass.

  • Know where you want holes and edges before tempering.

Picking the right glass early helps you save time, money, and worry.

FAQ

Can you cut tempered glass at home with a glass cutter tool?

You cannot cut tempered glass at home with a glass cutter tool. The glass will shatter because it holds strong internal stress. You should always cut glass before tempering.

Is it safe to cut tempered glass at home with a wet saw?

You should not use a wet saw to cut tempered glass at home. The glass will break into small pieces. Only professionals with special equipment can handle tempered glass safely.

What is the best way to cut glass at home?

You can cut glass at home if you use regular annealed glass. Use a glass cutter tool for straight cuts. Always wear gloves and safety glasses to protect yourself.

Why does tempered glass break when you try to cut it?

Tempered glass breaks because it has built-in stress. When you try to cut tempered glass at home, the stress releases quickly. This causes the glass to shatter into many pieces.

Can you cut glass at home after it has been tempered?

You cannot cut glass at home after tempering. The glass will shatter. If you need a special size, order custom tempered glass from a professional.

LET US MAKE BUSINESS SIMPLE

Quick Links

Product Category

Contact Us

Copyright © 2023 Luoyang Lever Industry Co., Ltd. by leadong.com Sitemap.