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Aged/Yellowed....Which BTW was what most of those items looked like when brand new.

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That's weird, that describes me.. Stinks getting old.


Troy

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For the new resto, I like white. The yellow just doesn't look right with everything else, just my .

Rick.

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for the guys doing premium restos and for the guys doing it themselves please ponder this.

Which do you prefer, The aged/yellowed look for the underhood plastics or the virgin white look?

I wish I was around these cars when they were new to have noticed this sort of thing.

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for the guys doing premium restos and for the guys doing it themselves please ponder this.

Which do you prefer, The aged/yellowed look for the underhood plastics or the virgin white look?

I wish I was around these cars when they were new to have noticed this sort of thing.

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I hate to open this can of worms but injected molded plastics such as washer bottles, wire straps, etc…. were no more “yellow” than newspapers were when they were first printed. Before starting ECS I worked as a systems engineer for factory automation and robotic systems. One of my accounts was a company called RUSTIQUE ENTERPRISES in St. Charles, MO. They manufacture building components that incorporate plastic injected molded parts in their product lines. They had huge containers of pea sized plastic pellets (of various colors) that were used to form their siding materials.
I took an original 1969 Firebird washer bottle to my business contact (actually a good friend) and asked him how hard it would be to re-manufacture them. He gave me quite a lesson on bakelite and celluloid plastic materials. He said the type of plastic that was used to make these components tended to yellow and crack over time. That type of aging would be normal for the type of celluloid material that was used to make these “cheap” items. I have replacement GM washer bottles from 1986 that have turned yellow over the years. If you look at the replacement bottles manufactured by Kent Q., he has to add tan pigment to his bottles to get the desired “aged” look. By doing so, it totally changes the “bubbled/aerated” look of the natural clear plastic material. Take a look at an original bottle. It has tiny bubbles trapped inconsistently throughout the plastic. The “yellowed” reproduction bottles are dense and without the “correct” trapped molded bubbles, due to the addition of tan coloring in the plastic. Check it out and you can see the differences for yourself. Original plastic components were not “yellow” when they were first formed and injected. Time was the resulting factor for that particular feature and look!

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I hate to open this can of worms but injected molded plastics such as washer bottles, wire straps, etc…. were no more “yellow” than newspapers were when they were first printed. Before starting ECS I worked as a systems engineer for factory automation and robotic systems. One of my accounts was a company called RUSTIQUE ENTERPRISES in St. Charles, MO. They manufacture building components that incorporate plastic injected molded parts in their product lines. They had huge containers of pea sized plastic pellets (of various colors) that were used to form their siding materials.
I took an original 1969 Firebird washer bottle to my business contact (actually a good friend) and asked him how hard it would be to re-manufacture them. He gave me quite a lesson on bakelite and celluloid plastic materials. He said the type of plastic that was used to make these components tended to yellow and crack over time. That type of aging would be normal for the type of celluloid material that was used to make these “cheap” items. I have replacement GM washer bottles from 1986 that have turned yellow over the years. If you look at the replacement bottles manufactured by Kent Q., he has to add tan pigment to his bottles to get the desired “aged” look. By doing so, it totally changes the “bubbled/aerated” look of the natural clear plastic material. Take a look at an original bottle. It has tiny bubbles trapped inconsistently throughout the plastic. The “yellowed” reproduction bottles are dense and without the “correct” trapped molded bubbles, due to the addition of tan coloring in the plastic. Check it out and you can see the differences for yourself. Original plastic components were not “yellow” when they were first formed and injected. Time was the resulting factor for that particular feature and look!

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New resto to me means "new" as delivered.
Rick.

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New resto to me means "new" as delivered.
Rick.

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That has been a big problem in the past with the way things have been translated concerning survivors. These cars may have exhibited flaws and imperfections but they were NEW flaws and imperfections. This holds true for any perishable item on a car. (Which includes just about every part.) From the day a vehicle is manufactured, it starts to oxidize and break down. I had to chuckle at a comment made by a forum member (in another thread) stating that this “stuff” is not a “science”. It most certainly is if you want to fully understand, interpret or discover the causes of why things happened after 40+ years of exposure. Restoring hundreds of pieces on a car will certainly mandate having to understand the “science“ behind the composite parts!

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I really enjoy these posts and your input as well Dave. Let me rephrase, new to me, means my wiper bottle will be as delivered, I think, lol. The rest will be over restored by most standards. That is the beauty of each resto, so many choices to be made and for some doing the over the top factory delivered parts, the change will be taking place to the metal before the resto rolls out the door.

Rick.

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One of your goals on your latest projects is to have the fewest repro parts possible, so which do you choose, the original which in the best case will still be yellowed somewhat, or the repro for the same look as when new?

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I am using the original bottle. I spent HOURS using every method I could to remove/eliminate any exterior staining that might have existed. Since it is a chemical composite breakdown within the plastic, it was impossible to get a cleaner looking finish. The plastic oxidized (yellowed) beneath the top surface! The washer bottle on my A Body is VERY nice but has some signs of discoloring. At least it has done so consistently and not in a splotchy fashion!

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One of your goals on your latest projects is to have the fewest repro parts possible...

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Do you guys REALLY want to start debating the various physical properties of plastics?

Ready when you are

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CELLULOSE BASED PLASTICS:

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