Guest guest Posted October 16, 2001 Report Share Posted October 16, 2001 Hello, I have learned a lot on this list and am grateful for its presence, even though I've not posted til now. Has there been any discussion of Benzophenones (-3, in particular) ? I wasn't able to locate any in the files. I am finding that the dyes I am using for my M & P soaps are not lightfast as I would like and wondered about the pros and cons of this ingredient as a UV inhibitor. Can anyone direct me to a previous discussion of this or perhaps comment? Thanks in Advance, S. Laycock Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 16, 2001 Report Share Posted October 16, 2001 Has there been > any discussion of Benzophenones (-3, in particular) ? Hi, There are many Benzephenone's available - 3 is oil soluble. It does work but you will have to experiment to find the level that is right for each product. I would make up samples with different amounts like .25%, .50%, 1.0%, and leave it in a window for a few months. (Keep a control sample in a dark place for comparison). Unfortunalty, there is no way to speed up a light stability test. Jen Quote Link to comment Share on other sites More sharing options...
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