glen_h Posted December 28, 2017 Share Posted December 28, 2017 It is usual to turn off the safelight when the enlarger is on, not because it will expose the paper, but because it is easier to compose and meter when it is off. Some times have the ability to do that. As far as I know, the only one that is likely to cause problems is with RA-4 paper, which has a dip at an appropriate wavelength, but still some sensitivity. To me, the number 13 should not have "light" in its name. I once dropped paper on the floor, and couldn't find it with the "safelight" on. Dark is more like it. -- glen Link to comment Share on other sites More sharing options...
glen_h Posted December 28, 2017 Share Posted December 28, 2017 The sheet for Endura has the sensitivity curve. It looks like the minimum is around 580nm. http://imaging.kodakalaris.com/sites/prod/files/files/resources/paper-endura-techpub-e4070.pdf -- glen Link to comment Share on other sites More sharing options...
glen_h Posted December 28, 2017 Share Posted December 28, 2017 Number 13 curve is here: http://wwwru.kodak.com/global/en/professional/support/techPubs/ti0845/ti0845m.gif it looks like the absorption minimum is about 590nm, with OD of about 2.5. -- glen Link to comment Share on other sites More sharing options...
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