Bonar Yarns - Lead Testing Results
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HEAVY METALS STATEMENT
To determine the impact of our yarns in the environment, we recently carried out a test- program with a well-established German institute. The test program determined the content of heavy metals in our yarns, and to what extent heavy metals could end up in the environment during (acid) showers, searing heat and sunlight.
The table below lists the "concentrations" of heavy metals in our grass yarns, as tested at theinstitute for ecological building products, headed by Dr. Grunder.
|
Heavy metal
|
Unit
|
BONASOFT / BONAFIL
|
BONAGRASS MKII
|
Norm
|
|
Lead
|
[mg/kg]
|
6
|
< 3
|
85
|
|
Cadmium
|
[mg/kg]
|
< 0.3
|
< 0.3
|
0.8
|
|
Chrome total
|
[mg/kg]
|
7.2
|
5.7
|
100
|
|
Mercury
|
[mg/kg]
|
< 0.3
|
< 0.3
|
0.3
|
|
Zinc
|
[mg/kg]
|
15
|
11
|
140
|
|
Tin
|
[mg/kg]
|
< 10
|
< 10
|
---
|
|
Copper
|
[mg/kg]
|
119
|
109
|
---
|
In addition to the "concentrations" of heavy metals, it is important to determine to what extent heavy metals present in our yarn leach out during (acid) showers, searing heat and sunlight. The results are listed below against the new DIN 18035-7 norm.
|
Heavy metal
|
Unit
|
BONASOFT / BONAFIL
|
BONAGRASS MKII
|
DIN Norm
|
|
Lead
|
[mg/l]
|
< 0.005
|
< 0.005
|
< 0.04
|
|
Cadmium
|
[mg/l]
|
< 0.0005
|
< 0.0005
|
< 0.005
|
|
Chrome total
|
[mg/l]
|
< 0.005
|
< 0.005
|
< 0.05
|
|
Mercury
|
[mg/l]
|
< 0.0002
|
< 0.0002
|
< 0.001
|
|
Zinc
|
[mg/l]
|
0.19
|
0.25
|
< 3.0
|
|
Tin
|
[mg/l]
|
< 0.05
|
< 0.05
|
< 0.05
|
|
Copper
|
[mg/l]
|
0.01
|
0.02
|
---
|
Conclusion – Bonar grass yarns may be used anywhere without restriction, even in sensitive areas. Bonar grass yarns may also be recycled, dumped or burnt as normal waste.