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(...) John, Adding color dye to clear ABS is like taking a bowl of flour, and adding food coloring to it. You will find that as you mix the flour, some of the flour will wind up being tinted a little darker than other areas. It depends on your (...) (17 years ago, 15-Feb-08, to lugnet.color)
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| | Re: Variations in dark blue color.
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(...) Thanks for the explanitation. I still would think that if the supplier of the pellets starts off with a clear plastic and then adds color, it would be the same for Flextronics starting with a clear plastic and adding color to make the pellets. (...) (17 years ago, 15-Feb-08, to lugnet.color)
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(...) I believe that although the chemical coating prolongs the life of the model, it doesn't mean it will last indefinitely or will never yellow. It just means it takes longer to do so. I wish I remembered the stats, but I think it's something like (...) (17 years ago, 15-Feb-08, to lugnet.color)
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| | Re: Variations in dark blue color.
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(...) John: Not quite. Flextronics is a molder, while the suppliers they would buy precolored pellets from are compounders. The difference is all in the method and intensity of mixing. When a compounder colors a resin like ABS, they do start with a (...) (17 years ago, 16-Feb-08, to lugnet.color, FTX)
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| | Re: Variations in dark blue color.
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(...) Thanks, it is starting to clear things up for me. Would a solution be to make the bricks from one batch, or at least put bricks into the box from the same mixture? I am somewhat familiar with dye lot variations as I worked in the needlecraft (...) (17 years ago, 16-Feb-08, to lugnet.color, FTX)
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(...) Excellent lesson. This kind of material would have been welcome in this group a couple of years ago. Better late than never. Thanks for the info. Doug (17 years ago, 16-Feb-08, to lugnet.color, FTX)
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| | Re: Variations in dark blue color.
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(...) John: That might work if you were using precolored pellets...but honestly...if you were using precolor, you wouldn't see the variation. :-) With both concentrates and liquid color, there can easily be shot-to-shot variation if (...) (17 years ago, 16-Feb-08, to lugnet.color, FTX)
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| | Re: Variations in dark blue color.
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(...) It is useful, thanks Dave John P (17 years ago, 16-Feb-08, to lugnet.color, FTX)
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| | Re: Variations in dark blue color.
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(...) It is absolutely impossible to create a clear coating that will shield the uv light forever because of the fact that one has to incorporate some uv absorber in the coating that will absorb the energy. And transparent ones are not nearly as (...) (17 years ago, 21-Feb-08, to lugnet.color)
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| | Re: Variations in dark blue color.
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(...) Do you mean the 'swirl' effect seen on some metallized bricks? I actually like that effect. :) Steve (17 years ago, 21-Feb-08, to lugnet.color, FTX)
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