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Formaldehyde, when applied with acid catalysis, is the most effective cellulose crosslinker available in that it produces the most crushproofing on a weight basis. However, formalization is accompanied by high strength loss in cotton.It has been postulated that the unfavorable crease recovery-strength relationship with formaldehyde is a function of the shortness of the acetal cross-link. It has also been postulated, naively, that longer cross-links could be derived from long chain dialdehydes, the crease recovery-strength relationship improving with increasing chain length.Work with the dialdehydes glyoxal (C 2 ). glutaraldehyde (C 5 ). and α-hydroxyadipaldehyde (C 6 ) yielded crease recovery-strength relationships similar, if not identical. to formaldehyde. This tinding is consistent with the known chemistry of the formaldehyde-cellulose reaction in that the acetal linkage controls the length of the cross-link.

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Offers a solution to a problem of liquid transfer identified in an earlier letter.