VINABRITE BKF
Optical brightener for cellulose and polyamide fibers, wool and silk
PROPERTIES
Chemical character
Appearance
Ionic character
pH-value of a 10 % solution
Apparent density
Stabilities
Stilbene derivative
Greenish powder
Anionic
9.0 ± 1.0
Approx. 0.8 g/ml
Hypochlorite bleach Instable
Chlorite bleach Instable
Peroxide bleach very good
Hydrosulphite bleach good Acid stability Instable
Alkali stability is very good
GENERAL DESCRIPTION
VINABRITE BKF is a highly affinitive brightener which allows for very brilliant,
blue-tinged white shades through the addition of dyestuff. The dyestuff is not
destroyed by peroxide. Shade deviations may occur in reductive bleaching
processes depending on the recipes with reduction agents.
DILUTION
VINABRITE BKF is dissolved by pouring the 30 to 40 fold amount of hot water (> 80°C) over it. Diluted solutions or stock solutions must be protected from direct light.
APPLICATION
VINABRITE BKF brightens cellulose fibers, polyamide, wool and silk. Cellulose,
wool and silk are preferably brightened in discontinuous long liquor procedures
because of the affinity behavior of VINABRITE BKF. For polyamide fibers it is
also possible to use continuous procedures such as pad-steam or pad-roll.
RECIPE PROPOSAL
We cannot recommend precisely a certain application amount since it depends
on the foaming substance in the liquor, on turbulence and on air inlet. Normally
the following amounts are recommended.
0.2 – 1.0% VINABRITE BKF
The information given in this leaflet is based not only on work in our laboratories
but also on the reported results of other workers in this field. It is offered without
guarantee and no patent liability is assumed.