Why does grease turn paper clear?

paper is pulpified wood that's dried into thin sheets. Any liquids (grease, water, etc) will soak into the mix and separate the fibers, causing it to become transparent. Except with water, it will ultimately evaporate out. Grease doesn't evaporate away at room temperature like water does, so the transparency remains.Why does grease turn paper clear?
Hi. It fills in the volume between the fibers and makes it translucent. Normally the fibers scatter light.

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