And while we are on the topic of conformal coating - does anyone out there have a definitive on how long an OV filter will last (number of usage hours logged) on a respirator mask when using conformal coating?  One type of CC that we use has Toluene (TDI) and we really want to protect our employees that spray from that stuff.



Or do you recommend an air supply respirator?



Thanks in advance,

Karen H.A. Capps

TeligentEMS

 

www.teligentems.com

 Please consider the environment before printing this e-mail





-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge

Sent: Thursday, August 20, 2009 2:18 PM

To: [log in to unmask]

Subject: [TN] Manual spraying



Good Evening,

we use small cans filled with 1B1 conformal coating for handspraying boards. 

The guys are not satisfied with the result, because sometimes the result is 

matte. Microscope photos show thousands of microscopic bubbles in the 

coating. I suspect that it's included driving gas. Or wrong handling the 

spray can.Anyone out there with experience? How do you avoid this problem?

/Inge 



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