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Test Certificates

 

All our slates meet the British BS680 1971: Part 2 standard and also the America ASTM C120-90, C121-90 and C217-94 standard. Testing was conducted out by STATTS Laboratories and Stanger Testing Services Ltd. All our slates have also passed the new European BS EN 12326:2004 standard. This testing was carried out by IBIS Ltd and the summary of this testing is show below. 

As well as being continuously tested in China, our slates are also regularly selected for laboratory tests by ourselves and our customers in the UK. These tests are designed to assess if the slate products will withstand the most severe atmospheric circumstances.

Hard copies of all test certificates and reports are available on request.

You can also see some examples of Petrographic Examination and X-Ray Fluorescence Chemical Analysis here. 

 

BS EN12326:2004 TEST RESULT SUMMARY

 

 

 

 

Classique CSL-673

Emperor CSL-681

River Grey CSL-687

Dynasty CSL-682

East Moorland Green CSL-683

Blue Empress CSL-688

Origin

China

China

China

China

China

China

Strength (l'itudinal)

66 Mpa

69 Mpa

43 Mpa

44 Mpa

49 Mpa

50 Mpa

Strength (tra'vrse)

34 Mpa

64 Mpa

44 Mpa

50 Mpa

47 Mpa

49 Mpa

Colour

Weathering Grey

Blue Black

Grey

Blue Grey

Green

Blue

Sorting Level

Medium

Medium

Medium

Medium

Medium

Medium

Thickness

5.4 mm

4.7 mm

6.4 mm

7.3 mm

8.0 mm

7.1 mm

Dimension and Dimensional Variation

500x250 mm (+/-0.1/0.20%)

500x250 mm (+/-0.25/0.20%)

500x250 mm (+/-0.50/0.60%)

500x250 mm (+/-0.3/ 0.4%)

500x250 mm (+/-0.1/0,00%

500x250 mm (+/-0.30/0.20 mm)

Nominal Thickness and Variation

4-6 mm

4-6 mm

4-8 mm

6-11 mm

7-11 mm

6-10 mm

Carbonate Content

2.50%

0.20%

0.20%

0.30%

1.10%

0.10%

Durability / Water Absorption

A1: 0.44%

A1: 0.23%

A1: 0.26%

A1: 0.33%

A1: 0.22%

A1: 0.29%

Durability / Freeze Thaw Cycling

Not required

Not required

Not required

Not required

Not required

Not required

Durability / Thermal cycling

T1, No change

T1, No change

T1, No change

T1, No change

T1, No change

T1, No change

Comments

Economical, weathers rapidly to various colours perfect for refurbishment.

First grade, elegant blue black, durable slate for all applications

Unique colour, near match to SW England slate, widely used in Scotland.

Traditional blue grey colour with different degrees of light reflection.

Prestigious varigated green, near match to NW England slate

Attractive shade, near match to NW England Slate

Durability / Sulphur Dioxide Exposure

S1, No change

S1, No change

S1, No change

S1, No change

S1, No change

S1, No change