Mishnah for Kelim 21:1
הַנּוֹגֵעַ בַּכֹּבֶד הָעֶלְיוֹן, בַּכֹּבֶד הַתַּחְתּוֹן, בַּנִּירִים, וּבַקֵּירוֹס, וּבְחוּט שֶׁהֶעֱבִירוֹ עַל גַּבֵּי אַרְגָּמָן, וּבְעִירָה שֶׁאֵינוֹ עָתִיד לְהַחֲזִירָהּ, טָהוֹר. בְּנֶפֶשׁ הַמַּסֶּכֶת, וּבַשְּׁתִי הָעוֹמֵד, וּבְכָפוּל שֶׁהֶעֱבִירוֹ עַל גַּבֵּי הָאַרְגָּמָן, וּבְעִירָה שֶׁהִיא עֲתִידָה לְהַחֲזִירָהּ, טָמֵא. הַנּוֹגֵעַ בַּצֶּמֶר שֶׁעַל הָאִימָּה, בָּאַשְׁוָיָה, טָהוֹר. הַנּוֹגֵעַ בַּפִּיקָה, עַד שֶׁלֹּא פֵרְעָהּ, טָמֵא. מִשֶּׁפֵּרְעָהּ, טָהוֹר:
One who touches the upper beam [of a loom], the lower beam, the heddles, the warp fringe, the thread that they draw over the purple material, or thread on the shuttle which will not be woven in, remains pure. [If he touches] the woof, the standing warp, the double thread that is drawn over purple material or thread on the shuttle that will be woven in, he becomes impure. One who touches the wool that is on the distaff, or on the spool, he remains pure. If he touches the spindle's coil: Before it was uncovered he is impure; after it was uncovered he remains pure.