<div dir="ltr">Hi All,<div>Do any of you allow Lead (Pb) deposition on your evaporation tools?</div><div>If so, what are the precautions that you take to avoid Lead exposure hazards during PM,etc?<br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div style="color:rgb(136,136,136)">Thank you,</div><div style="color:rgb(136,136,136)">Youry Borisenkov</div><div style="color:rgb(136,136,136)"><a href="https://cni.columbia.edu/columbia-university-clean-room" target="_blank">CNI</a></div><div style="color:rgb(136,136,136)">Columbia University</div><div style="color:rgb(136,136,136)">CEPSR 1017, New York, NY, 10027, United States.</div><div style="color:rgb(136,136,136)"><a href="https://sustainable.columbia.edu/crown-commuter" style="color:rgb(17,85,204)" target="_blank"><img src="https://sustainable.columbia.edu/sites/default/files/content/crown%20commuter%20badge_0.png" width="96" height="40"></a></div></div></div></div></div>