I am confused about what colorants to use in my HP soap. I am still learning with LTHP. I was told that the best option is for a concetrated liquid FD&C approved that can be diluted with water. It then can be added to the essential oil and then added to the soap after trace.. But I have also seen people use powdered colorants.. It was recommended to avoid powered colorants because it may not blend completely or cause other issues. I dont know what is the best type of colorant or the best time to add it during the process. Any help would be appreciated.