SARAWHITE (CONC).

SARAWHITE (CONC). | OBA with Neutral Tone

Product Information

Sarawhite (Conc).is a high affinity optical brightener for cellulosic fibres and their blends. It can also be applied for wool, silk and nylon. Due to it's high affinity, Sarawhite (Conc).is recommended by exhaust application only. Sarawhite (Conc).is stable to peroxide as well as reductive bleach liquors hence, combined bleaching and optical brightening can be carried out.

Key Features & Benefits

Key Features	Benefits
Neutral white	Required tone easily adjusted
Concentrated form	Lower dosage required and economical
High affinity	Excellent exhaustion
Good stability to peroxide and reducing agent	Combined bleaching and optical brightening possible

General Characteristics

Physical appearance	Greenish yellow powder
Ionic nature	Anionic
pH of 1% solution	10 +/- 1
Miscibility	Miscible with water
Stability	Stable to dilute acids and dilute alkalies
Compatibility	Compatible with anionic and nonionic products

Application

Exhaust process

Cotton :

Dosage* : 0.1-0.15%
Bath pH : 6-12
Bath Temp. : 60-110 deg.C, 20-30 mins.

Viscose & Modal:

Dosage : 0.1-0.15%
Glauber's salt : 3-5 g/l
Bath Temp. : 60-80 deg.C, 20-30 mins.

Wool, Silk & Nylon

Dosage* : 0.1-0.15%
Sodium hydrosulphite : 2-4 g/l
Bath Temp. : 50 deg.C, 45-60 mins.

*Dosages recommended are based on the concentrated product's strength.

Dosages of diluted product to be calculated on the basis of solid content.

STABILITY & FASTNESS PROPERTIES

Peroxide bleach	Stable
Reduction bleach (hydrosulphite based)	Stable
Chlorite bleach	Unstable
Chlorine bleach	Unstable
Hard water, ppm (Ca)	142
pH	7-12

Fastness properties	Methods	Change in degree of whiteness
Light-fastness	ISO 105-B02	3 - 4
Wash fastness,60 deg.C	ISO 105-C06 C1	5
Wash fastness,90 deg.C	ISO 105-C06 E1	5
Dry heat fixation,180 deg.C	ISO 105-P01	5
Dry heat fixation,210 deg.C	ISO 105-P01	-
Perspiration, acidic	ISO 105-E04	5
Perspiration, alkaline	ISO 105-E04	5
Dry cleaning	---	5
Chlorine bleach	---	4
Chlorite bleach	---	1

Instructions For Dilution

Procedure to prepare 20% diluted product of 100% Sarawhite (Conc).

Take 55 parts of water (60 deg.C)
To this, add 25 parts of urea with constant stirring
Then slowly add 20 parts of Sarawhite (Conc). with constant stirring
Continue stirring till Sarawhite (Conc.) is completely dissolved
Maintain temperature (i.e. 60 deg.C) during stirring

Preservation: It is recommended to add 0.1% Bronopol (2-Bromo, 2-nitropropane, 1,3-diol) or Methyl Paraben (methyl para hydroxy benzoate) as an antimicrobial agent to avoid fungal / microbial growth.

Note:

pH of diluted solution should be between 9-10 and if not, adjust with caustic.

Un-dissolved particles if any can be filtered off

Diluted solution is stable for about 3 months.

It is advisable to utilize the diluted product within 2 months. Stir well before use.

Precautions

Storage : Store in cool, ventilated shed away from heat and direct sunlight. Storage temperature should not exceed 35 deg C.Close lids firmly to avoid contact with air and moisture.

Shelf Life : 9 months from the date of manufacturing, if stored under controlled conditions.

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The above information is given in good faith and is without warranty

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CAREWHITE-BBU 250%	OBA with Bluer tone	A low affinity optical brightening agent with bluer tone for Cellulosic fibres and their blends.
SARAWHITE-COL	OBA with Bluer tone	A high-affinity optical brightener with bluish tone for cellulosic fibres and their blends.
SARAWHITE-MST	OBA with Bluer tone	A high-affinity optical brightener in powder form imparting bluer tone on cellulosic fibre and its blends. It is suitable for exhaust application.