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1 - Germination Test Methods
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Blotter Paper Types
Blue Blotter Paper
White Blotter Paper
Composition:
25% cotton, 75% wood pulp
75% cotton, 25% wood pulp
with wet strength resinBasis Weight:
Listed: 25"x28" / 500 sheets = 250 lb.
= 502 g/m2
Listed: 1 lb. / 1389 ft2
= 104.6 g/m2
Thickness:
Listed: 31.5 mils
= 80 mm
Listed: 27.5 mils
= 0.70 mm
Burst Strength:
Listed: 45 psi (probably dry)
= 310.3 kPa
Listed: 200 inches H2O (wet)
= 49.8 kPa
Comparing the blue and white blotter papers when dry, the blue paper was much stronger than the white, but when comparing the blue and white blotter papers when wet, both burst strengths were very similar.
Our usage:
When seeds are not sensitive to a 'wet' environment.
When seeds require slightly dryer conditions to promote germination.
Costs:
lower
higher
Data source:
manufacturer
manufacturer
Manufacturer:
Anchor Paper
Ahlstrom Corporation
Disclaimer:
Mention of trade names or commercial products in this table is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the US Department of Agriculture.
Paper Towels used at NCRPIS
Composition:
100% unbleached sulfate wood pulp
Weight, Color, Texture:
Regular weight (38 lbs.), tan, creped
Burst strength:
Listed: 28 psi (probably dry)
= 193.1 kPa
Ash content:
0.7% maximum
pH of aqueous extract:
6.5 to 7.5
Data source:
manufacturer
Manufacturer:
Anchor Paper
Disclaimer:
Mention of trade names or commercial products in this table is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the US Department of Agriculture.
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