Shop Wholesale Solid Volume Base Toner. A solid volume base toner is a skincare product, specifically the KoY Solid Volume Base Milk Toner, known for its nourishing, milk-like texture and hydrating properties. It is designed to deeply moisturise, improve skin elasticity, and prepare the skin for other skincare products. The "solid volume base" likely refers to its rich, concentrated formula that provides significant moisture and creates a foundation for a plump, supple complexion. 

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