TD colored bar turning brown overtime?

[strawberryred]

I made a batch of soap colored with TD that had swirls of purple and pink in it and it was great for about 3 months, and then the whole bar started turning brownish. It's almost like the TD faded. It was a nice snow white color at first, with the light colors, but now it just looks horrid. It has been about 7 or 8 months since I made it, but I thought it would last longer than that? Has this ever happened to anyone else?

Oh and I used Lard, OO, CO, and Caster as my oils. I don't think it's DOS, since I didn't get any spots first, it just kind of all turned brownish.

 

[IrishLass]

Did you happen use a fragrance oil with any vanilla in it perchance? If so, the fragrance is the most likely culprit. Even if you add gobs of TD to a soap fragranced with an FO that has an appreciable amount of vanillin it, it will discolor to tan or brown eventually in spite of your efforts. Some companies make a product called Vanilla Stabilizer to combat this common problem, but I've never used it. My strategy so far has been to just avoid using discoloring FOs instead.


IrishLass

 

[Lindy]

I've actually used Vanilla stabilizer and I found even that doesn't hold the brown off for long... I always check the vanilla content when looking at a fragrance so I know what to expect. The other thing I do is add fragrance to the coloured parts of my soap so my white stays white...

I'm really sorry this happened to you...

 

[strawberryred]

Hmm, I used a Sweet Pea fragrance, and it doesn't list any vanilla, but maybe that is it.

I'm really sorry this happened to you...

Thanks! It's all a learning experience though, right? I'm just trying to figure out why it happened so I won't repeat it!

 

[Genny]

I've used Sweet Cake's Sweet Pea that turns brown eventually. That's the only Sweet Pea I've used that discolors.

 

[IrishLass]

For a good Sweet Pea that doesn't turn tan/brown, try Peak's. It's a wonderful Sweet Pea-- it's nice and strong and behaves well.

IrishLass