How To Tell If Pyrex Is Borosilicate

Pyrex is a brand of glassware that is made from borosilicate glass. This type of glass is more resistant to thermal shock and breaking than other types of glass, making it a popular choice for kitchenware. There are several ways to tell if a piece of Pyrex is made from borosilicate glass. One way is to check the bottom of the piece for the words “Borosilicate Glass.” Another way is to look for the code “7100”

How To Tell If Pyrex Is Borosilicate

Pyrex is a brand name for a type of glassware made from borosilicate. Borosilicate is a type of glass that is resistant to thermal shock and is less likely to break than other types of glass. It is also resistant to chemicals and corrosion. To determine if a piece of glassware is made from borosilicate, look for the word “Pyrex” or “Borosilicate” on the label.

To determine if a Pyrex dish is made of borosilicate glass, you will need a few household items. First, fill a sink or large bowl with cold water and ice. Next, place the dish in the water and wait for a few minutes. If the dish begins to float, it is made of borosilicate glass. If the dish sinks, it is not made of borosilicate glass.

  • Check the bottom of the pyrex container for a code number
  • If the code number is “b” then the pyrex is borosilicate

on ‘what is pyrex’ -Pyrex is a type of glass that is made from borosilicate. -Borosilicate is a type of glass that is made from a mix of boron and silicon. -This type of glass is more resistant to thermal shock than other types of glass. -Pyrex is often used in cookware and laboratory equipment because of its strength and resistance to heat.


Frequently Asked Questions

How Can I Tell If My Pyrex Is Borosilicate?

The easiest way to tell if your Pyrex is borosilicate is to check the bottom of the dish. If it has a code consisting of the letters “B” and “S” (for borosilicate), then it is made of that type of glass.

When Did Pyrex Stop Using Borosilicate?

Pyrex stopped using borosilicate in the 1970s.

What Is The Difference Between Borosilicate And Pyrex Glass?

Borosilicate glass is chemically more resistant to thermal shock than Pyrex glass. Borosilicate glass is also more resistant to chemical corrosion than Pyrex.


To Review

There are a few telltale signs to look for to determine if your Pyrex is made of borosilicate glass. First, check the bottom of the dish or pan. If it has a “B” or “C” etched into it, then it is made of borosilicate. Additionally, if the glass is especially thick and heavy, it is likely made of borosilicate. Finally, try heating up the dish or pan. If it doesn’t heat up as quickly as other glass dishes or pans and remains relatively cool to the touch, then it is likely made of borosilicate.

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