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Re: [CBQ] Rapido SW1200

To: CBQ@groups.io
Subject: Re: [CBQ] Rapido SW1200
From: "Leo Phillipp via groups.io" <qutlx1=aol.com@groups.io>
Date: Tue, 7 Sep 2021 20:57:40 -0500
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Ed,

I would offer that given your occupation in the paint industry that instead of 
2 cents your comments are worth way more than that !

Leo

> On Sep 7, 2021, at 8:49 PM, Ed Pavlovic <cbq168a@comcast.net> wrote:
> 
> The funny thing is that even if someone did find a sample of the prototype 
> applied to an object that had not been exposed to light, it would probably be 
> more yellow than when originally applied.  Alkyd resins such as the paints 
> used back then will yellow in the absence of UV light to some degree.  The 
> resins can be formulated differently to reduce this but you will make the 
> dried film more brittle and prone to chip and crack, so paint manufacturers 
> had to balance hardness an elasticity when formulating those paints back them 
> just like they still do with modern coatings.
> 
> It’s not like you could call DuPont and order a batch of that paint these 
> days, lead based pigments and resins used back then aren’t available so any 
> formulas that may still exist are kind of useless 70-80 years after the fact 
> without the raw materials.
> 
> Just my $0.02 opinion.
> 
> Ed Pavlovic
> 
> 
> 
> 
> 



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