What is…

Plain definitions of the product categories, written for someone deciding whether they need the thing at all.

Plain definitions, written for someone standing in a shop deciding whether they need the thing at all. Each page says what the product is, what it replaces, and the case where it is genuinely unnecessary.

Product categories are named by marketing, not by chemistry, so two things with the same label often do different jobs. These pages separate the label from the function.

Where a category is largely a repackaging of something cheaper, that is stated rather than implied.

Each link goes to a dedicated page written for that case.

What is…

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