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Some info on imitation amber beads made of Celluloid
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Posted by: Rosanna Post Reply
10/25/2017, 20:39:48

Floor Kaspers visited the Jablonec Museum of Glass in March of this year, and photographed a number of bead cards with imitation amber beads. I was really interested in what she found since some of the cards had been photographed in the 1980s by John Picard, and possibly were documentation of pre-1920s phenolic resin beads.

Floor found that some of the beads had deteriorated significantly in the last 30 years (see photo), and we documented her findings in a short article in the latest Bead Forum - the twice-yearly newsletter of the Society of Bead Researchers. Without being able to do any tests on the actual beads, I was still quite confident, just from the degraded appearance, that the beads were made of Celluloid - a nitrocellulose based plastic that dates from 1856.

After the article was published I was fortunate to be able to acquire a necklace (see photo) with Celluloid beads that are similar to the Jablonec beads and show the same deterioration. I tested the beads using a bead reamer inside the hole and detected the characteristic odor of camphor which was used as a plasticizer for Celluloid. So now I have 100% confidence in the identity of the Jablonec beads. You can also see that the metal bead caps (probably brass) are very deteriorated, and some are missing. When Celluloid degrades it gives off acid fumes that attack metal, paper, cardboard, etc. so storage of Celluloid items is challenging - if you have any Celluloid items they need to be kept dry, away from light, but with good air circulation so the acid fumes can escape.

The necklace appears to be a late 1800s to early 1900s design. The accompanying faceted amber glass beads are lovely - does anyone recognize the source? I purchased the necklace from a seller in France.

It's interesting that beads on the same necklace, and on the same bead card, show large variations in the amount of color change and fracture lines. I can only speculate that the beads may have been from different lots that had slightly different amounts of the chemical constituents and/or variations in the temperature reached during curing ( both very common occurrences in plastics manufacture).

So I have nothing new to report on phenolic beads from the African trade, but Floor and I hope to re-visit the Jablonec bead archives next year to continue the search for old plastic bead information.

SachseCard286-b.jpg (82.0 KB)  CelluloidGlassNecklace.jpg (51.2 KB)  


Modified by Rosanna at Thu, Oct 26, 2017, 11:43:02

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Re: Some info on imitation amber beads made of Celluloid
Re: Some info on imitation amber beads made of Celluloid -- Rosanna Post Reply Edit Forum Where am I?
Posted by: beadstore.com Post Reply
10/26/2017, 03:53:28

Hi Rosanna -- I don't really have anything to add, but I just wanted to say thanks for sharing such interesting research!

Abe



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Re: Some info on imitation amber beads made of Celluloid
Re: Some info on imitation amber beads made of Celluloid -- Rosanna Post Reply Edit Forum Where am I?
Posted by: sammitenn Post Reply
10/27/2017, 07:05:43

Ha ha!

What a surprise it was to see this necklace on here I thought I was seeing things! I sold it to you... I hope you were happy with it and I am so glad it made it across the pond intact. I love antique and vintage beads and I scour all the local brocantes and flea markets. I had no idea that it might have been that early. it was a pleasure to see it again.

sammi



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Thanks for your kind comments, Abe and Sammi
Re: Re: Some info on imitation amber beads made of Celluloid -- sammitenn Post Reply Edit Forum Where am I?
Posted by: Rosanna Post Reply
10/27/2017, 10:06:59

I continue to be fascinated with the history of plastic beads, especially if they were made to imitate other materials: ivory, amber, coral, tortoiseshell, etc. And I have a compulsion to figure out how to identify them without using laboratory equipment (that I no longer have access to, unfortunately!).



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Thank you for this interesting information. Here is another material
Re: Some info on imitation amber beads made of Celluloid -- Rosanna Post Reply Edit Forum Where am I?
Posted by: lindabd Post Reply
10/27/2017, 12:10:45

It looks like it might have been a paste that was molded and/or extruded somehow. Do you know what it is?

IMG_9162_copy.JPG (171.3 KB)  IMG_9156_copy.jpg (213.0 KB)  


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These remind me of beads made from recycled scrap plastic
Re: Thank you for this interesting information. Here is another material -- lindabd Post Reply Edit Forum Where am I?
Posted by: Rosanna Post Reply
10/27/2017, 13:51:00

I would have to test one to be sure - or you can do a hot needle, hot water, or reamer test yourself - but they look like beads that are made in Morocco (and probably other N. African countries) by melting scrap plastic, adding a colored plastic to change the color, mixing in a small metal pan over an open flame, then forming beads by hand. The hand-forming gives each bead an individual shape and is reminiscent of the irregular shapes found in natural amber beads that were traded to Africa over 100 years ago.

