OUR RANGE

Optical Brightener for Paper Industry

Improve paper whiteness and brightness with optical brighteners selected for the right stage of your process. DIA supplies disulpho, tetrasulpho and hexasulpho grades for wet end, size press and coating applications across tissue, writing paper printing paper, coated grades and paperboard.

OUR TABLE

Optical Brightener Grades for Paper Industry

2% Shade	4% Shade	Product	C.I./ CAS	Application	SDS	COA
Red	Red	Direct Red 39	– – –	CO/Pink/Ink
blue	blue	Direct Blue 267	– – –	——

2% Shade	4% Shade	Product	C.I./ CAS	Application	SDS	COA
Red	Red	Direct Red 39	– – –	CO/Pink/Ink
blue	blue	Direct Blue 267	– – –	——

2% Shade	4% Shade	Product	C.I./ CAS	Application	SDS	COA
Red	Red	Direct Red 39	– – –	CO/Pink/Ink
blue	blue	Direct Blue 267	– – –	——

Get in Touch

Why Choose DIA

Brightness You Can Control From Wet End to Coating

Paper brightness is affected by furnish chemistry dosage point retention and the brightener itself. DIA supplies grades for different stages of paper production so mills can select the right balance of fibre affinity solubility and whitening performance.

Grades for Every Dosing Point

Disulpho, tetrasulpho and hexasulpho optical brighteners for wet end, size press and coating applications.

Support for Different Furnishes

Grade selection support for virgin pulp recycled fibre mixed furnish and processes where residual brightener can affect the final dosage.

Consistent Strength

Controlled strength from lot to lot helps keep dosage stable and reduces unnecessary corrections during production.

Documentation & Compliance Support

TDS MSDS product specifications and relevant commercial documents are available for domestic and export requirements.

Our Market Reach

Serving Paper Mills in India and Overseas

DIA International supplies optical brightening agents to paper mills, paperboard manufacturers and chemical distributors in India and international markets. We support buyers with grade selection documentation packaging and coordination from trial quantity through repeat commercial supply.

20+ Countries Served

Active supply relationships across international markets.

Strong India Presence

Serving paper textile detergent and other process industries across major manufacturing regions.

Export Documentation Handled

TDS MSDS invoice packing list and applicable shipping documents coordinated with export orders.

How We Support You

From Paper Requirement to Reliable Supply

Share Your
Requirement

Tell us your paper grade furnish dosing point target brightness, current OBA and monthly consumption. These details help us identify the right starting grade.

Product & Technical Support

We recommend a grade based on wet end size press or coating application along with furnish conditions and required brightness. Samples can be provided for laboratory or mill trials.

Documentation & Commercial Coordination

Our team shares TDS MSDS specifications, pricing packaging and relevant commercial documents before bulk ordering.

Supply &
Follow-up

Once the grade is approved we coordinate regular supply and support repeat orders with consistent product specifications.

How We Support You

Frequently Asked Questions.

Q1. Which optical brightener is best for the paper industry?

The right OBA depends on where it is added and how much fibre affinity or solubility the process requires. Disulpho grades are commonly considered where higher affinity is needed while tetra and hexasulpho grades provide progressively higher solubility for size press and surface applications.

Q2. What is the difference between disulpho tetrasulpho and hexasulpho OBA?

The main difference is the degree of sulphonation which affects solubility and affinity for cellulose. Lower sulphonated grades generally have stronger fibre affinity while higher sulphonated grades offer greater solubility and are useful in surface applications.

Q3. Where is optical brightener added during paper manufacturing?

OBA can be added at the wet end through the size press or in coating formulations. The best dosing point depends on the paper grade furnish process conditions and required brightness.

Q4. How much optical brightener should be used in paper?

Dosage depends on furnish initial brightness, recycled fibre content application point and target whiteness. A controlled dose trial on the actual stock is the most reliable way to determine the economical working level.

Q5. Can I get a sample before placing a bulk order?

Yes. Share your paper grade furnish dosing point current brightener and target brightness. We can recommend a suitable grade and provide a sample for laboratory or mill evaluation.

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