Ask a Glass Question

Browse "Ask a Glass Question" Answers

Does glass break if it gets too hot or too cold?
Last Updated: Mar 13, 2024 |
Topics:
- Science
|
Views: 98992
What causes the varied purple hues in old glass bottles?
Last Updated: Feb 17, 2025 |
Topics:
- Bottles
- Science
|
Views: 47617
What is the origin of the term "glory hole"?
Last Updated: Feb 19, 2024 |
Topics:
- Glass history
- Glassmaking
|
Views: 45974
Which ingredients cause glass to fluoresce?
Last Updated: Apr 10, 2024 |
Topics:
- Glass types
- Science
|
Views: 27499
Why does Corelle get brittle as it ages?
Last Updated: Apr 09, 2024 |
Topics:
- Conservation
- Kitchenware
|
Views: 26881
What can you tell me about the history of purple glass?
Last Updated: Dec 17, 2018 |
Topics:
|
Views: 21677
What causes an oily film on glass objects?
Last Updated: Dec 02, 2022 |
Topics:
- Conservation
- Science
|
Views: 16197
Does glass conduct electricity?
Last Updated: Sep 06, 2022 |
Topics:
- Science
- Technical questions
|
Views: 14847
What is the history of clear or colorless glass?
Last Updated: Jul 14, 2025 |
Topics:
|
Views: 12899
Why would clear glass show a greenish glow under black light?
Last Updated: Nov 23, 2021 |
Topics:
- Glass types
- Science
|
Views: 12884
What is slag glass?
Last Updated: Jul 17, 2025 |
Topics:
- Identification
|
Views: 11879
Does the library have recipes including the binder for the glass powders in pâte de verre?
Last Updated: Mar 09, 2024 |
Topics:
- Glass art
- Techniques
|
Views: 11609
Do you know who made the red glass 1876 Cape Cod collection for AVON?
Last Updated: Jul 17, 2025 |
Topics:
- Identification
|
Views: 10917
Can I fuse pieces of glass together by using an acetylene torch?
Last Updated: May 31, 2019 |
Topics:
|
Views: 10808
What year was the pattern cornflower made by corning-ware?
Last Updated: Jul 17, 2025 |
Topics:
- Corning Incorporated
|
Views: 9928
Could it be said that Fire-King is Pyrex before Pyrex? When did Pyrex start? When did Fire-King start? And when did Glasbake start?
Last Updated: Jul 17, 2025 |
Topics:
|
Views: 8679
During which periods of time was Manganese dioxide used to decolorize glass?
Last Updated: Jul 17, 2025 |
Topics:
|
Views: 8514
We have an antique glass/metal fire extinguisher which is blown glass with some kind of liquid inside. It is surrounded by a metal encasing with a spring-loaded sharp point on the bottom. We can't find any information on it.
Last Updated: Jul 17, 2025 |
Topics:
|
Views: 7456
Can old glass be recognized by a metal detector?
Last Updated: Mar 09, 2024 |
Topics:
|
Views: 7011
Does colored glass fade?
Last Updated: Apr 09, 2025 |
Topics:
- Conservation
- Science
|
Views: 6500

We have an antique glass/metal fire extinguisher which is blown glass with some kind of liquid inside. It is surrounded by a metal encasing with a spring-loaded sharp point on the bottom. We can't find any information on it.
Last Updated: Jul 17, 2025 |
Topics:
|
Views: 7456
During which periods of time was Manganese dioxide used to decolorize glass?
Last Updated: Jul 17, 2025 |
Topics:
|
Views: 8514
Could it be said that Fire-King is Pyrex before Pyrex? When did Pyrex start? When did Fire-King start? And when did Glasbake start?
Last Updated: Jul 17, 2025 |
Topics:
|
Views: 8679
What year was the pattern cornflower made by corning-ware?
Last Updated: Jul 17, 2025 |
Topics:
- Corning Incorporated
|
Views: 9928
Do you know who made the red glass 1876 Cape Cod collection for AVON?
Last Updated: Jul 17, 2025 |
Topics:
- Identification
|
Views: 10917
What is slag glass?
Last Updated: Jul 17, 2025 |
Topics:
- Identification
|
Views: 11879
How can I remove stubborn grease stains from clear Pyrex?
Last Updated: Jul 14, 2025 |
Topics:
- Conservation
- Pyrex
|
Views: 141
What is the history of clear or colorless glass?
Last Updated: Jul 14, 2025 |
Topics:
|
Views: 12899
When and How did Corning Glass ended up in NY?
Last Updated: Jul 01, 2025 |
Topics:
- Corning Incorporated
- Glass history
|
Views: 348
How can I make a Rakow Library account?

