BIS Certification for Resin Treated Compressed Wood Laminates (Compregs) for General Purposes – IS 3513 (Part 3):1989

Introduction

Resin Treated Compressed Wood Laminates, commonly known as Compregs, are engineered wood-based materials manufactured using thin wood veneers and thermosetting synthetic resins. Through resin treatment, bonding, heat and pressure, the material obtains improved mechanical strength, dimensional stability, moisture resistance, machinability and resistance to certain corrosive agents and termite attack.

IS 3513 (Part 3):1989 specifies requirements for Resin Treated Compressed Wood Laminates (Compregs) for General Purposes. The standard covers requirements relating to raw materials, manufacture, grades, types, dimensions, physical properties and mechanical properties.

Compregs manufactured for general engineering, textile and jute industry applications and other covered uses may fall within this standard. BIS currently lists IS 3513 (Part 3):1989 in its product manuals, and the applicable regulatory framework places resin-treated compressed wood laminates under mandatory compliance.

About Resin Treated Compressed Wood Laminates

Compregs are manufactured from thin layers of wood veneer that are treated or combined with synthetic resin and subsequently bonded and densified under controlled heat and pressure.

Unlike ordinary solid wood, Compregs can provide improved:

Mechanical strength
Dimensional stability
Moisture resistance
Machinability
Resistance to termite attack
Resistance to certain corrosive agents
Durability

They can be manufactured in different forms such as:

Sheets
Boards
Rods
Moulded shapes
Machined components

The BIS description specifically identifies applications in general engineering, textile industry, jute industry and certain specialised installations.

What is IS 3513 (Part 3):1989?

IS 3513 (Part 3):1989 is the Indian Standard titled:

Specification for Resin Treated Compressed Wood Laminates (Compregs) – Part 3: For General Purposes

It is the first revision of the standard. BIS's Product Manual identifies it as the applicable standard for certification under Scheme-I of the BIS Conformity Assessment Regulations, 2018.

The standard covers Compregs intended for general purposes and specifically excludes the requirements for solid compressed wood.

Scope of the Standard

IS 3513 (Part 3):1989 covers resin treated compressed wood laminates intended for general purposes.

The standard does not cover solid compressed wood.

The material can be supplied in different forms and configurations depending on the manufacturer's product and intended application.

Grades of Compregs

The standard identifies two principal grades for general-purpose Compregs.

GH – General Purpose High Density

GH is a partially impregnated high-density material suitable for applications such as:

Textile and jute mill accessories
Tools
Engineering applications
General engineering applications

The grade includes:

Type II
Type III
Type V
Type VI

GM – General Purpose Medium Density

GM is a partially impregnated medium-density material intended for general purposes.

It includes:

Type II
Type III
Type V
Type VI

These grades and types are identified in the BIS material describing IS 3513 (Part 3):1989.

Types of Compregs

The classification of Compregs is also based on the orientation of the grain in the veneers.

The applicable types include:

Type II
Type III
Type V
Type VI

The exact grade and type should be selected according to the intended application and the requirements of the standard.

Applications of General Purpose Compregs

General-purpose Compregs are used in several engineering and industrial applications.

Typical applications include:

Textile Industry

Compregs can be used for manufacturing textile machinery components such as:

Picking sticks
Slay bases
Race boards
Swells
Picking levers
Stick wedges

Jute Industry

They can be used for accessories and components used in jute processing machinery.

General Engineering

Compregs can be machined into components where good dimensional stability, mechanical properties and machinability are required.

Automobile Industry

The BIS description also identifies applications such as silent gears and spinning chucks.

Raw Materials

The BIS Product Manual identifies the principal raw-material requirements for this product.

These include:

Timber

Timber requirements are specified with reference to Clause 5.1 of IS 3513 (Part 3).

Synthetic Resin

Synthetic resins are required to comply with IS 848 where applicable.

Varnishes

Varnishes are required according to the applicable requirements of the standard.

The Product Manual specifically identifies timber, synthetic resins and varnishes as relevant raw materials.

Manufacturing Process

The manufacturing process generally involves several controlled stages.

Selection of Timber

Suitable timber is selected according to the requirements of the standard.

Veneer Preparation

Thin veneers are prepared to the required dimensions and quality.

Resin Treatment

The veneers are impregnated or treated with suitable synthetic resin.

Assembly

The treated veneers are arranged according to the required grain orientation and product type.

Compression and Bonding

The veneers are subjected to controlled heat and pressure for bonding and densification.

Curing

Controlled curing ensures proper hardening of the thermosetting resin and bonding of the veneers.

