I specifically set my recipe to weigh in ounces by 1/10 oz since my scale is only accurate to that degree. I measured several times since this was my first time master batching the oils. So I am nearly positive that everything was weighed accurately (several times). I figured the recipes the day...
So I had a big soap making weekend. I decided to do my first master batch of oils since I was making around 10lbs of soap of various scents and additives. I measured all the oils out before adding to the main pot on double boiler, measured them again right before actually adding to the pot...