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SARAWHITE (CONC).

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SARAWHITE (CONC). | OBA with Neutral Tone

Product Information

Sarawhite (Conc). is a high-affinity optical brightener for cotton, cellulosic fibers, and their blends. It can also be applied to wool, silk, and nylon. Due to its 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 brightener 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.

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

Related Products

Product Name Short Description Description
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.

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