My theory is that the more pigment there is in the lipstick and it doesn't dry the lips too much, then the price goes up. Unfortunately, based on experience, even in the premium department stores, there are limited options when you're searching for both true comfort and color payoff.
However, there are some affordable brands which have a pretty good level of pigment already, with nice selection of colors, AND with great comfort / wearability which is clear with semi-matte and glossy lipsticks that are available in the nearest department stores or beauty distributor.
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