Reference for Bava Kamma 201:3
ומודה רבי מאיר אם נתן עצים לחרש לעשות מהן כסא נאה ועשה מהן כסא כעור ספסל נאה ועשה ספסל כעור אם השבח יתר על היציאה נותן לו דמי היציאה ואם היציאה. יתירה על השבח נותן לו דמי השבח:
It was asked: Is the improvement effected by colours a [separate] item independent of the wool, or is the improvement effected by colours not a [separate] item independent of the wool? How can such a question arise in practice? The case can hardly be one where a man misappropriated pigments and after having crushed and dissolved them he dyed wool with them, for would he not have acquired title to them through the change which they underwent?<span class="x" onmousemove="('comment',' And the whole liability upon him would be to pay the original value of the dyes as supra p. 541. ');"><sup>1</sup></span>