What is a cure for yellow models? - DA.C
 

Go Back   DA.C > Custom Creations > Custom Made Models

Reply
 
LinkBack Thread Tools Rate Thread
Old 08-04-2009, 01:16 PM   #1 (permalink)
Complete Wacko!
 
SuperKungFu's Avatar
 
Join Date: Nov 2008
Posts: 3,014
Default What is a cure for yellow models?

I have a very very old Skymarks 777 model that's starting to turn yellow (probably due to the sun or whatever). As much as I want to toss this sucker into the trash, it makes a nice decoration on top of the tv and it would look empty without it.

So my question is, is there a way to get rid of the yellow WITHOUT damaging the original paint? I was thinking about using bleach water but I'm afraid that would take off the passenger/cockpit windows and parts of the livery.

This is the model where it's yellow (note: it's hard to see because the flash was on) but this gives you the idea where I'm working with, i.e. the windows and the logo
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
SuperKungFu is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-04-2009, 08:49 PM   #2 (permalink)
Senior Collector
 
Join Date: Jun 2008
Location: Detroit
Age: 32
Posts: 344
Send a message via AIM to deadman3108
Default Re: What is a cure for yellow models?

I don't think their is a cure. I have many models that have started to turn yellow. Its all the original white plastic too. Usually painted models (even an actual white paint) don't turn yellow over time. I think twice when buying white colored models. I know that slims down your choices but its better to not waist your money. I had a box window fan with a white handle that use to sit in my window every morning for a rising sun. The side of the handle that faced the sun turned a deep yellow, while the other side was white. I think the UV rays speeds up the process.

Josh.
deadman3108 is offline   Reply With Quote
Old 08-05-2009, 12:18 AM   #3 (permalink)
Junior Collector
 
Join Date: Nov 2006
Location: in a building
Posts: 5,968
Default Re: What is a cure for yellow models?

Quote:
I think the UV rays speeds up the process.
Huh, its so supposed to do the exact opposite (at least on decals). SuperKungFu, try putting the mode in a window for a day or two and see if u see any changes. I do this all the time with old model decals and it takes the yellow right out of them.
__________________
LONG LIVE THE DC-10/A300/A310/MD-80/MD-11/IL96/IL86/TU154/TU134/AN2/LANDOR/ZAMBIA/N911NA/747100/RB211


IF YOU HAVE ANY HASEGAWA QUESTIONS PLEASE DIRECT THEM HERE
Bill-ay is offline   Reply With Quote
 
Old 08-05-2009, 01:49 AM   #4 (permalink)
Senior Collector
 
Join Date: Jun 2008
Location: Detroit
Age: 32
Posts: 344
Send a message via AIM to deadman3108
Default Re: What is a cure for yellow models?

For real?! Huh...
deadman3108 is offline   Reply With Quote
Old 08-05-2009, 02:30 AM   #5 (permalink)
Complete Wacko!
 
SuperKungFu's Avatar
 
Join Date: Nov 2008
Posts: 3,014
Default Re: What is a cure for yellow models?

really? So if sunlight wasn't the cause for them turning yellow in the first place, what did?
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
SuperKungFu is offline   Reply With Quote
Old 08-12-2009, 01:35 AM   #6 (permalink)
 
Join Date: Oct 2008
Posts: 317
Default Re: What is a cure for yellow models?

Yellowing is caused by a reaction between the white paint or ink and whatever is touching it... Paint white on bare plastic, it goes yellow... Some clear coats will turn white paint yellow. Some white paint will turn yellow because of it's own components degrading...

UV radiation damages the already unstable by-products of these reactions, reducing the obvious yellowing of white paint or decals... To a point. Extended UV exposure will then cause it's own style of carnage, causing a similar-appearing discoloration by a very different mechanism.
Team4R is offline   Reply With Quote
Old 08-12-2009, 08:24 AM   #7 (permalink)
Senior Collector
 
nanduneto's Avatar
 
Join Date: Mar 2007
Location: RS-Brazil
Posts: 156
Send a message via MSN to nanduneto
Default Re: What is a cure for yellow models?

