Linoleum Sheets And Tiles

IS 653: Scope - Key Specifications & Tables

1. Tolerance on Dimensions (Clause 5.3, Table 1)

Water Absorption Limits:

2. Sampling & Conformity Criteria (Clause 10.1.2, Table 2)

IS 653 Key References: Formulas, Tables & Specifications

1. Tolerances on Dimensions (Clause 5.3, Table 1)

2. Criteria for Conformity

a) Sheets (Clause 10.1.2, Table 2)

b) Tiles (Clause 10.2, Table 3)

IS 653: Linoleum Sheets and Tiles - Key Material Specifications

1. Paint Composition for Hessian Backing (Clause 3.3)

2. Dimensional Tolerances (Table 1, Clause 5.3)

3. Physical Properties (Table 1, Clause 5.3 & Amendments)

4. Seasoning (Plain Linoleum)

• No color or grain difference between edges and center 24h after cutting.

Summary:

• Dimensional control is critical: ±3 mm width, ±0.15 mm thickness.
• Water absorption limits vary with thickness, max 10% for thinnest sheets.
• Paint on backing follows strict composition for durability.
• Flexibility and indentation resistance ensure performance.

flowchart LR
    A[Raw Materials] --> B[Paint Composition]
    B --> C[Hessian Backing]
    C --> D[Linoleum Sheets/Tiles]
    D --> E[Dimensional Tolerances]
    D --> F[Physical Properties]
    E --> G{Width, Thickness, Squareness}
    F --> H{Water

IS 653: Types of Linoleum - Key Specifications & Tables

1. Composition (Clause 3.1)

Linoleum's wearing surface is made from:

• Oxidized/polymerized linseed oil (IS 75:1973) or other drying oils
• Rosin or resin (or both)
• Cork flour and/or wood flour
• Mineral fillers
• Coloring materials/pigments

2. Special Types (Clause 4.2)

• Moire, Jaspe, Marble Linoleum: Multi-colored composition extending from surface to backing, forming variegated patterns.

3. Dimensions & Tolerances (Clause 5.3, Table 1)

4. Water Absorption Limits (by Thickness)

Summary Diagram: Linoleum Composition & Testing

flowchart TD

IS 653 - Dimensions and Tolerances Summary

Key Tolerances (from Table 1, Clause 5.3)

Water Absorption Limits by Thickness (mm)

Notes:

• Tolerances on tile sizes apply at the time of cutting.
• Squareness measured using a metal jig.
• Residual indentation is tested after applying a standard load.
• Water absorption and ageing requirements ensure durability.

flowchart LR
    A[Linoleum Sheets/Tiles] --> B[Width ±3mm]
    A --> C[Tile Size ±0

Backing Material Specifications (IS 653)

• Backing Material: Must be hessian conforming to Type II of IS 2818 (Part 2): 1971 (Clause 3.2).
• Surface: Mixed and pressed to a smooth surface, securely bonded to the wearing surface (Clause 3.2 Note).
• Painting of Hessian Backing:
  • Generally, painting is not allowed unless specified (Clause 6.2).
  • If painted, paint composition must be:

(Clause 3.3)

• Physical requirements and tolerances for linoleum sheets and backing are detailed in Table 1 (Clause 7, 5.3), specifying dimensions and testing methods.

Summary Table: Paint Composition for Hessian Backing

If you need detailed physical requirements or tolerances, refer to Table 1 of IS 653 for thickness, width, and testing standards.

IS 653: Physical Requirements for Linoleum Sheets & Tiles

Additional Notes:

• Hessian backing shall not be painted unless specified (Clause 6.2).
• Tolerances apply at the time of actual cutting.
• Tests follow IS 9704:1980 methods.

This table summarizes all key physical requirements ensuring quality and conformity of linoleum products per IS 653.

IS 653: Marking and Packaging Key Points

Marking (Clause 9.2 & 9.3)

• Each box must be marked with:
  • Source of manufacture
  • Size and thickness
  • Manufacturer's batch number
• Sheets and tiles may also carry the Standard Mark.

Sampling & Conformity Criteria (Clause 5.3, Table 1)

Water Absorption Limits (Max %)

Sampling (Clause 10.1.2)

• Number of rolls for testing depends on lot size (refer Table 2 in IS 653).

This ensures proper identification, quality control, and compliance with IS 653 for linoleum sheets and tiles.

IS 653 Sampling Key Points

1. Sample Size for Rolls (Clause 10.1.2 & Table 2)

2. Selection Procedure (Clause 10.1.3)

• Use random number tables (IS 4905:1968) to select rolls randomly.
• If unavailable, use systematic sampling:
  • Calculate interval ( r = \lfloor \frac{N}{n} \rfloor )
  • Starting from any roll, select every ( r^{th} ) roll until sample size ( n ) is reached.

3. Tile Sampling (Clause 10.2.2)

• Sample size depends on lot size as per Table 3 (not provided here).
• Follow similar random or systematic selection.

This ensures statistically valid sampling for quality conformity testing.

IS 653: Criteria for Conformity (Clause 10.1.4 & Table 10.3)

Key Points:

• Sampling Plan for Sheets (Table 10.3):

• Conformity Criterion:

  • Test all rolls in the sample for specified requirements.
  • If defective rolls ≤ permissible number, the lot is accepted.
  • Otherwise, the lot is rejected or subjected to further action.

• Additional Notes:

  • Applies similarly for tiles with sample sizes and defective limits specified in Clause 10.3.
  • Marking with Standard Mark is per Clause 9.3 after conformity.

Summary:

• Use Table 10.3 for sample size and acceptance criteria based on lot size.
• Zero defects allowed for lots up to 1000 rolls.
• For lots >1000 rolls, 1 defective roll is permissible.
• Ensures quality control by statistical sampling.

flowchart TD
    A[Lot of Rolls] --> B{Lot Size?}
    B -->|<=50| C[Sample 3 Rolls]
    B -->|51-150| D[Sample 5 Rolls]
    B -->|151-300| E[Sample 8 Rolls]
    B -->|301-500| F[Sample 13 Rolls]
    B -->|501-1000| G[Sample 20 Rolls]
    B -->|>1000| H[Sample 32 Rolls]

    C --> I[Test Rolls]
    D --> I
    E --> I
    F --> I
    G --> I
    H --> I

    I --> J{Defective Rolls ≤ Permissible?}
    J -->|Yes| K[Accept Lot]
    J -->|No| L

IS 653 - Test Methods: Key Formulas, Tables & Specifications

1. Physical Characteristics & Tolerances (Table 1)

Water Absorption Limits by Thickness:

2. Sampling & Conformity Criteria

For Linoleum Rolls (Table 2):