It occurs when the temperature changes around the lipstick, causing emollient ingredients to come to the surface and create tiny droplets of liquid. It usually happens with creamier formulas, which means that even the most sophisticated products can suffer from it. Contrary to what we thought, those little droplets that surround your bullet aren't water at all. When the oils or waxes in the formula are partially compatible or not compatible, Rosario says they will begin to separate over time.
However, a drastic change in climate can cause these conditions to occur sooner. If a lipstick is prone to sweating, it will continue to do so as it ages or when exposed to heat. In my experience, the creamier the lipstick, the sweatier it is when it arrives, My Bite lipsticks always arrive like this. I recently bought Too Faced lipsticks that were much worse.
That's why I prefer to have them in the store. Bite lipsticks, in particular, sweat more frequently than other brands because of their natural food-grade ingredients. It's totally normal and there's nothing to worry about. Sweating on lipsticks is quite common and not many people bother to check it out, but in reality brands are required to review the items in question for you.
There is still a lot to learn and it is hoped that these notes will help the future development of lipsticks. Being the bargain buyer that I am, I often buy lipsticks (and a bunch of other items) when they go on sale or have a large GWP offer attached. According to Rosario, you don't have to worry about sweating from lipstick, but you might want to pay attention to it. One by one, I picked up each lipstick (even the new ones if they had stains or sweat) by sticking the bullet in the alcohol keeping the handle face down for ten seconds.
Yes, it's definitely normal for lipsticks and other cream products to form cosmetic sweat when exposed to heat during shipping and storage. Increasing the melting point of the mass with high melting point waxes can decrease the firmness of the lipstick. It's hard to tell which lipsticks might have a greater tendency to sweat: “It all comes down to the compatibility of all the components of the formula,” Rosario says. You can pour this melted lipstick into a container and refrigerate it until solid, but Rosario points out that it most likely won't work the same as the initial lipstick.
Slow cooling lipstick reduces the amount of crystallization compared to a conventional production process. One was for lipsticks that looked good, but I wasn't sure if they were used, another for lipsticks with stains, another for lipsticks with obvious sweat, and a last one for lipsticks that were definitely used. In the case of flamed lipstick, sweating was delayed and the wax matrix was much thicker than that of the unflamed pencil. When stored in proper conditions (dark and cool places), lipsticks should not sweat, but they will sweat in hot, humid weather or if stored in warm rooms.