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ESCON international is a manufacturer of best quality RINO Brand polyester whitening agent (White-R). We can

supply the product equivalent to any international standard or as per your sample standard.

Liquid Optical Brightener for Polyester Fabrics

RINO-WHITE-White R Liquid (Fluorescent brightening agent) RINO-WHITE-White R Liquid is fluorescence brightening agent for polyester fibers. It gives brilliant whitening effect

which has good fastness to sublimation, light and wet processing. It can be applied by high temperature exhaust or

pad-thermo- sol method and suitable for whitening effect on texturised polyester and polyester / cotton. It is

available as nonionic fluid dispersion greenish yellow in colour. The dispersion is miscible with water and can be

diluted to any desired concentration by adding water to it. It is recommended to adjust the ph of the bath between

4.5-5.5 as whitening effect may be reduce in extremely acidic or alkaline condition.

Method of application

Preparation of dispersion

The required amount of RINO-WHITE-White R Liquid is weighed out and stirred with 20 times of its weight of soft

water at room temperature. The required volumes are made up adding more soft water.

High-temperature method

The bath is prepared with 0.1-0.35 % RINO-WHITE-White R Liquid 1.0 g/l suitable dispersing agent pH 4.5-5.5 with

acetic acid Material to liquor ratio 1:10

The material is entered at about 50C and the temperature is slowly raised to 130C within 45-60 minutes. The

treatment is continued at this temperature for about 30-45 minutes. The material is then washed in cold water and

soaped at 60-70C for 10-15 minutes in 2 g/l. Neutral detergent.

Pad-Thermosol method

Padding

The fabric is padded through a pad-liquor containing 1-5 g/l RINO-WHITE-White R Liquid at room temperature

keeping 60-80% expression. The padded fabric is dried at approximately 120-140C fixations. The fixation

condition depends on fabric construction. Heavy or densely woven fabric requires higher fixation temperature or

longer fixation time than lighter fabric with open weave.

However, following fixation condition may be taken as general recommendation:

For normal polyester & polyester / cotton: 180-185C for 10-15 seconds.

For Texturised polyester: 170-180C

The thermo fixed material may be given rinsing and light soaping treatment with 2g/l neutral detergent at 60-

70C. For 10-15 minutes.

Note: The recommendation is based on laboratory experiments and to be considered as guide lines only. For bulk

production, it is necessary to carry out small scale trails to conform the local conditions.

The fastness properties were tested on polyester with 5 g/l RINO-WHITE-White R Liquid by pad- Thermosol

method. The figures give the information on Change in whiteness

Note: we are manufacturers of polyester and cotton whitening agents. We can supply low temperature as well high

temperature whitening agents for polyester fabrics. We can supply the product equivalent to any international

standard like basfs,cibas, ctxs,bayers or as per your sample standard,

Please visit our website : www.esconindia.com

Email ID : info@esconindia.com