The hole is made by piecing with a hot poker. If you can see the "finishing" on the holes, you may have an important clue. After beads are made like this, there is a flashing around the hole that has to be ground off. Here is a picture of some beads of mine that were made this way.

I also have beads that look like yours, with a more granular surface, and they appear to have been made with a light colored core material, covered with a very stinky, plastic-smelling (styrene actually) coating that also adds to the irregular appearance (second photo).

My best estimate is that these are fairly new, hand- made "ethnic style" beads from Africa.

1_PSFauxAmber2.jpg (28.7 KB)  1_RFPlasticBeadsJun2016b.jpg (39.5 KB)  


Modified by Rosanna at Sat, Oct 28, 2017, 12:14:05

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Correct Dates
Re: Some info on imitation amber beads made of Celluloid -- Rosanna Post Reply Edit Forum Where am I?
Posted by: Beadman Post Reply
10/28/2017, 13:18:48

"1856" is much too early! This was the time of the first experiments in making cellulose/nitrate or nitro-cellulose artificial plastics. Dependable (but still dangerous) formulae were patented in 1869 (some sources say "1868")—and it was AFTER this time that commercial products would have been manufactured. However, due to the physical breakdown of these plastics (occurring because of ambient heat and exposure to ultraviolet), very few of these really early plastics remain. Some of mine self-destructed inside a protective box in storage.

https://www.britannica.com/technology/celluloid



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Correct - date of invention is not the same as date of commercial production
Re: Correct Dates -- Beadman Post Reply Edit Forum Where am I?
Posted by: Rosanna Post Reply
10/28/2017, 16:09:16

I tend to focus on when the invention took place. Thanks for adding this clarification.



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Re: Correct Date of Invention.
Re: Correct - date of invention is not the same as date of commercial production -- Rosanna Post Reply Edit Forum Where am I?
Posted by: Beadman Post Reply
10/28/2017, 20:04:27

Since most books provide "1869" or "1868" as the date of invention (some confusion resulting, perhaps, because there were parallel experiments in both the US and England), the date of "1856"—which pertains to earlier experiments, resulting in a different product—is too early.

My point is that when people read what you wrote and they look at their Celluloid beads, they will think, "my beads might be from 1856." However, it is much more likely that ANY Celluoid beads one may come across would have post-dated 1870. People tend to gravitate to "early" dates in time ranges, even when this is highly unlikely. You precipitated the same issue in your dating of cast phenolic plastics—unfortunately. My primary goal is always to provide a reasonable time for actual products that one may come across, as well as to present historical facts accurately.

Also, since Celluloid was essentially replaced the the safer cellulose-acetate, any such beads will be from even later in time, and will usually be misidentified as "Celluloid." I suppose this is an expected and forgivable error. of no great importance. either. JDA.



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I will have to disagree on several points
Re: Re: Correct Date of Invention. -- Beadman Post Reply Edit Forum Where am I?
Posted by: Rosanna Post Reply
10/28/2017, 22:30:08

On Celluloid (cellulose nitrate):
Celluloid was not universally replaced by cellulose acetate (CA), except in some applications that had significant problems with flammability, like movie film, and that was around 1950 (info from Wikipedia). In referring to my 1943 Handbook of Plastics by Simonds and Ellis, there are a good number of listings for the trade names, properties, etc for both materials. These two plastics have different properties. At this point I don't have documentation of any beads made from CA and so can't comment whether Celluloid beads stopped being produced in favor of CA, and when that may have occurred. I only have a few Celluloid beads and other articles, and don't think any of them are actually CA - but I'll be doing more testing on that point.

Celluloid is more dimensionally stable than CA, when exposed to moisture, since it absorbs less, so perhaps CA beads did not work very well - just don't know . I don't have any more technical clues about bead manufacture of either material at the moment.

I'm assuming that the Sachse cards are pre-1920, and I have a 1912 ad for celluloid beads, so the best I can do right now is assume Celluloid beads existed in the early 1900s. I believe Celluloid beads, buttons, etc were still being made right into the 40s, or even later, but I'm still researching this.

I apologize for any confusion about when the earliest beads may have been made from Celluloid. I once saw someone claiming their beads were made of Parkensine, a celluloid trade name that dates from 1862. At this point, I'd say the earliest date of Celluloid beads is unknown, but yes, likely after the commercialization of Parkensine.

On cast phenolic resins: These were being made commercially by the "teens". My contact in London says there were ads for Faturan, for example, in 1917. I hope to confirm this next year when I'm in London. There is documentation of significant cast phenolic resin production in England by 1919. Again, I have no firm info on when the first beads were made from phenolic resins. I'm still looking. I think pre-1920 phenolic beads exist, though it may be impossible, ultimately, to find confirmation of this.

I don't feel responsible if people take this to mean THEIR phenolic beads may be pre-1920, if that's what you're getting at.




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