<div>RMB wrote:</div>
<div> </div>
<div>>> Tearing toilet paper is not<br>normally derabbanan. AIUI, if torn on the perforations, one is tearing<br>to size and that's deOraisa. Rather, one must either tear kel'acheir<br>yad, or make sure not to tear on the lines. <<</div>
<div> </div>
<div>R' Shlomo Zalman is Meikil on the Mechatech issue in this, and many other scenarios, because he holds that one must want *that particular size* to violate Mechatech. If the company would put the perforations a bit higher or lower, it wouldn't make any difference to you. (In fact, I don't like where they put it at all.)</div>
<div> </div>
<div>But qorei'a is an issue, and it is qoreia Al Menas Lesaken, which is Deorysa according to most Poskim (some say we need Koreia Al Menas Litpor Davka). </div>
<div><br>>> But I don't know about facial tissues. Is the need for one also<br>considered a sufficient kavod haberi'os issue? << </div>
<div> </div>
<div>I think it is if one is going to have to wipe his Ni'a on his sleeve (which is problematic on Shabbos anyhow). If one is going to have to blow his nose into his hand and wash it off in the sink, (which I've seen people do even with tissues around), I'd think it is subjective. A distinguished member of a community or a Rov can't be seen doing something like that.</div>
<div> </div>
<div> And for sure if it is going to drip out of his nose it is under kavod Habriyos. See Rashi to Shabbos 81b that even having something visibly stuck between your teeth is an issue of Kavod Habriyos. RSZA is lenient even on taking medicine is such a case when the Ni'a is leaking from his nose and is an issue of Kavod Habriyos (brought in a footnote in SSK).</div>