answersLogoWhite

0

It is a measure of the opacity of smoke.

Ringlemann grid cards run from 0 - all white smoke to 5- all black smoke. See Bureau of Mines Circular ic8333, a link to it is available on the NIOSH site at:

www.cdc.gov/Niosh/mining/pubs/pubreference/outputid330.htm

User Avatar

Wiki User

14y ago

Still curious? Ask our experts.

Chat with our AI personalities

ProfessorProfessor
I will give you the most educated answer.
Chat with Professor
RossRoss
Every question is just a happy little opportunity.
Chat with Ross
TaigaTaiga
Every great hero faces trials, and you—yes, YOU—are no exception!
Chat with Taiga

Add your answer:

Earn +20 pts
Q: What is ringleman number?
Write your answer...
Submit
Still have questions?
magnify glass
imp