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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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(...) 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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(...) 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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(...) 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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(...) 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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(...) 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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| | Re: Variations in dark blue color.
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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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| | mega blocks vs lego
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someone mentioned Mega Blocks, I think it was me. here is a little film I found about Mega Blocks vs Lego. The ending is rather insightful. (URL) P (17 years ago, 14-Feb-08, to lugnet.color)
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(...) Thanks, that makes sense too. I wish I could replace these as this is a great display piece. It is so large I have it on the patio. John P (17 years ago, 14-Feb-08, to lugnet.color)
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(...) Scott: You pretty much nailed all the points I was thinking about making here. I've worked for a specialty thermoplastics compounder for 7 years now both as a product development/formulation engineer and as a computer aided engineering (...) (17 years ago, 14-Feb-08, to lugnet.color, FTX)
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| | Re: Variations in dark blue color.
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(...) Is there any consistency of fading by brick type, that could be explained by different molding batch? I have huge constructions of white and yellow bricks which were not consistent from the factory. The 1x4s and 2x2s were obviously differently (...) (17 years ago, 14-Feb-08, to lugnet.color)
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(...) ABS in and of itself will yellow. With white the yellowing is just more evident. Yellowing occurs in blue and red and all the other colors but is masked. It is analogous in paint to the fact that certain resins will yellow with age. Acrylic is (...) (17 years ago, 13-Feb-08, to lugnet.color)
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| | Re: Variations in dark blue color.
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(...) Thanks David, that makes sence John P (17 years ago, 13-Feb-08, to lugnet.color)
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| | Re: Variations in dark blue color.
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(...) I've been told this is common among white elements especially-- that they're more susceptible to light damage (or perhaps just that it's more noticeable in white). I was told (IIRC this was from master builders in Enfield) that even the (...) (17 years ago, 13-Feb-08, to lugnet.color)
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(...) Hi Rich I don't think that is the problem in that it is random all over the piece and there is no way these could have been damaged. There will be a row with 30 pure white and 20 yellowed and the new row is both also. This is from the bottom (...) (17 years ago, 13-Feb-08, to lugnet.color)
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<snip> > At some point in its (...) As someone who has had the dubious pleasure of maintaining a piece like that, I can tell you that it had gotten damaged. (Little curious fingers, pulling, pushing, etc.) When something like that receives damage, (...) (17 years ago, 13-Feb-08, to lugnet.color)
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| | Re: Variations in dark blue color.
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It is true that where LEGO used to receive color-molded pellets for (...) Scott, a question, why is it more difficult to control the color with clear plastic than it was to control the color in the older method of using colored plastic? Is it not (...) (17 years ago, 13-Feb-08, to lugnet.color)
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| | Re: Variations in dark blue color.
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(...) I'll echo Tommy's comments on colors. I've got four years experience working with injection molding machines, and about 8 years experience in manufacturing processes. It is true that where LEGO used to receive color-molded pellets for molding, (...) (17 years ago, 13-Feb-08, to lugnet.color)
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(...) I find very few, if no packing errors which always amazes me. Thousands of parts in a set and they are always perfect. When I build sets with my Grand daughter she will say this piece or that piece is missing. I tell her to look harder, she (...) (17 years ago, 13-Feb-08, to lugnet.color)
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(...) Ross, Thanks for this! I appreciate someone representing the truth of what's going on, and I admit my statement was over generalized. I would like to point out two things though. Mold making and parts making are being moved out of Denmark. (...) (17 years ago, 13-Feb-08, to lugnet.color, FTX)
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