Coir Hardboard for General Purposes -Specification

IS 15878: Scope and Key Specifications

• Scope (Clause 10.2.1):
  A lot conforms if requirements in Clauses 7, 8, and 11.4.1 to 11.4.12 are met.

• Dimensions (Clause 1.22):

  • Width: 1.52 m or 1.22 m
  • Length: 3.05 m, 2.44 m, 1.83 m, or 1.22 m
  • Tolerance: ±3 mm per meter on length and width
  • Note: Custom sizes may be agreed upon between manufacturer and purchaser.

• Rounding Off (No Clause):
  Final test or calculation values must be rounded per IS 2:1960 rules, retaining the same significant figures as specified.

• Reference Standards:
  Definitions per IS 707 apply.

Summary Table: Standard Dimensions and Tolerances

If you need formulas or detailed test procedures from Clauses 7, 8, or 11.4, please specify!

IS 15878 Key References: Coir Hardboard Specifications & Formulas

1. Coir Hardboard Properties (Table 1, Clause 9.2)

2. Key Formulas (Clause 2.2, G-2.2)

• Modulus of Rupture (MOR):

[ \text{MOR} = \frac{3WL}{2bt^2} ]

Where:

• (W) = failing load (N)

• (L) = span length (mm)

• (b) = specimen width (mm)

• (t) = specimen thickness (mm)

• Modulus of Elasticity (MOE):

[ \text{MOE} = \frac{P L^3}{4 b h^3 \Delta} ]

Where:

• (P) = load at proportional limit (N)
• (L) = span length (mm)
• (b) = specimen width (mm)
• (h) = specimen thickness (mm)

IS 15878 – Key Definitions and Specifications

1. Definitions (Clause 3.1)

• Definitions as per IS 707 apply.
• Additional terms specific to coir hardboards are defined in the standard.

2. Density Calculation (Clause 4.1)

Density (ρ) of a test specimen is calculated by:

[ \rho = \frac{m}{L \times b \times t} ]

Where:

• m = mass (g)
• L = length (mm)
• b = width (mm)
• t = mean thickness (mm)

3. Measurement Accuracy (Clause 4.1)

• Mass: ±0.1 g
• Length & Width: ±0.1 mm

4. Rounding Off (General)

• Follow IS 2:1960 for rounding numerical values.
• Retain significant figures as per specified values.

5. Key Specifications for Coir Hardboards (Table from Clause 9.2)

IS 15878: Classification & Key Specifications for Coir Hardboards

Moisture Content Test (Annex C)

• Dry specimen at 103 ± 2°C until mass is constant (±0.02% variation).
• Calculate moisture content by weight difference.

Density Reporting (Clause 4.2)

• Report density of two specimens and their average as test unit density.

Summary:

• Tempered Coir Hardboard has highest strength, lowest water absorption, and must

IS 15878: Materials and Manufacture — Key Specifications & Tables

Table 1: Requirements of Coir Hardboards (Clause 9.2)

IS 15878: Dimensions and Tolerances for Coir Hardboards

Key Dimensions (Clause 1.22 & 7.2)

• Width (m): 1.52, 1.22
• Length (m): 3.05, 2.44, 1.83, 1.22

Tolerances

• Length & Width tolerance: ±3 mm per meter (±3 mm/m)
• Measurement accuracy: ±1 mm for length and width (Annex B-1)

Test Specimen Dimensions (Clause 1.2)

• Length: ( 25 \times \text{thickness} + 50 \text{ mm} )
• Width: 75 mm

Measurement Guidelines (Annex B)

• Length and width measured with ±1 mm accuracy
• Thickness measured as per Clause 7.3 (details not provided in context)

Summary Table

If custom dimensions are needed, they must be agreed upon between manufacturer and purchaser.

flowchart LR
    A[Coir Hardboard] --> B[Width: 1.22 or 1.52 m]
    A --> C[Length: 1.22, 1.83, 2.44, 3.05 m]
    B & C --> D[Tolerance: ±3 mm/m]
    E[Test Specimen] --> F[Length = 25 × thickness + 50 mm]
    E --> G[Width = 75 mm]

This concise summary ensures compliance with IS 15878 dimensional requirements.

