Jump to content

Talk:CR-39

Page contents not supported in other languages.
From Wikipedia, the free encyclopedia

What does "39" refer in the cr-39 term? Is this still made in where you said by the company you said? Is it made anywere else in the world?


PPG still makes CR-39 lenses, AOLite also makes tons of cr39 (as hard resin) lenses, it's a pretty popular optical material in eyeglass labs, and it could easily be argued, is optically superior to polycarbonate in many ways. It is definately made elsewhere in the world, it is still made by PPG, and its use is ubiquitous, surface techs sometimes plan their days around it (at least, I have) —Preceding unsigned comment added by 68.126.21.207 (talk) 06:05, 12 October 2007 (UTC)[reply]

There are two other companies manufacturing ADC for use in the same application - Acomon AG in Italy and Danyang Yueda FineChemichal Co in China

Catalyst-vs-intiator

[edit]

I changed the IPP section to say that it is an initiator and not a catalyst. The IPP is consumed as part of the reaction, and does not simply act as an intermediary like a catalyst would. Anyone care to delve into that a bit more? David Casale 15:27, 23 December 2009 (UTC)


Monomer?

[edit]

The PPG website says that their CR-39 product is a monomer used to create polymers used in eyeglasses. This article currently needs clarifications. --Charles Gaudette (talk) 03:03, 28 December 2007 (UTC)[reply]


anti scratch

[edit]

what about anti scratch added treatment ? —Preceding unsigned comment added by 95.246.106.181 (talk) 12:55, 7 March 2010 (UTC)[reply]

[edit]

Hello fellow Wikipedians,

I have just modified one external link on CR-39. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).

  • If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
  • If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 10:36, 22 December 2017 (UTC)[reply]

poly

[edit]

Poly made up by 202.148.60.86 (talk) 17:32, 5 February 2024 (UTC)[reply]