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Yep, 3% would be a good place to start @AIME :thumbsup:
@gymrat I want to DIY a lightening lotion..this is my first time..do you know of any good sites to help me come up with formulations & how do I know the percentage of powder I'm adding in & what to mix it on as a base?
@GlowyGoddess002

A lightening lotion with KA? Or do you have other things in mind? Are you in need of ingredients or do you have them? What you want to do is look at each ingredient and go by their individual "usage rate". So for KA recommended usages is 1-3%. So you could use 3% and add a base lotion to finish the rest or other ingredients of your choice.

http://www.makingcosmetics.com/Kojic-Acid_p_284.html
Kojic Acid Use: Recommended concentration 1-3%.
 

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@GlowyGoddess002

A lightening lotion with KA? Or do you have other things in mind? Are you in need of ingredients or do you have them? What you want to do is look at each ingredient and go by their individual "usage rate". So for KA recommended usages is 1-3%. So you could use 3% and add a base lotion to finish the rest or other ingredients of your choice.

http://www.makingcosmetics.com/Kojic-Acid_p_284.html
Kojic Acid Use: Recommended concentration 1-3%.
I wanted to try it with niacinamide or mulberry ...how do I know what percentage it is?? I don't have the ingredients, I have to buy them and the base lotion
 

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I wanted to try it with niacinamide or mulberry ...how do I know what percentage it is?? I don't have the ingredients, I have to buy them and the base lotion
Ok so with each you would look at their description and each ingredient has a "usage rate". So look at B3 below......

http://www.lotioncrafter.com/vitamin-b3-niacinamide-usp.html
Recommended Usage: 1-6%

So you can use this up to 6% in your recipe, so 94% would be base lotion or serum base. If you wanted to add mulberry to it you could, following its usage rate.
http://www.makingcosmetics.com/Mulberry-Root-Extract_p_17.html
Recommended Usage: 3 - 5%.

Am I making any sense to you at all?? If not please tell me and I will explain another way so you fully understand. The main thing is making sure your using water soluble ingredients, which these are........if they were oil soluble
they would not dissolve in water base products.

Sorry not sure why the font is jumping all over the place.........I'm trying to type and watch The Voice finale
:p Apparently I am not doing so well multitasking tonight ;)
 

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I was able to melt the kojic acid powder in rose water using the double boiler method. The issue I have I don't know if it's working. Also, I added kojic acid to black soap I do not know if it's working why because I feel I saw better result with kojie san. However, I bought kojie san again and did not get the initial result I received before.

Compounding the lotion is easy I think is buying the real stuff that is the issue.
 
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