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United States Department of Agriculture

Agricultural Research Service

Germination Test Methods
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1 - Main area
2 - Amaranth: D. Brenner, Curator
3 - Maize: M. Millard, Curator
4 - Oilseeds: L. Marek, Curator
5 - Ornamentals: M. Widrlechner, Curator
6 - Vegetables: K. Reitsma, Curator
7 - Seed Testing Papers
8 - General & Historic
Seed Testing Papers

 

 


Blotter Paper Types

Blue Blotter Paper

White Blotter Paper

Composition:

25% cotton, 75% wood pulp

75% cotton, 25% wood pulp
with wet strength resin

Basis 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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Last Modified: 3/8/2012
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