Finishing

The finished Compreg may be trimmed, machined, sanded or otherwise finished according to the product requirements.

Inspection

The finished product is checked for dimensions, workmanship and applicable physical and mechanical properties.

Physical Properties

IS 3513 (Part 3):1989 specifies physical-property requirements to help determine the suitability of Compregs for different applications.

These can include:

Specific gravity
Moisture content
Volatile matter

The required values depend on the applicable grade and type.

Mechanical Properties

Mechanical performance is an important part of Compreg quality.

The standard addresses properties such as:

Tensile strength
Static bending strength
Compressive strength
Shear strength
Hardness
Impact strength

These properties help determine whether the material is suitable for its intended engineering application.

Dimensions and Tolerances

IS 3513 (Part 3):1989 also specifies dimensions and tolerances for different forms of Compregs.

Depending on the product form, dimensional checks can include:

Length
Width
Thickness
Thickness variation
Rod diameter
Rod length
Other applicable dimensions

The BIS Product Manual identifies dimensions and thickness as part of the product evaluation requirements.

Workmanship and Finish

Finished Compregs should meet the applicable requirements relating to workmanship and surface finish.

The Product Manual specifically identifies:

Thickness of veneers, dimensions and thickness, workmanship and finish

among the requirements that can be evaluated.

The finished material should be properly manufactured, bonded and finished without unacceptable defects that could affect its intended use.

BIS Certification for Compregs

BIS Certification provides a conformity assessment mechanism for manufacturers whose products are covered by the applicable Indian Standard and regulatory requirements.

For Compregs for General Purposes, IS 3513 (Part 3):1989 is included in the BIS product-manual system. BIS identifies certification under Scheme-I for this product.

The certification process may involve:

Factory assessment
Product testing
Raw-material verification
Manufacturing-process assessment
Quality-control verification
Documentation
Product grouping
BIS application
Test report evaluation
Licence grant

Applicable Quality Control Order

The BIS current Scheme-I listing places the three parts of the Compregs standards under the:

Resin Treated Compressed Wood Laminates (Quality Control) Order

For IS 3513 (Part 3):1989, BIS lists:

Resin Treated Compressed Wood Laminates (Quality Control) Order, 2023 – S.O. 3139(E), dated 14 July 2023

and

Resin Treated Compressed Wood Laminates (Quality Control) Order, 2024 – S.O. 1018(E), dated 29 February 2024.

Therefore, manufacturers should verify the current requirements of the applicable QCO before manufacturing or supplying products covered by the order.

Who Needs BIS Certification?

BIS certification requirements can apply to manufacturers producing Compregs covered by IS 3513 (Part 3):1989 under the applicable regulatory framework.

This can include:

Compreg manufacturers
Resin-treated wood laminate manufacturers
Engineered wood product manufacturers
Textile machinery component manufacturers
Jute machinery component manufacturers
General engineering component manufacturers
Industrial component manufacturers
Manufacturers supplying Compregs to Indian customers

Importers and other supply-chain businesses should separately verify the obligations applicable to their particular activity.

Eligibility Requirements

A manufacturer should have suitable facilities for:

Timber processing
Veneer preparation
Resin treatment
Veneer assembly
Hot pressing
Curing
Finishing
Machining
Dimensional inspection
Physical-property testing
Mechanical-property testing
Quality control
Product identification
Storage and packing

The exact facilities required depend on the manufacturer's product range and manufacturing process.

Documents Required

Documents commonly required for the certification process can include:

Company registration documents
Factory address proof
Factory layout
Manufacturing process flow
Machinery list
Product specifications
Product drawings
Grade details
Type details
Raw-material specifications
Timber details
Resin details
Varnish details
Raw-material test reports
Testing equipment list
Calibration certificates
Internal inspection records
Quality-control documents
Product photographs
Packaging details
Marking details
Trademark documents, where applicable
Authorized signatory documents

The final document list depends on the manufacturer's factory and product scope.

Product Sampling

The BIS Product Manual specifies the following sample requirements for IS 3513 (Part 3):1989:

Compregs – 1 full sheet
Face and core veneers – 2 sheets each
Resin – 5 litres
Varnish – 3 × 500 ml

The exact sampling procedure should be confirmed against the latest BIS instructions before submitting samples.

Testing Requirements

Testing and evaluation can cover various characteristics of the product.