IS 15878: Physical Requirements for Coir Hardboards (Clause 7.3, 8 & Table 1)

IS 15878: Mechanical Requirements Summary

Key Mechanical Properties (from Table 1)

Test Specimen & Methods

• Tensile Strength Parallel to Surface (Clause 11.4.6):

  • 3 specimens cut from test unit
  • Test per Annex F
  • Min tensile strength as per Table 1

• Modulus of Rupture & Elasticity (Clause 11.4.7):

  • 4 rectangular specimens with square edges
  • Test per Annex G
  • Values per Table 1

• Flexibility Test (Clause 1.1 K-1.1):

  • Samples 400 mm × 75 mm from length and width, 150 mm from edges
  • Bend 180° around 250 mm diameter

IS 15878: Workability & Finish Key Points

Workability (Clause 9.1)

• Coir hardboards must not crack, split, or chip when drilled, sawed, or nailed perpendicular to the surface.

Mechanical Properties (Clause 2.2 & 11.4.6)

• Modulus of Rupture (MOR):

[ \text{MOR (MPa)} = \frac{3WL}{2bt^2} ]

Where:

• (W) = failing load (N)

• (L) = span length (mm)

• (b) = specimen width (mm)

• (t) = specimen thickness (mm)

• Modulus of Elasticity (MOE):

[ \text{MOE (N/mm}^2) = \frac{PL^3}{4bh^3 \Delta} ]

Where:

• (P) = load at proportional limit (N)

• (L) = span length (mm)

• (b) = specimen width (mm)

• (h) = specimen thickness (mm)

• (\Delta) = deflection at proportional limit (mm)

• Tensile Strength Parallel to Surface:
  Minimum values specified in Table 1 (refer IS 15878 Table 1 for exact values).

Physical Properties (Clause 12.0)

Summary Diagram of Mechanical Testing Setup

flowchart LR
    A[Specimen] --> B[Load Application]
    B --> C{Measure}
    C --> D[Failing Load (W)]
    C --> E[Load at Proportional Limit (P)]
    C --> F[Deflection (Δ)]
    D --> G[Calculate MOR]
    E & F --> H[Calculate MOE]

Note: Refer to IS 15878 for exact permissible limits in Table 1 and detailed

IS 15878 — Sampling and Criteria for Conformity

Key Clauses Summary:

• Clause 10.1: Scale of Sampling

  • Defines how many samples to select from a lot (refer to 10.1.3 for exact sample size based on lot size).

• Clause 10.2: Criteria for Conformity

  • 10.2.1: A lot is conforming if all samples meet requirements in Clauses 7, 8, and 11.4.1 to 11.4.12.
  • 10.2.2: If initial samples fail, select a second set randomly and test all. If any fail again, reject the entire lot.

Sampling Procedure:

(Note: Confirm exact numbers from Clause 10.1.3)

Decision Flow:

flowchart TD
    A[Select samples as per 10.1.3] --> B{Do all samples comply?}
    B -- Yes --> C[Lot Accepted]
    B -- No --> D[Select second set of samples]
    D --> E{Any sample fails?}
    E -- Yes --> F[Lot Rejected]
    E -- No --> C

Summary:

• Sampling is done per lot size.
• Two-stage testing: initial and confirmatory.
• Lot accepted only if all tested samples meet specified clauses.
• Ensures quality control and conformity before acceptance.

IS 15878: Key Test Methods & Specifications

1. Density Measurement

• Specimens: Two square specimens, 100 mm ± 1 mm each.
• Procedure:
  • Smoothen edges with sandpaper.
  • Measure density of each specimen.
  • Calculate average density:
    [ \text{Average Density} = \frac{\rho_1 + \rho_2}{2} ]
• Reporting: Report individual densities and average density of the test unit (Clause 4.2).

2. Moisture Content Test (Annex C)

• Specimen mass accuracy: ± 0.01 g.
• Drying: Oven at 103 ± 2℃ until constant mass (variation ≤ ±0.02% between two weighments at ≥1 hour interval).
• Moisture Content (%):
  [ \text{Moisture Content} = \frac{W_{wet} - W_{dry}}{W_{dry}} \times 100 ]

3. Modulus of Elasticity, Modulus of Rupture, Breaking Load (Annex G)

• Follow procedures in Annex G for these mechanical properties (Clauses 8, 11.4.7-11.4.9).
• Use three specimens, take the mid-value for results (Clause 1.2).

Summary Table:

flowchart TD
    A[Test Specimen Preparation] --> B[Density Measurement]
    B --> C[Calculate Average Density]
    A --> D[

IS 15878: Additional Requirements for ECO-Mark (Clause 12)

Key Points:

• ECO-Mark Basis:
  Based on Gazette Notification No. 170 (May 16, 1996) for Wood Substitutes as Environment Friendly Products.

