Yellow Dye To Slow Down Blue Sensitivity ??

[wildbillbugman]

Hello to Everybody,
My current Emulsions, based upon Silane-Functional PVA, shows good sensitivity to Green and Red. But the Blue is "off the charts". I am using KODAK Q-60 TRANSPARENCY AND REFLECTIVE Color charts for judgement. I have read of the use of yellow dye in emulsions. I am think - ing that it may slow down my Blue sensitivity,and bring it to equal red and green.
For a change,. I am asking before trying.
Bill

 

[dwross]

Hi Bill,

My opinion: You'd be much better off using a yellow filter over your lens. You can add yellow dye directly to the emulsion (standard yellow food coloring happens to be the right dye), but that would add an unnecessary variable to your emulsion. It would take quite a few trials to know how much to add. If you want to experiment with different strengths of yellow filters without having to buy them all, you could make your own filters. Good luck! Fun!

http://www.thelightfarm.com/cgi-bin/htmlgen.py?content=25Jan2012

 

[wildbillbugman]

Thank You Denise ? For some stupid reason I did not even think of a yellow filter. But once I get my formula balanced, the next step is to use it in my Tri-color camera. That has RGB filters. I could have a filter made that "combines" blue and yellow.
Bill

 

[Photo Engineer]

Bill, Tartrazine is commonly used to control blue speed. It is easily dissolved out of the material when you process it.

PE