NEW ENVIRONMENTALLY-FOCUSED OPTICAL BRIGHTENERSLeucophor® ACK liq

Highly concentrated urea-free disulpho liquid Free of solubilizing additives New generation OBA for effectiveness and performance

For additional technical service and /or laboratory assistance, contact your local Archroma representative or the Archroma Paper Department.

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LEUCOPHOR® ACK liq

Leucophor® ACK liq is a highly substantive, ultra-concentrated, disulphonated stilbene brightener which exhibits very good build up even at extremely low concentrations. It is especially suited for stock application in neutrally sized and calcium carbonate filled papers and for use in coating formulations which contain PVOH, CMC or casein as a secondary binder.

Leucophor® ACK liq is urea and glycol or solvent free and therefore contributes very much less to the overall nitrogen

and C.O.D. content of the backwaters and effluents.

Leucophor® ACK liq is readily dilutable with water in all proportions and exhibits very good stability to hard and soft water and alkaline conditions. It may be used continuously or batchwise as required and is compatible with most anionic and non ionic products. Resistance to interference from cationic products is better than with tetra or hexasulphonated products but may vary and should be determined in preliminary trials.

Leucophor® ACK liq is one of the most effective OBAs for use in wood containing grades such as improved newsprint. Whilst increases in brightness in these types of papers are modest in comparison to those produced with fully bleached chemical pulps, Leucophor® ACK liq has been found to perform well and hasthe advantage of being urea-free.

Appearance Clear yellow-orange liquid

Chemical Character Anionic stilbene derivative

Density (20°C) 1.13 kg/l

1 l = 1.13 kg

1 kg = 0.885 l

VISCOSITY20°C Approx. 200 mPa.s (Brookfield Programmable Viscometer, spindle 18, 60 r.p.m.)

0°C Approx. 1600 mPa.s (Brookfield Programmable Viscometer, spindle 18, 60 r.p.m.)

pH (as supplied) 9.0 - 10.0

Storage Stability Stable for up to 12 months when protected from light

Reduce your carbon footprint by switching to Leucophor® ACK liq• Switching to Leucophor® ACK liq would reduce the carbon dioxide effect by an estimated 42 tonne per year 1

• Typically a 40% reduction in OBA demand can be expected on switching to Leucophor ACK liq in a wet-end application 1 Source: TREMOVE data for carbon dioxide (CO2), nitrogen oxide (NOx) and particulate material (PM) emission factors per vehicle-kilometre

(calculation basis: Delivery of 1 000 tpa liquid disulpho of conventional strength over a distance of 1000 km)

Typical Properties

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