What Is a Batch?
A batch is basically a production run of a perfume. The same fragrance can be produced many times over the years, and each production run can have its own batch code. In theory, every batch of the same perfume should smell very similar, but small differences can sometimes happen because of raw material variation, production conditions, aging, or changes in the formula. This is why people sometimes talk about one batch being stronger, darker, fresher, or longer-lasting than another.
What Is Reformulation?
Reformulation is a bigger change. It happens when a brand actually changes the formula of a perfume. This can happen because certain ingredients become restricted, too expensive, unavailable, or because the brand wants to change the performance, smell, or production cost. After a reformulation, the perfume can still keep the same name and bottle, but it may smell or perform slightly differently from older versions. This is especially common with perfumes that have been on the market for many years. An older bottle and a newer bottle of the same fragrance may not be exactly identical. Sometimes the difference is very small, while in other cases it can be much more noticeable.
Why Do Batch Issues Happen?
What we call a “batch issue” is usually related to the performance of a perfume, and most of the time it appears after a reformulation. This does not mean that every reformulation makes a perfume weaker, but some reformulations can noticeably reduce its performance. So if the scent is already good and the performance is good, why would a perfume house reformulate it in the first place? There is a saying in software: “If the code works, don’t touch it.” So why would a perfume house change a fragrance it is already happy with? Is it because they are looking for some new excitement? Of course not. Read the next chapter to find out the answer.