User blog comment:Xilinoc/Ch. 567 (Rukia be like "I ain't even scared though")/@comment-10554972-20140205203959/@comment-10554972-20140206231446

Morpheus, I'm not sure if I just misunderstood you, but it sounded like you're saying that freezing only relates to water, when in actuality freezing is when any liquid becomes a solid. The reason that Rukia's attacks were all related to water freezing is because it's basically the most prominent liquid. It's true that an ice type Zanpakuto such as Hyorinmaru reduces the temperature of water to become ice, but that is the only thing it can do that with. Sode No Shirayuki makes Rukia's body temperature fall, so she can freeze anything that touches her body. This means that she could freeze things such as oil, lava, mercury, alcohol or glycol (antifreeze), where as Hyorinmaru wouldn't be able to. These liquids are simply seen in fewer quantities than water is.