Last Updated: May 20, 2025 | Views: 18
Do I need to log into the Rakow Library catalog to view materials online?
Last Updated: May 13, 2025 |
Topics:
- Library Information
|
Views: 101
Is there a way to know how many units Steuben produced of a particular piece?
Last Updated: Apr 21, 2025 |
Topics:
|
Views: 92
How are metal oxides used to color glass?
Last Updated: Apr 09, 2025 |
Topics:
- Glassmaking
- Science
|
Views: 1958
What type of sand is generally used in glassmaking and what is the temperature in the oven throughout the heating and cooling process during glassmaking?
Last Updated: Apr 09, 2025 |
Topics:
|
Views: 2225
Does colored glass fade?
Last Updated: Apr 09, 2025 |
Topics:
- Conservation
- Science
|
Views: 6500
Are dishes that have the Pyrex stamp with all capital letters made with borosilicate glass?
Last Updated: Mar 25, 2025 |
Topics:
- Pyrex
|
Views: 4767
When did the studio glass movement start in the United States? Can you show me some early examples?
Last Updated: Feb 18, 2025 |
Topics:
- American Glass
- Studio Glass Movement
|
Views: 393
What can you tell me about Corning's role in making the Palomar mirror?
Last Updated: Feb 18, 2025 |
Topics:
|
Views: 851
Could you provide more information on the Blaschka works in your collection?
Last Updated: Feb 18, 2025 |
Topics:
|
Views: 173
Could you help me locate information on Louis Comfort Tiffany's work as a stained glass designer?
Last Updated: Feb 18, 2025 |
Topics:
|
Views: 163

Do I need to log into the Rakow Library catalog to view materials online?
Last Updated: May 13, 2025 |
Topics:
- Library Information
|
Views: 101
Is the library free and open to the public?
Last Updated: Feb 06, 2025 |
Topics:
- Library Information
|
Views: 364
Can I donate materials to the library?
Last Updated: Nov 21, 2023 |
Topics:
- Library Information
|
Views: 260
Can I borrow a book from your library?
Last Updated: Nov 21, 2023 |
Topics:
- Library Information
|
Views: 276
Do you have the ability to lend Library materials outside the United States?
Last Updated: Mar 07, 2022 |
Topics:
- Library Information
|
Views: 180
How can I find digital materials in the library catalog?
Last Updated: Mar 07, 2022 |
Topics:
- Library Collections
- Library Information
|
Views: 278
Does your library lend microfiche/microfilm?
Last Updated: Mar 02, 2022 |
Topics:
- Library Information
|
Views: 207
Are librarians available to help me with my question?
Last Updated: Dec 13, 2021 |
Topics:
- Library Information
|
Views: 197
What does the Rakow Research Library have in its collections?
Last Updated: Jun 08, 2021 |
Topics:
- Library Information
|
Views: 188
Where can I find a glossary of glass terms?
Last Updated: Apr 30, 2020 |
Topics:
|
Views: 249

Please note: The Corning Museum of Glass is a non-profit, educational institute and, as such, cannot answer questions about rarity or value of your glass. For more information about appraisal services, see our curatorial FAQs.

Question *

More Detail/Explanation

Which of the following BEST describes your question? *

Click to choose files or Drag them here.

Provide Your Contact Information

E-mail *

Check to receive an email confirmation of your submission.

Name

State

Country *

Fields marked with * are required.

Contact Us

rakow@cmog.org

(607) 438-5300

(607) 821-4029

Schedule a Virtual Consultation with a Librarian

Schedule a Research Visit

Ask a Glass Question

Browse "Ask a Glass Question" Answers

Ask a Glass Question

Contact Us

Ask a Glass Question Topics to Explore