File:Government discovers method to preseve film. Folding endurance test, The flexibility is measured in this folding endurance tester. A strip of film is folded back and forth under tension LCCN2016873782.jpg
Original file (10,106 × 8,044 pixels, file size: 8.67 MB, MIME type: image/jpeg)
Captions
Summary edit
Warning | The original file is very high-resolution. It might not load properly or could cause your browser to freeze when opened at full size. |
---|
DescriptionGovernment discovers method to preseve film. Folding endurance test, The flexibility is measured in this folding endurance tester. A strip of film is folded back and forth under tension LCCN2016873782.jpg |
English: Title: Government discovers method to preseve film. Folding endurance test, The flexibility is measured in this folding endurance tester. A strip of film is folded back and forth under tension until it breaks, and the number of folds it withstands is counted. Three types of films have been studied, termed accoring to the chemical process of making them, acetate, viscose, and nitrate. The acetate base proved to be very stable on heating and is considered suitable for permanent records if properly made. The nitrate base became brittle quite raipidly and is considered unsuited for record purposes. The viscose base is in an intermediate position similar to that of record papers made from ordinary bleach wood fiber, 7/8/38
Abstract/medium: 1 negative : glass ; 4 x 5 in. or smaller |
||
Date | |||
Source |
Library of Congress
|
||
Author | Harris & Ewing, photographer | ||
Permission (Reusing this file) |
No known restrictions on publication. For more information, see Harris & Ewing Photographs - Rights and Restrictions Information https://www.loc.gov/rr/print/res/140_harr.html
|
||
Other versions |
|
||
Collection InfoField | Harris & Ewing Collection | ||
Notes InfoField |
|
||
Part of InfoField | harris & ewing collection · prints and photographs division | ||
Subject InfoField | glass negatives | ||
Genre InfoField | Glass negatives |
Licensing edit
Public domainPublic domainfalsefalse |
This work is from the Harris & Ewing collection at the Library of Congress. According to the library, there are no known copyright restrictions on the use of this work. |
Public domainPublic domainfalsefalse |
This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
العربية ∙ беларуская (тарашкевіца) ∙ čeština ∙ Deutsch ∙ Ελληνικά ∙ English ∙ español ∙ français ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ Nederlands ∙ português ∙ русский ∙ sicilianu ∙ slovenščina ∙ ไทย ∙ Tiếng Việt ∙ 中文(简体) ∙ 中文(繁體) ∙ +/− |
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 13:52, 8 June 2018 | 10,106 × 8,044 (8.67 MB) | Fæ (talk | contribs) | LOC upscale 1,024 × 815 → 10,106 × 8,044 | |
10:58, 18 March 2018 | 1,024 × 815 (132 KB) | Fæ (talk | contribs) | Library of Congress Harris & Ewing Collection 1938 LCCN 2016873782 jpg # 20,876 / 41,540 |
You cannot overwrite this file.