Rose Petal turns dark after put into soap

[lukelee]

I put some red dried rose petals on the surface of cp soap trace, but after a few weeks, they all turned to dark color.
How to keep the rose petal in red color?

 

[soap_rat]

I have not had any luck with that. I even tried hot process, where the soap is cooked to completion, then added the rose petal--still turns brown. It turns out that the anthocyanins that color flowers and fruits red, pink, purple, blue etc. are very reactive to pH, and finished soap still has a rather high pH.

 

[Lindy]

Unfortunately they simply do and I've not ever heard of anyone having luck with that. There are a few flowers that will keep its colour in soap. Calendula & Blue Malva both hold up well.

 

[lukelee]

I saw this photo:

 

[paillo]

I've had no luck with anything except calendula petals. The blue malva looks really interesting! (But expensive, maybe I'll try to grow some).

A couple of years back I tried cornflowers. The color held up longer than most petals, but they too eventually turned brown, alas.

 

[Genny]

I've seen lots of pictures of bright colored rose petals on soap. So finally I asked someone how they keep them from going brown. There answer, "Oh, they turn brown, we just take the picture right away while the flowers are still pink."