The non-ammoniated version still has a small amount of ammonia in it.
The non-ammoniated version cures much slower.

----- Original Message -----
From: Rudy Sedlak <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, October 11, 1999 9:04 PM
Subject: Re: [TN] corrosion under temporary mask


> In a message dated 10/11/99 5:43:48 PM Pacific Daylight Time,
> [log in to unmask] writes:
>
> << So it's ammoia , interesting .
>  What's ammoia's function in temp solder mask ;
>  if there is nonammoniated version ?
>   >>
>
> Ammonia, in coatings, is usually present to neutralize the acidity of the
> coating, thus rendering it more water soluble.   And being volatile, it is
> neutralizer that you can cause to go away with heat, thus baking the
coating
> to a greater level of water resistance.
>
> I suspect strongly that a non-ammoniated version is theoretically
possible,
> whether it is commercially available, I cannot answer.
>
> Rudy Sedlak
>
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