כלים ל׳Kelim 30

Mishnah 1א׳

כְּלֵי זְכוּכִית, פְּשׁוּטֵיהֶן טְהוֹרִין, וּמְקַבְּלֵיהֶן טְמֵאִים. נִשְׁבְּרוּ, טָהָרוּ. חָזַר וְעָשָׂה מֵהֶן כֵּלִים, מְקַבְּלִין טֻמְאָה מִכָּאן וּלְהַבָּא. הַטַּבְלָא וְהָאִסְקוּטְלָא שֶׁל זְכוּכִית, טְהוֹרִין. אִם יֶשׁ לָהֶן לִזְבֵּז, טְמֵאִים. שׁוּלֵי קְעָרָה וְשׁוּלֵי אִסְקוּטְלָא שֶׁל זְכוּכִית שֶׁהִתְקִינָן לְתַשְׁמִישׁ, טְהוֹרִין. קִרְטְסָן אוֹ שָׁפָן בְּשׁוּפִין, טְמֵאִין:

Regarding glass vessels, those that are flat are pure [i.e. insusceptible to being rendered impure], and those that have receptacles are [susceptible to being rendered] impure. If they are broken, they become pure; if one then went back and fashioned them into vessels, they are able to retain impurity from then and onward. A tray or a flat dish made of glass are pure [i.e. insusceptible to impurity]; if they have a rim, they are [susceptible to being rendered] impure. The [concave] bottoms of a glass plate or a flat dish which one adapted for use [as receptacles] are pure. If one polished them or sanded them with a file, they are [susceptible to being rendered] impure.

Mishnah 2ב׳

אַסְפַּקְלַרְיָא, טְהוֹרָה. וְתַמְחוּי שֶׁעֲשָׂאוֹ אַסְפַּקְלַרְיָא, טָמֵא. וְאִם מִתְּחִלָּה עֲשָׂאוֹ לְשֵׁם אַסְפַּקְלַרְיָא, טָהוֹר. תַּרְוָד שֶׁהוּא נוֹתְנוֹ עַל הַשֻּׁלְחָן, אִם מְקַבֵּל כָּל שֶׁהוּא, טָמֵא. וְאִם לָאו, רַבִּי עֲקִיבָא מְטַמֵּא, רַבִּי יוֹחָנָן בֶּן נוּרִי מְטַהֵר:

A mirror is pure. A cauldron which one fashioned into a mirror is [susceptible to being rendered] impure but if from the outset it was made to serve as a mirror, it is pure. Regarding a large [glass] spoon which one places on a table, if it can hold any amount [when it stands on its own], it is [susceptible to being rendered] impure; but if not, Rabbi Akiva considers it [susceptible to being rendered] impure, and Rabbi Yohanan ben Nuri considers it pure [i.e. insusceptible].