Economical works well in size press application reaching high

Whiteness levels suitable for Short fibers.

Indo White 2B – powder is a tetra sulpho type fluorescent whitening agent (FWA) for paper. It has a broad spectrum of application, good general properties and is largely unaffected by pH.

Properties :

Bright yellow, fine powder

100 g/l at 25^oC

8.0 -10.0

Density

0.88 + 0.10

Anionic

Max. 4.0%

22.5 + 5.0%

Shade :

Indo White 2B – powder gives a neutral shade in all applications. It only has a tendency to produce a greenish hue if too large amounts are used.

Indo White 2B – powder in the wet end application:

Indo White 2B – powder can be added either batch wise in the pulper of mixing chest or continuously at suitable dosing points in the stock preparation system. Care must be taken that the product is applied prior to either alum or cationic auxiliaries. Although Indo White 2B – powder has medium to high affinity for cellulose, the whiteness depends on the treatment time and consistency of the furnish. The furnish is of high consistency. This is particularly important if soft water is being used.

Average dosage – 0.1 – 1.5% Indo White 2B – powder (based on the weight of bone dry cellulose)

Indo White 2B – powder at the size press application:

Indo White 2B – powder performs well with the conventional starch qualities used at the size press. It can be used together with CMS< PVA and anionic and weakly cationic and weakly cationic synthetic sizing agents. Its effectiveness is influence by the ph of the base paper. The best effects are obtained if the pH of the base paper is above 5.

Average dosage : 0.5 – 10 g/l Indo White 2B – powder in size press liquor

Indo White 2B – powder in coating :

FWA's of the diaminostilbene disulphonic acid derivative class do ot have adequate affinity for coating pigments and synthetic lattices base on copolymers of acrylic acid ester or butadiene styrene. To achieve the best react with FWAs co-binders are essential as carriers. Suitable carriers for indo white 2B – powder are in order of decreasing effectiveness PVA, CMC, starch and synthetic co – binders. The best effects of indo white 2B – powder are obtained with the following amounts of co-binders, based on solids content.

1.2 parts

1.2 parts

Starch

Synthetic co-binders

0.4 parts

Indo white 2B – powder can be added diluted at almost any stage in the preparation of coating compounds.

0.5 – 1.5 parts based on the coating pigment.

The information and recommendations contained in this data sheet are to be the best of our knowledge correct, but no guarantee is given in this respect and no responsibility can be accepted for the results obtained.