此句中which指代什么

问题描述:

此句中which指代什么
All paints consist of two parts.One is a powder of solid particles that is the source of the color and the opaqueness and is known as the pigment.The other,called the binder,is the liquid into which the pigment is blended.
最后一句里的which指代什么啊,这算是什么从句呢

这是以个定语从句,先行词是liquid,引导词是“介词+关系代词”的结构,其实后面的定语从句就是the pigment is blended into which (the liquid)