Abstract: The invention relates to an ATR spectrometer, containing an optical probe having a sensor made of transparent material and a feed line and an exit line for light, wherein the sensor contains an optical polymer or a mixture of different optical polymers. The probe of the spectrometer according to the invention essentially has the advantages that it is inexpensive and extremely flexible, and that it can be matched to the concentration range of the solution to be examined, which makes it possible to fill the gaps in terms of measurable concentrations between conventional transmission spectroscopy and prior ATR spectroscopy.

Abstract: A dye mixture of azo dyes having fiber-reactive groups of the vinylsulfone series, comprising one or more navy-blue disazo dyes with the bivalent 1-amino-8-hydroxy-3,6-disulfo-naphthylene coupling component, one or more red-dyeing mono azo dyes, containing a phenylamino-chlorotriazinylamino-disulfo-naphthol-coupling component and one or more orange-dyeing monoazo dyestuffs with an amino-sulfonaphthol-coupling component, which dye mixtures are suitable for dyeing hydroxy- and/or carboxamido-groups containing materials, in particular fiber materials, such as cellulose fibers, for example cotton, wool and synthetic polyamide fibers.