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2 Polish Journal of Chemical Technology

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The influence of stilbene whitening agents on paper resistance to ageing

Drzewińska E., Wysocka-Robak A.

Polish Journal of Chemical Technology

2006

Vol. 8, nr 4

91-94

The authors examined the influence of stilbene optic whitening agents on paper resistance to ageing, which shows itself in reversion of whiteness and deterioration in strength properties. The white colour and strength properties of papers whitened optically with stilbene derivatives are reduced rapidly under daylight and/or heat. Therefore, it is not advisable to use them in so-called durable papers intended for documentary, cultural and historical purposes, where paper resistance to ageing should be unlimited.

The photostability of the azo dye mixtures on synthetic fibres

Podsiadły R., Sokołowska J.

Polish Journal of Chemical Technology

2003

Vol. 5, nr 4

8-10

The photochemical behaviour of some azobenzene dyes and related heterocyclic analogues used in the mixture on polyester and polyamide fibre in the Xenotest (visible) light was investigated. On the basis of the reflectance spectra the general conclusions concerning the photochemical interaction was discussed. The phenomenon "catalytic fading" for some cases was found. In some others the colorants exhibited the filter action for each other.