Reference for Bava Kamma 201:5

היכי דמי אילימא דגזל סמנין ודקינהו ותרנהו וצבע בהן תיפוק ליה משום דקנינהו בשינוי

but if on the other hand the improvement effected by colours is not a [separate] item independent of the wool the defendant might say to him: 'I have nothing of yours with me.' But I would here say: [Even] if the improvement effected by colours is not a [separate] item independent of the wool, why should the defendant be able to say to him: 'I have nothing of yours with me', seeing that the plaintiff can say to him: 'Give me back the pigments of which you have deprived me'?<span class="x" onmousemove="('comment',' And with reference to which you have accordingly become subject to the law of robbery. ');">³</span>

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