Reference for Bava Kamma 201:4

איבעיא להו יש שבח סמנין על הצמר או אין שבח סמנין על הצמר

— No; the query could have application only where he misappropriated pigments already dissolved and used them for dyeing, so that if the improvement effected by colours is a [separate] item independent of the wool the plaintiff might plead: 'Give me back the dyes which you have taken from me',<span class="x" onmousemove="('comment',' Since his dyes form now an integral part of the defendant's wool. ');">²</span>

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