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About Seed Beads


  Not all Seed Beads are Created Equal

Comparing size and shape consistency

Beads are one of the oldest objects known to mankind.
of ancient archeological sites reveal that beads were part  of the lives of our ancestors millennia ago. Throughout the ages, glass bead production, which originated in ancient Egypt, migrated to Venice and Murano. Then, about 300 years ago, bead production moved yet again to what is today the Czech Republic. Local craftsmen have gradually perfected the production process and since the beginning of the last century have achieved world-class quality glass beads. Today, this historical achievement is reflected in the unparalleled quality and durability of Czech Seed Beads.

Size and Shape Variation Test
In a recent study Seed Beads from various countries were subjected
to a systematic and rigorous quality testing. The first test
compared Seed Bead shape and uniformity across different manufacturers.
Samples of Seed Beads coming from 5 manufacturers
- one Czech, three Japanese, and one Chinese manufacturer
- were systematically studied, measured, and compared. Results
show that Czech Seed Beads possess the highest level of shape
and size consistency when compared to others. The following graph
demonstrates these findings:

Chart: Variation Coefficient

Note: The lower the values the higher shape consistency

Czech Seed Beads are easily recognizable by their round doughnut
shape.The symmetrical shape of the beads can be appreciated even more when beads are strung. Regularity and consistency of the shape set Czech Seed Beads apart not only from Chinese but also, contrary to popular belief, from Japanese seed beads.

Test Methodology

The test was performed on samples - 5 lots from each manufacturer - produced in both continuous melting tanks and separate ovens. Dimensions, including diameter, height and hole size of 100 randomly selected seed beads per each sample and manufacturer, were measured. 11/0 beads were used in the and Japanese samples and 10/0 beads in the Chinese samples. The standard deviation of measured dimensions was calculated for each sample of 100 beads. The variation coefficient is a ratio
between standard deviation and averages of measured dimensions.
Standard deviation reflects the average variation of beads in
the sample. Variation coefficient compares variations of different
sizes (e.g. 11/0 and 10/0 diameters or diameters vs. heights of beads).
Czech Seed Beads came out as the most uniform in all aspects
measured with a high statistical significance.

Shape and size consistency are very important parameters of Seed
Beads. They play an important role in the final look of any beading
project be it a jewelry item, embroidery or home décor. Czech Seed
Bead uniformity makes Czech Seed Beads a smart choice for any
creative project.

Czech Seed Beads, manufactured and distributed exclusively under Preciosa Traditional Czech Beads trademark, are the best choice, as clearly demonstrated by this rigorous study.


Strung Seed Beads


Assortment is King
How large is the seed bead assortment across different manufacturers ?

Size, Color and Finish Assortment Test

The other tests compared Seed Bead assortment across different manufacturers - from one Czech, three Japanese, and one Chinese manufacturer.
The results show that Czech Seed Beads come in the
largest assortment of sizes, colors, and finishes available in the

Test Methodology
Due to the very limited assortment of Chinese Seed Beads, only an
assortment of colors, sizes and finishes from one Czech and three
Japanese manufacturers were compared and tested.
Czech Seed Beads come in 20 sizes with both square and round
hole and in more than 1000 colors and finishes. This makes Czech
Seed Bead assortment the widest seed bead program in the world,
as demonstrated by the following table:

Seed Bead Size Comparison Chart

o = Round Hole, x = Square Hole

Seed Bead color/finish comparison chart (most common sizes)



Extensive color and size assortment is extremely important as
anyone in beading will readily attest. Finding the right size and color
for the beading project is half the success. Czech Seed Beads
come in a vast assortment, so beaders do not need to spend time
searching for the right bead and can instead concentrate on their
creative work.
Czech Seed Beads, manufactured and distributed exclusively under Preciosa trademark are the best choice, as clearly demonstrated by this rigorous study.




Keepsakes for Future Generations
How long does a seed bead last…?

Silver Lining Durability Test
The third test compared the silver lining quality of five seed bead manufacturers (one from the Czech Republic, three from Japan
and one from China). An independent, certified laboratory performed
four separate tests of silver lining durability across these manufacturers.
It found that silver lining might change color when exposed to  substances containing sulfuric acid or chlorine. It decays
when exposed to a large amount of these substances or if the silver
lining surface is mechanically scratched. However, the quality and
durability of the silver lining of Czech Seed Beads far exceeds that
of other manufacturers’, as summarized in the following table:

Czech Seed Beads’ outstanding quality, near perfect uniformity
and exceptional breadth of assortment make them a smart choice for any beading project. Czech Seed Beads, manufactured and distributed exclusively under Preciosa trademark, are the best choice, as clearly
demonstrated by this rigorous study. 




The durability of silver lining is an important parameter of seed bead
quality. It provides for a long-lasting brilliance of the beads, regardless
of the project they might be used in. Czech Seed Beads are in a category of their own. They represent a unique price value ratio. Production technology is constantly being refined, and several technological steps are carefully guarded secrets. Achieving superior quality is a complex and tricky task which involves many years  
of experience as well as a thorough understanding of the production process.


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