This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionSvartlut 76.jpg
English: This picture shows black liquor flowing from a plastic tube
Date
Source
Chemrec AB
Author
Chemrec AB photographer
Licensing
The copyright holder of this file allows anyone to use it for any purpose, provided that the copyright holder is properly attributed. Redistribution, derivative work, commercial use, and all other use is permitted.
Attribution
Captions
Add a one-line explanation of what this file represents