Whatman™ Grade 3644 seed germination test papers are manufactured to an extremely high purity level which provides consistently reliable and reproducible results. This seed germination test paper is made from pure cellulose without any additives and do not contain any substances which could influence the growth of the seeds. The constant water absorption of the germination paper ensures the continuous provision of the required amount of water. The high level of contrast of the color of the seed germination paper makes evaluation easier, particularly for seeds with fine white rootlets or under artificial light. This makes seed germination evaluation work easier, improves the results and saves time for your laboratory. The dyes used in Whatman’s manufacturing process have been thoroughly investigated and have no influence on the growth of the seeds. Using the ISTA TP (Top of Paper) Test Method, the seed is placed on one or more layers of paper and then allowed to germinate in a Copenhagen tank, petri dish or incubator. ISTA Test Method for Paper: TP (Top of Paper). Type of Paper: Blotter, Color: Blue, Thickness: 1.4mm, Weight: 720(g/m2), Sheet Size: 140 x 200mm. 1000/Pack. Whatman™ #: 10342580.