MadSci Network: Chemistry

Subject: What kinds of dyes fade more in sunlight?

Date: Tue May 24 22:31:02 2005
Posted by Diane
Grade level: 7-9 School: Einstein Middle School
City: Shoreline State/Province: Washington Country: US
Area of science: Chemistry
ID: 1116991862.Ch

I'm doing a science fair project testing natural dyes (grape juice, cranberry 
juice, tomato juice, carrot juice) in sunlight to see which ones fade more. I 
was wondering if i could get some background information about these dyes and 
how they fade to make an accurate hypothesis (what makes certain ones fade 
more than others). (I am dying cotton fabric in these dyes and setting them 
out in sunlight). Please contact me as SOON as possible please. THANK YOU!

Re: What kinds of dyes fade more in sunlight?

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