• Manufacturer Obligations:

  • Submit documentary evidence (certificate/declaration) to BIS for ECO-Mark application.
  • Provide environmental consent clearance from State Pollution Control Board under:
    • Water (Prevention & Control of Pollution) Act, 1974
    • Air (Prevention & Control of Pollution) Act, 1981
    • Water (Prevention & Control of Pollution) Cess Act, 1977
    • Authorization under Environment (Protection) Act, 1986 (if applicable)

• Marking on Coir Hardboards:
  Each board shall be legibly marked near a corner with:

  • Manufacturer's name
  • Type of coir hardboard
  • Dimensions & thickness
  • Date of manufacture
  • ECO-Mark criteria met

• BIS Certification Marking:

  • ECO-Mark products must also carry the BIS Standard Mark (combination of ISI Mark + ECO logo).
  • Use of ECO-Mark is optional; manufacturers may opt for ISI Mark alone.

Summary Table of ECO-Mark Requirements

flowchart LR
  A[Manufacturer] --> B[Submit Documentary Evidence]
  B --> C[Obtain Environmental Clearances]
  C --> D[Manufacture Coir Hardboard]
  D --> E[Mark Product with Required Details]
  E --> F[Apply for BIS ECO-Mark Certification]
  F --> G{Approval?}
  G -->|Yes| H[Product Marked with ISI + ECO Mark]
  G -->|No| I[Revise & Resubmit]

This ensures compliance with environmental and quality standards for eco-friendly wood substitute products under IS 15878.

IS 15878 - Marking (Clause 14.1 & Table 14 BIS)

• The Standard Mark use is strictly governed by the Bureau of Indian Standards Act, 1986.
• Manufacturers must obtain a license from BIS to use the Standard Mark.
• Details of conditions and licensing procedures are available directly from the Bureau of Indian Standards.

Key Points on Marking:

• Marking must comply with BIS rules and licensing conditions.
• The marking typically includes:
  • BIS Standard Mark
  • License number
  • Manufacturer’s identification
  • Year of manufacture (if applicable)

Reference Table (14 BIS - Certification Marking)

(Exact table details are in the code, but typically include the layout and size of the mark on the product.)

Additional Notes:

• For thickness measurement (Clause 11.4.1), use Annex B.
• Rounding off test results should follow IS 2:1960 rules.

flowchart LR
    A[Manufacturer] --> B[Apply for BIS License]
    B --> C[License Granted]
    C --> D[Use of Standard Mark on Product]
    D --> E[Product Compliance Verified]

Summary: Marking ensures traceability and quality assurance per BIS licensing; consult BIS for exact marking format and license conditions.

IS 15878: Certification Mark Key Points

• Standard Mark Use: Governed by the Bureau of Indian Standards Act, 1986. License conditions for use are obtained from BIS (Clause 14.1).

• Marking on Coir Hardboards (Clause 14):

  • Manufacturer's name
  • Type of coir hardboard
  • Dimensions & thickness
  • Date of manufacture
  • ECO-Mark criteria (if applicable)
  • May bear the BIS Standard Mark

• Rounding Off Values: Follow IS 2:1960 for rounding test results to the same significant figures as specified values.

Summary Table: Marking Details on Coir Hardboard

Notes:

• ECO-Mark requires environmental clearance from State Pollution Control Board (Clause 12.1.2).
• Certification mark ensures product compliance and traceability.

flowchart LR
    A[Manufacturer] --> B[Coir Hardboard]
    B --> C{Marking on Board}
    C --> D[Name]
    C --> E[Type]
    C --> F[Dimension & Thickness]
    C --> G[Date of Manufacture]
    C --> H[ECO-Mark Criteria]
    C --> I[BIS Standard Mark (optional)]

IS 15878: List of Referenced Indian Standards

The standard references key IS codes essential for timber technology and related materials:

Key Points:

• IS 707 provides standardized definitions critical for timber-related terms ensuring uniform understanding.
• IS 9308 specifies quality and extraction methods for coir fibres used in composites or timber products.
• These referenced standards support IS 15878 by defining terminology and material specifications.

Certification Marking (Clause 14.1):

• Use of the BIS Standard Mark follows the Bureau of Indian Standards Act, 1986.
• Licensing conditions for manufacturers are regulated by BIS, ensuring compliance and quality.

Summary Diagram:

graph TD
    A[IS 15878] --> B[IS 707: Timber Glossary]
    A --> C[IS 9308: Coir Fibres]
    A --> D[BIS Certification Mark]
    D --> E[BIS Act 1986]
    D --> F[License Conditions]

This ensures clarity on terminology, materials, and certification under IS 15878.