Completing a Word by Zipping Clothing on Shabbat
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Question
Zipping a hoodie with a text on it. Zipping it up will complete the text. Is it allowed on Shabbat? There are 2 types: 1. Text where one of the letters is on the zipper, so zipping it up creates a letter. 2. A word written half here and half there, and zipping it up only completes the word. Attaching a generated image for understanding the issue.
Answer
Hello Rabbi
It is permitted to use such a sweater if he has no other sweater.
Source
Mishna Berura, Siman 340, Se'if Katan 17
And a book that has letters or words written on the edges of its pages, some prohibit opening and closing it on Shabbat because opening breaks the letters and is considered erasing, and closing is like writing. However, the opinion of the Rema in his response is to permit this, and so is the opinion of many later authorities, etc., and this is the custom. Nevertheless, it is proper to be stringent if he has another book:
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