Beet sugar juices are the aqueous beet-sugar solutions produced while processing sugar-beet roots. Raw juice comes from direct hot-water extraction (diffusion) of the sliced roots and contain beet sugar together with impurities such as proteins, pectins, and minerals. Thin juices are purified beet sugar solutions after liming, carbonation, and filtration, while thick juice results from concentrating thin juice in multiple-effect evaporators. Each stage is monitored for purity, colour, and Brix before crystallization, since impurities carried forward reduce sugar yield and quality. Precise control of this juice cascade is the heart of efficient beet sugar manufacture.