Important areas include:

Raw Materials

Timber
Synthetic resin
Varnish
Veneers

Manufacturing

Curing
Bonding pressure
Thickness
Thickness variation

Dimensions

Board length
Board width
Board thickness
Rod length
Rod diameter
Applicable tolerances

Physical Properties

Specific gravity
Moisture content
Volatile matter

Mechanical Properties

Tensile strength
Static bending strength
Compressive strength
Shear strength
Hardness
Impact strength

Finished Product

Workmanship
Finish
Marking

The BIS Product Manual provides the testing framework and equipment requirements for certification.

BIS Laboratory Testing

BIS LIMS currently lists testing facilities for IS 3513 Part 3:1989.

One current BIS LIMS listing shows a testing charge of ₹14,000 excluding taxes for the listed scope. The same listing provides individual charges for various tests, including manufacturing parameters and dimensional characteristics.

The actual laboratory cost may vary depending on:

Laboratory
Product grade
Product type
Testing scope
Sample requirements
Additional tests
Applicable product variants

Therefore, the final testing cost should be confirmed for the exact product scope.

Factory Inspection

During the factory assessment, important areas can include:

Raw Material Control

Verification of timber, veneer, resin and varnish specifications.

Manufacturing Machinery

Inspection of veneer preparation, resin treatment, pressing, curing and finishing equipment.

Process Control

Review of resin treatment, bonding, compression and curing processes.

Testing Facilities

Verification of relevant measuring and testing equipment.

Calibration

Checking calibration certificates and records.

Quality Control

Review of incoming, in-process and finished-product inspection.

Traceability

Verification of batch and raw-material traceability.

Storage

Inspection of storage arrangements for raw materials and finished Compregs.

Packing and Marking

Verification of applicable product identification and packing requirements.

Common Reasons for Certification Delays

Manufacturers may face delays due to:

Incorrect product classification
Incorrect grade or type selection
Incomplete product specifications
Improper raw-material documentation
Timber not meeting requirements
Resin non-conformity
Incorrect veneer thickness
Improper resin impregnation
Incorrect pressing conditions
Improper curing
Thickness variation
Dimensional non-conformity
Mechanical test failure
Inadequate testing facilities
Missing calibration records
Incorrect marking
Incomplete quality-control records
Factory not ready for inspection

Proper preparation before submitting the application can reduce avoidable delays.

BIS Certification Cost

The overall cost depends on:

BIS application charges
Laboratory testing
Product grade
Product type
Number of product variants
Sample transportation
Factory inspection
Testing equipment
Retesting, if required
Documentation
Consultancy charges

Current BIS LIMS information lists a ₹14,000 excluding taxes testing charge for one listed laboratory scope for IS 3513 Part 3:1989.

The final cost should be calculated after reviewing the manufacturer's exact product range.

Certification Timeline

The time required depends on:

Factory readiness
Documentation
Product grouping
Sample preparation
Laboratory availability
Testing
BIS application scrutiny
Factory inspection
Test report evaluation
Closure of observations

A product-specific timeline can be estimated after reviewing the manufacturer's factory and product details.

Benefits of BIS Certification

Compliance with Applicable Requirements

Helps manufacturers meet the requirements of the applicable Indian regulatory framework.

Consistent Product Quality

The certification process encourages systematic production and quality control.

Customer Confidence

BIS certification provides confidence that the product has been assessed against the applicable standard.

Market Acceptance

Certification supports supply where compliance with the applicable QCO is required.

Better Manufacturing Control

Testing and inspection help manufacturers identify and control production variations.

Improved Traceability

Proper records help maintain traceability of raw materials and finished products.

Business Credibility

BIS certification can strengthen the manufacturer's credibility among industrial customers.

Why Choose Qualitance India?

Qualitance India provides BIS certification consultancy for manufacturers dealing with products covered by Indian Standards.

For Resin Treated Compressed Wood Laminates (Compregs) for General Purposes as per IS 3513 (Part 3):1989, assistance can include:

Product applicability assessment
Standard requirement review
Grade and type assessment
Product grouping guidance
Documentation support
Testing laboratory coordination
Sample preparation guidance
BIS application assistance
Factory inspection preparation
Quality-control documentation
Test report coordination
Observation closure assistance
BIS licence support

Qualitance India

Phone: +91-9310-615-170
Email: info@qualitanceindia.com
Website: https://qualitanceindia.com/

BIS Certification Process

Product Identification
↓
IS 3513 (Part 3):1989 Requirement Review
↓
Grade & Type Selection
↓
Factory Assessment
↓
Documentation Preparation
↓
Sample Preparation
↓
Laboratory Testing
↓
BIS Application
↓
BIS Scrutiny
↓
Factory Inspection
↓
Test Report Evaluation
↓
Observation Closure
↓
BIS Licence
↓
Standard Mark Compliance

Frequently Asked Questions

1. What is IS 3513 Part 3:1989?

IS 3513 Part 3:1989 is the Indian Standard for Resin Treated Compressed Wood Laminates (Compregs) for General Purposes.

