Some pink poly left mark on lcd screen.   majority do left something, you just not look or detect closely.  

Sent from my BlackBerry 10 smartphone.
  Original Message  
From: Stadem, Richard D.
Sent: Wednesday, June 21, 2017 11:01
To: [log in to unmask]
Reply To: TechNet E-Mail Forum
Subject: Re: [TN] Coating Boots/Caps/Plugs

Not all silicone-bearing products will contaminate product or worksurfaces.
Silicone-bearing plastics may be perfectly safe if the silicone is tightly bound as part of the material. It needs to be evaluated on a case-by-case basis.
For example, pink poly commonly used for temporary packaging of some ESD parts is verboten in our factory because most of them contain silicone that is not tightly-bound and can contaminate everything it comes in contact with.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Wettermann
Sent: Wednesday, June 21, 2017 8:55 AM
To: [log in to unmask]
Subject: [TN] Coating Boots/Caps/Plugs

All:

After the last discussion of masking tape I happened to be involved soon thereafter in a time study of using re-usable "boots"/"caps"/"plugs" to protect components in the conformal coating process.

Like most who perform coating we spend an AWFUL lot of time masking and demasking in these projects and are always looking for the best method.

We have used the silicone-based boots and have been successful on larger repeated projects to use them 250-300X. They are fine for spray coating for medium density boards.

The time to mask and demask ,depending on the complexity of the part and coating being applied as well as the application method determines whether or not the boots make sense. We are partial to the silicone-based boots (though with the caveat described in the previous posting about trying to get silicone out of the shop-especially for medical applications).

I am wondering if there have been any favorite materials for these boots amongst the coating community other than silicone? If so how do you find the boot matches your process and actually derives the time-savings benefit.

Thanks

--
Bob Wettermann
BEST Inc