Abstract: The procedure provides for the manufacture of crimped high-wet-modulus staple fibres by spinning from viscose to which have been added small quantities of derivatives of cyclohexanone or cyclopentanone and/or alkylated amino compounds of cyclohexane or cyclopentane.To improve the tenacity of the finished fibres, combinations of nitrogen-free and nitrogen-containing modifiers can be used. The viscose and/or spinning bath can also be treated with known stretching and spinning aids. In addition, the crimp-yielding additives can be combined with small amounts of zinc ions in the viscose, and the fibres can be allowed to relax in an alkaline bath after being spun.