2. What are Compregs?

Compregs are resin-treated compressed wood laminates made from thin wood veneers combined with thermosetting synthetic resins and bonded/densified under heat and pressure.

3. What are general-purpose Compregs used for?

They are used in general engineering, textile industry, jute industry and other applications where the properties of Compregs are suitable.

4. Which grades are covered?

The standard identifies GH General Purpose High Density and GM General Purpose Medium Density grades.

5. Which types are covered?

The grades include Type II, Type III, Type V and Type VI.

6. Is BIS certification applicable to Compregs?

Yes. IS 3513 Part 3:1989 is included in the BIS product certification framework, and the current BIS regulatory listing places it under the Resin Treated Compressed Wood Laminates Quality Control Order.

7. Which Quality Control Order applies?

BIS lists the Resin Treated Compressed Wood Laminates (Quality Control) Order, 2023 and the 2024 Order for this product category.

8. What raw materials are required?

Important raw materials include timber, synthetic resin and varnish.

9. What resin is used in Compregs?

Compregs are generally made using thermosetting resins such as phenol or cresol formaldehyde resin.

10. What tests are performed?

Testing can include physical properties, mechanical properties, dimensions, thickness, workmanship, finish and manufacturing-related requirements.

11. Are mechanical properties tested?

Yes. Tensile, static bending, compressive, shear, hardness and impact properties are among the characteristics identified for Compregs.

12. Are dimensions checked?

Yes. Dimensions and tolerances for sheets/boards and rods are covered by the standard and Product Manual.

13. What sample is required for Compregs?

The Product Manual specifies one full sheet of Compreg, along with specified quantities of face/core veneers, resin and varnish.

14. What is the current laboratory testing cost?

One current BIS LIMS listing shows ₹14,000 excluding taxes for the listed testing scope. Actual charges depend on the laboratory and testing requirements.

15. Is factory inspection required?

Factory assessment forms part of the applicable certification process under Scheme-I.

16. Can Compregs be manufactured as rods?

Yes. Compregs can be manufactured in different forms including sheets, rods and moulded shapes.

17. Can Compregs be machined?

Yes. One of the advantages of Compregs is their suitability for machining.

18. Are Compregs the same as solid compressed wood?

No. IS 3513 Part 3 specifically states that the standard does not cover solid compressed wood.

19. Who can apply for certification?

Manufacturers producing Compregs covered by IS 3513 Part 3 and the applicable regulatory requirements can seek certification.

20. Can Qualitance India help with BIS certification?

Yes. Qualitance India can assist with product assessment, documentation, testing coordination, BIS application and factory inspection preparation.

Website Image Text

RESIN TREATED COMPRESSED WOOD LAMINATES

COMPREGS – FOR GENERAL PURPOSES

IS 3513 (PART 3):1989

BIS CERTIFICATION CONSULTANCY

Qualitance India
+91-9310-615-170
info@qualitanceindia.com
qualitanceindia.com

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Need BIS Certification for Compregs?

If you manufacture Resin Treated Compressed Wood Laminates (Compregs) for General Purposes and need assistance with IS 3513 (Part 3):1989, Qualitance India can help with product assessment, documentation, laboratory testing coordination, BIS application and factory inspection preparation.

Qualitance India
Phone: +91-9310-615-170
Email: info@qualitanceindia.com
Website: https://qualitanceindia.com/

Contact our team to discuss your BIS certification requirement for Compregs.

Conclusion

Resin Treated Compressed Wood Laminates, commonly known as Compregs, are engineered wood materials designed to provide improved mechanical performance, dimensional stability, machinability, moisture resistance and durability compared with ordinary wood.

IS 3513 (Part 3):1989 covers Compregs intended for general purposes, including the GH and GM grades and their applicable types. The standard addresses raw materials, manufacturing, dimensions, physical properties, mechanical properties, workmanship and finish.

BIS currently includes this product within the Resin Treated Compressed Wood Laminates Quality Control Order framework, making compliance important for manufacturers covered by the applicable requirements.

For manufacturers planning BIS certification, proper preparation of raw-material controls, manufacturing processes, testing facilities, product specifications, documentation and factory quality-control systems is essential.

Qualitance India can assist manufacturers throughout the BIS certification process for Resin Treated Compressed Wood Laminates (Compregs) – IS 3513 (Part 3):1989.