Whatman Quantitative Filter Papers. Of Course. Many times in the course of experiments the filtration step is crucial. Almost invariably the filter paper called upon in these cases is one of the eleven grades of Whatman quantitative filter papers. And this has been so for decades, in laboratories all over the world. Purity, uniformity, reliability in Whatman quantitative grades are confidently assumed by scientists everywhere and in every kind of analytical laboratory. As well it should be. No pains are spared to merit that confidence; compromises are unacceptable in producing the finest filter papers in the world. Use of only high purity alpha c e l l u l o s e s , rigorous quality controlled manufacturing, a unique (and proprietary) acid treat-
ment process, use of demineralized water, and many other specialized techniques ensure not only the highest quality but the highest achievable purity and consistency within grade and from grade to grade. W h a t m a n quantitative filter papers. The world's laboratory standard. Of course. Whatman Laboratory Products Inc. Whatman Paper Division 9 Bridewell Place, Clifton, New Jersey 07014 Tel: (201) 773-5800
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