Subject:
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How to tell Cellulose Acetate from ABS
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Newsgroups:
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lugnet.general
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Date:
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Fri, 23 Jul 1999 14:40:34 GMT
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Viewed:
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1160 times
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Chris Dee sent me a personal Email about Cellulose Acetate. So here is
a reprint of my reply. Gary Istok
___________________________
I was looking at some Cellulose Acetate windows yesterday, and I have to
say that some of the pieces (especially white) are a little difficult to
tell from ABS Lego.
The red pieces are probably the easiest to tell apart. They are a
lighter color that has sort of an orange tint to it. White bricks are
more difficult to tell apart, probably due to the lack of any color.
However the white bricks have a sort of "milky" hue. Yellow and blue
Cellulose Acetate bricks are scarcer to find. The Cellulose Acetate
yellow is lighter and more "lemon yellow" than the current yellow. The
blue is hard to distinquish. And grey or black Cellulose Acetate pieces
are very rare.
The easiest way to tell all Cellulose Acetate Lego from ABS is warping.
If you take a brick and turn it upside down, look at the 2 longest
straight edges of the brick bottom. If there is a slight curve, you are
almost guaranteed to have Cellulose Acetate. If 2 equal sized bricks
are put together, and there is any gap at all somewhere around the edges
where they connect, you have Cellulose Acetate. If the windows or doors
have any warping at all (very common in Cellulose Acetate windows and
sloped bricks) then you have Cellulose Acetate.
Also the flat surfaces (including the flat area around the studs on top)
can also have some roughness (not wear) and uneven surfaces.
ABS plastic tends to keep its shape, even after 35 years. So if your
Lego brick has a darker color and no warpage, then it must be ABS.
One thing I have noticed is that those large white plates (2x8, 4x8,
6x8) with the square holed bottom are almost always Cellulose Acetate.
And yet they don't warp much. The square holed bottom must help
preserve the shape of the plates.
Gary Istok
.
> At 04:27 AM 7/23/99 PDT, you wrote:
> Hi Gary
>
> Seeing your recent discussions on LUGNET, is there a surefire way to
> recognise Cellulose Acetate parts?
>
> I have some bricks I have set aside from mixed parts purchases 'cos • they
> don't look right. Some are clearly poor quality imitations, but some • have
> the italicised LEGO logo on the studs, but the characters are not in • the
> same proportions as the current bricks, they are slightly less tall. • The
> text is definitely italicised and not squat and upright like some fakes • I
> have seen. Any ideas about these - I could drop an example in the post • if
> seeing them would help.
>
> Chris Dee
>
>
> ______________________________________________________
> Get Your Private, Free Email at http://www.hotmail.com
>
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Message has 1 Reply:
 | | Re: How to tell Cellulose Acetate from ABS
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| Ok, I can understand most of that, though in some respect I don't agree with the blue being harder to seperate, I've got some very old blue slopes, and I can tell just by looking in the bin which ones are and aren't. They are lighter, not as much a (...) (25 years ago, 23-Jul-99, to lugnet.general)
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