Cheaper ESD grades of pink poly can exude their impregnated "ESD stuff" as 
well having a silicone style release compound.
Mike

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--- Original message ---
From: Joyce Koo <[log in to unmask]>
Sent: 21 June 2017 17:04:54
To: [log in to unmask]
Subject: Re: [TN] Coating Boots/Caps/Plugs

> 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