Ted,
I may have missed some parts of the discussion, my q is this: how is the 
wetting BEFORE coating?  We use Humiseal since many years, and we have also 
had dewetting issues. In some cases, the source of the problem was not the 
coating, but solder machine errors or contamination from plastic bags or 
improper component plating etc.
Inge

----- Original Message ----- 
From: "Ted Tontis" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, February 06, 2009 3:41 PM
Subject: Re: [TN] Coating material


> Joyce,
> Yes. They are the ones that suggested the possibility of foreign
> material on the boards, supporting our first assumption. They even took a
> sample and placed it in a vapor degreaser. The samples returned coated 
> just
> fine using the original 1B73AP. HumiSeal also suggested doing a Zestron 
> Flux
> and resin test, also came back negative.
>
> Thank you,
>
> Ted
>
> -----Original Message-----
> From: Joyce Koo [mailto:[log in to unmask]]
> Sent: Friday, February 06, 2009 8:28 AM
> To: [log in to unmask]; [log in to unmask]
> Subject: Re: [TN] Coating material
>
> Did you contact hermiseal application engineer?
> --------------------------
> Sent using BlackBerry
>
>
> ----- Original Message -----
> From: TechNet <[log in to unmask]>
> To: [log in to unmask] <[log in to unmask]>
> Sent: Fri Feb 06 09:26:17 2009
> Subject: Re: [TN] Coating material
>
> Grunde,
>
> The HumiSeal 1B73AP is supposed to reduce the occurrence of webbing, 
> that's
> why it was original chosen. Now that we switched over to the 1B73 we are
> seeing signs of it and trying to stay on top of it.  We reduced the 
> atomizer
> a little to try to keep it to a minimum, I am not sure how much that is
> going to help. I have seen worse on one of our other coaters spraying
> HumiSeal 905. We are currently using a PVA coater and spraying it on.
>
>
>
> Ted
>
>
>
>  _____
>
> From: [log in to unmask] [mailto:[log in to unmask]]
> Sent: Friday, February 06, 2009 2:01 AM
> To: TechNet E-Mail Forum; Ted Tontis
> Cc: [log in to unmask]
> Subject: Re: [TN] Coating material
>
>
>
>
> Hi
>
> Small air bubbles and cobwebbing are familiar issues with these materials.
> Do you use spray or filmcoating?
>
> Cheers, Grunde
>
>
>
>
>
> Is anyone currently using HumiSeal 1B73AP mixed with 521 carrier in a
> automated process? If so have you noticed any coating issues?
>
>
>
> Thank you,
>
>
>
> Ted Tontis CID
>
> Quality Engineer
>
> Borg Indak, Inc.
>
> 701 Enterprise Dr
> Delavan, WI 53115
>
> C 262-949-8887
>
> P 262-245-3060
>
> F 262-728-3788
>
> [log in to unmask]
>
> www.borgindak.com <http://www.borgindak.com/>
>
>
>
>
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