Quote:
Originally Posted by Team4R View Post
Yellowing is caused by a reaction between the white paint or ink and whatever is touching it... Paint white on bare plastic, it goes yellow... Some clear coats will turn white paint yellow. Some white paint will turn yellow because of it's own components degrading...

UV radiation damages the already unstable by-products of these reactions, reducing the obvious yellowing of white paint or decals... To a point. Extended UV exposure will then cause it's own style of carnage, causing a similar-appearing discoloration by a very different mechanism.
That's right!!! Good words!!!
__________________
WMaquetes / WBJets
Visit:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
nanduneto is offline   Reply With Quote
Old 08-13-2009, 08:25 PM   #8 (permalink)
Junior Collector
 
Join Date: Nov 2006
Location: in a building
Posts: 5,968
Default Re: What is a cure for yellow models?

Quote:
Originally Posted by Team4R View Post
Yellowing is caused by a reaction between the white paint or ink and whatever is touching it... Paint white on bare plastic, it goes yellow... Some clear coats will turn white paint yellow. Some white paint will turn yellow because of it's own components degrading...

UV radiation damages the already unstable by-products of these reactions, reducing the obvious yellowing of white paint or decals... To a point. Extended UV exposure will then cause it's own style of carnage, causing a similar-appearing discoloration by a very different mechanism.
Since u the expert, why is it that when I put yellowed decals in a window they clear up?
__________________
LONG LIVE THE DC-10/A300/A310/MD-80/MD-11/IL96/IL86/TU154/TU134/AN2/LANDOR/ZAMBIA/N911NA/747100/RB211


IF YOU HAVE ANY HASEGAWA QUESTIONS PLEASE DIRECT THEM HERE
Bill-ay is offline   Reply With Quote
Old 08-14-2009, 08:43 AM   #9 (permalink)
 
Join Date: Oct 2008
Posts: 317
Default Re: What is a cure for yellow models?

Quote:
Originally Posted by Bill-ay View Post
Since u the expert, why is it that when I put yellowed decals in a window they clear up?
Because "UV radiation damages the already unstable by-products of these reactions, reducing the obvious yellowing of white paint or decals... To a point."

Did you even read what you quoted me on? Because that's EXACTLY what I was explaining...

Last edited by Team4R; 08-14-2009 at 08:45 AM.
Team4R is offline   Reply With Quote
Old 08-15-2009, 08:25 PM   #10 (permalink)
Crazy 1/400 collector
 
airbro's Avatar
 
Join Date: Nov 2008
Location: Sydney
Age: 24
Posts: 1,240
Default Re: What is a cure for yellow models?

Could you try some sort of polish?
__________________
Regards, Brad
airbro is offline   Reply With Quote
Old 08-17-2009, 11:19 AM   #11 (permalink)
Diecast Quality Inspector
 
Adrian's Avatar
 
Join Date: Oct 2007
Location: England
Posts: 3,637
Default Re: What is a cure for yellow models?

I think the problem is that plastic is an oil-based product and also model paints such as Humbrol are oil-based -oil being naturally brown makes the colour change. Today, paints are acrylic and the models are diecast, so neither are oil-based so today's models should not discolour.
__________________
Adrian


The missing B.707s still needed to be done in 1/400: Uganda Airlines, Luxair,

DC-8s still needed to be done in 1/400: UAT, Iberia ('80s scheme), Air Ceylon, Air Spain, Seaboard World (-63CF)

Aeroclassics Comets still missing- Dan Air (4 & 4C), United Arab Airlines/Misrair/Egyptair, Kuwait AW, Sudan AW, East African AW, Saudi Royal Flt.
Adrian is offline   Reply With Quote
Reply

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are On



All times are GMT -4. The time now is 09:40 PM.

Latest Threads
- by DUS23L
- by ams026
- by zachg
 

Models of the Week
 



Powered by vBulletin®
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.