Germination test paper / Grade 193, Germination Test Paper / Grade 193This smooth yellow paper grade satisfies the requirements for the determination of dermination capability according to ISTA (International Seed Testing Association) and is ideal for ensuring optimal moisture content for the most diverse types of seeds and germination forms. The pH ranges between 6. 0 and 7. 5, it is wet strengthened and the special structure prevents fine seed roots from growing through the paper.