Indo White – AB – Z Liquid is a terasulpho type fluorescent whitening agent (FWA) for paper. It has a broad spectrum of application, good general properties and is largely unaffected by pH.

Properties :

Clear yellowish to yellowish brown liquid

Diaminostilbene Disulphonic Acid Derivative

Can be mixed with water in all properties

8.0 – 10.0

1.19 g/ml

Viscosity at 25^oC

Lower than 50m Pa.s (D=10S-4)

Anionic

23.5% +- 1.0%

Shade :

Indo White – AB – Z Liquid 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 – AB – Z Liquid in the wet end application:

Indo White – AB – Z Liquid can be added either batch wise in the pulpier or 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 – AB – Z Liquid has medium to high affinity for cellulose, the whitness depends on the treatment time and consistency of the furnish. The best effects is dosed at a points where the furnish is of high consistency. This is particularly important if soft water is being used.

0.05 – 1.0% g/l Indo White – AB – Z Liquid based on the weight of bone dry cellulose

Indo White – AB – Z Liquid at the size press application:

Indo White – AB – Z Liquid performs well with the conventional starch qualities used at the size press. It can be used together with CMC< 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. If the pH of the starch is below 5.0, we would recommend using Indo White – AS Liquidor indo white BSU liquid. It is preferable to add Indo White – AB – Z Liquid undiluted to the ready prepared size press liquor.

Indo White – AB – Z Liquid in coating:

FWAs of the Diaminostilbene Disulphonic acid derivative class do not have adequate affinity for coating pigments and synthetic lattices base on copolymers of acrylic acid ester or butadiene styrene. To achieve the best effect with FWAs co-binders are essential carriers

Suitable carriers for Indo White – AB – Z Liquid are in order of decreasing effectiveness PVA, CMC, starch and synthetic co-binders.

The beset effects of Indo White – AB – Z Liquid are obtained with the following amounts of co-binders, based on solid contents:

1.2 parts

1.2 parts

6.0 parts

0.4 parts

Indo White – AB – Z liquid can be added undiluted at almost any stage in the preparation of coating compounds.

0.2 – 1.0 parts based on the coating pigments

To obtain very high whiteness levels, we recommend our speciality FWA products Indo white AS liquid and Indo white BSU liquid. 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.