tanTALK - View Single Post - Bronzers in Products.. Dinner conversation with Eric

fungirlz · 04-27-2002, 01:26 PM

Posted: 4/06/02 11:03a
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DHA or Dihydroxyacetone is the most commonly used self-tanner, it was discovered by who else but the Germans, in the 1920’s.

DHA is similar in chemical synthesis to a stain that was used to develop X-ray films, and much like many great discoveries it was developed by mistake.

It was not until 1960 that DHA was really discussed as a possible tanning additive for skin. Some time in the 60’s, Coppertone developed the first cosmetic self-tanner.

DHA is a complex carbohydrate or better known (in loose terms a form of a sugar) it reacts with the skins amino acids, peptides and amines in only the outmost layer of skin, the horny layers. Ever wonder why DHA tans the hands and elbows better than anyplace else on the body, especially better than the face….(the easy answer, and answer most often given is they are dry and the moisture absorbs quicker…Well almost true and it may contribute, however. …Actually it is because the hands and elbows, thanks to evolution for protection purposes are significantly thicker with a much more robust horny layer or Stratum Corneum.)

The reaction with DHA and the amines on your skin first forms pyruvic aldehyde which then through some long chemical sequence that involves keto and aldo reduction…yada yada yada… Already getting boring…..It results in aliphatic linear polymers that many refer to as “melanoidins”.

DHA is fairly reactive and formulating is the key to how well it works or if it is even stable. DHA reacts with amines and acrylates or methacrylates in lotions…Little hint if your bronzer lotion has Triethanolamine or Carbomer listed on the label, chances are you are buying the ingredient name or the “bronzer” concept and the marketing that went with it, because DHA in formulations with these ingredients will react and breakdown the DHA….

If you have any specific questions please feel free to email me or call me directly.

Eric

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Eric T. Dann
Formulated Solutions
1776 11th Ave North
Saint Petersburg, FL 33713
etdann@formulatedsolutions.com
Tanning Division: Technique Laboratories
Salon Products, Sold Only Through Salons

Posted in Skin care Topic..
How long has self tanners been around..

04-27-2002, 01:26 PM	#3 (permalink)
fungirlz Join Date: Jan 17 2002 Posts: 4,753 Rep Power: 8	Posted: 4/06/02 11:03a -------------------------------------------------------------------------------- DHA or Dihydroxyacetone is the most commonly used self-tanner, it was discovered by who else but the Germans, in the 1920’s. DHA is similar in chemical synthesis to a stain that was used to develop X-ray films, and much like many great discoveries it was developed by mistake. It was not until 1960 that DHA was really discussed as a possible tanning additive for skin. Some time in the 60’s, Coppertone developed the first cosmetic self-tanner. DHA is a complex carbohydrate or better known (in loose terms a form of a sugar) it reacts with the skins amino acids, peptides and amines in only the outmost layer of skin, the horny layers. Ever wonder why DHA tans the hands and elbows better than anyplace else on the body, especially better than the face….(the easy answer, and answer most often given is they are dry and the moisture absorbs quicker…Well almost true and it may contribute, however. …Actually it is because the hands and elbows, thanks to evolution for protection purposes are significantly thicker with a much more robust horny layer or Stratum Corneum.) The reaction with DHA and the amines on your skin first forms pyruvic aldehyde which then through some long chemical sequence that involves keto and aldo reduction…yada yada yada… Already getting boring…..It results in aliphatic linear polymers that many refer to as “melanoidins”. DHA is fairly reactive and formulating is the key to how well it works or if it is even stable. DHA reacts with amines and acrylates or methacrylates in lotions…Little hint if your bronzer lotion has Triethanolamine or Carbomer listed on the label, chances are you are buying the ingredient name or the “bronzer” concept and the marketing that went with it, because DHA in formulations with these ingredients will react and breakdown the DHA…. If you have any specific questions please feel free to email me or call me directly. Eric -------------------- Eric T. Dann Formulated Solutions 1776 11th Ave North Saint Petersburg, FL 33713 etdann@formulatedsolutions.com Tanning Division: Technique Laboratories Salon Products, Sold Only Through Salons Posted in Skin care Topic.. How long has self tanners been around..