Liturgy for Niddah 122:19

מנא ליה לסבא הא

Rafram b. Papa citing R. Hisda ruled: A garment in which kil'ayim was lost may be dyed<span class="x" onmousemove="('comment',' As the colour effect of dye on wool is different from that on flax the one could be distinguished and separated from the other. ');">¹⁶</span>

Seder Ma'amadot