Guest guest Posted January 21, 2004 Report Share Posted January 21, 2004 > Have you ever seen a silky lotion without water in it? The main > ingredient is Isopropyl Myristate. I haven't. What else is in the product? Maurice Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 21, 2004 Report Share Posted January 21, 2004 > Have you ever seen a silky lotion without water in it? The main > ingredient is Isopropyl Myristate. I haven't. What else is in the product? Maurice Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 21, 2004 Report Share Posted January 21, 2004 It contains Isopropyl Myristate, Cetearyl Alcohol, Ceteareth 20, Caprylic/Capric Glycerides, Dimethicone, Steryl Alcohol, Soybean Oil, Shea Butter, Sunflower Oil, Hydrolyzed Silk, Aloe Vera Juice, Disodium EDTA, olidinyl Urea, Benzophenone 4 and Iodopropynl Butylcarbamate. I was purchasing a base lotion from my supplier and they replaced it with this lotion. Not having any water in it struck me funny. I asked them it this was correct and they told me that these are the correct ingredients. Until I can get my own base lotion formula worked out I am purchasing theirs. Is there a way to duplicate a lotion by just having the ingredients??? Cosmeticinfo , " Maurice Hevey " <maurice@C...> wrote: > > > Have you ever seen a silky lotion without water in it? The main > > ingredient is Isopropyl Myristate. > > I haven't. What else is in the product? > > Maurice Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 21, 2004 Report Share Posted January 21, 2004 > Is there a way to duplicate a > lotion by just having the ingredients??? When you have an accurate ingredient list, duplication can be difficult. In this case, the ingredient list is wrong so the chances of duplicating the product are next to impossible. You should determine the percent solids or percentage of water. When I'm trying to duplicate a formula, one of the first things that I do is determine the amount of water in the formula. If you know how much water is in the formula you can calculate the percent solids. This number is important when you want/need to duplicate any formula. Laboratories have special ovens and devices to determine the percent solids in a product. But you can do the same thing using your oven. Step 1) find 3 or 4 small weighing boats. I use small aluminum weighing boats. Weighing boats are usually shallow containers that are made out of plastic, glass or aluminum. I like to use aluminum when I'm doing a percent solids because it won't melt in the oven and they are disposible. In the home, you can use small shallow Pyrex bowls or even clean metal caps from old jars would work. Step 2) Determine the weight of each weighing boat. This is the Tare Weight. Step 3) Add a small amount of your unknown product to each boat. Step 4) re-weigh the weighing boats with the product. This is the Gross Weight. Now with a little math, we can tell how much product is in each weighing boat. This is the net weight. Weighing Boat 1 w/o product = 9.7 grams (aka Tare Weight) Weighing Boat 1 w/ product = 15.2 grams (aka Gross Weight) So, the amount of unknown product in Weighing Boat 1 is equal to the weight of Weighing Boat 1 w/ product minus the weight of Weighing Boat 1 w/o product or 15.2 grams - 9.7 grams = 5.5 grams. This is also called the Net Weight. So that means that Weighting Boat 1 contains 5.5 grams. You should repeat steps 1 through 4 at least three or four times so that you will have Weighing Boats 1 through 4. Step 5) Next put these weighing boats on a cookie sheet and put into oven set at 195F. Step 6) After 3 to 4 hours of heating, remove samples from the oven and re-weight the weighing boats to see how much water is lost. Here's a real life example. I wanted to duplicate a shampoo and need to know how much water was used in the formula. I did the testing in triplicate. BEFORE HEATING SAMPLE 1 Tare Wt = Weighing Boat 1 empty = 1.27 grams Gross Wt = Weighing Boat 1 w/ shampoo = 7.14 grams Net Weight = (Gross Wt - Tare Wt) = 7.14g - 1.27g = 5.87 grams SAMPLE 2 Tare Wt = Weighing Boat 2 empty = 1.26 grams Gross Wt = Weighing Boat 2 w/ shampoo = 6.48 grams Net Weight = (Gross Wt - Tare Wt) = 6.48g - 1.26g = 5.22 grams SAMPLE 3 Tare Wt = Weighing Boat 3 empty = 1.27 grams Gross Wt = Weighing Boat 3 w/ shampoo = 8.97 grams Net Weight = (Gross Wt - Tare Wt) = 8.97g - 1.27g = 7.7 grams AFTER HEATING SAMPLE 1 Tare Wt = Weighing Boat 1 empty = 1.27 grams Gross Wt = Weighing Boat 1 w/ shampoo = 2.17 grams Net Weight = (Gross Wt - Tare Wt) = 2.17g - 1.27g = 0.9 grams SAMPLE 2 Tare Wt = Weighing Boat 2 empty = 1.26 grams Gross Wt = Weighing Boat 2 w/ shampoo = 2.06 grams Net Weight = (Gross Wt - Tare Wt) = 2.06g - 1.26g = 0.8 grams SAMPLE 3 Tare Wt = Weighing Boat 3 empty = 1.27 grams Gross Wt = Weighing Boat 3 w/ shampoo = 2.46 grams Net Weight = (Gross Wt - Tare Wt) = 2.46g - 1.27g = 1.19 grams By heating these samples, we have evaporated all the water and all that remains are the other chemicals called solids. If we know the weight before heating and the weight after heating, we can calculate the percent solids for each sample, then we can calculate the average percent solids. SAMPLE 1 5.87 grams = 100% 0.9 grams = % solids % solids = (0.9 x 100)/5.87 % solids = 15.3% SAMPLE 2 5.22 grams = 100% 0.8 grams = % solids % solids = (0.8 x 100)/5.22 % solids = 15.3% SAMPLE 3 7.7 grams = 100% 1.19 grams = % solids % solids = (1.19 x 100)/7.7 % solids = 15.5% The average % solids is equal to 15.4 Therefore the product being tested in this example contains about 85% water. Once we know how much water there is in the formula, we can esitmate the size of the oil phase. Maurice Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 21, 2004 Report Share Posted January 21, 2004 Thanks Maurice!!! I think I will try this with a lotion I have that I love! Will keep you posted on what I find out. Quote Link to comment Share on other sites More sharing options...
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