Pap-Tech Engineers & Associates

The Cobb Sizing Tester evaluates the water absorbency of Board-based materials by measuring the weight increase of a sample after exposure to water for a specified time. It is an essential quality control tool for assessing the material's resistance to water, ensuring performance in various applications like printing and packaging.

1. Material Construction:

   • Made of stainless steel, ensuring durability and resistance to corrosion.
   • Includes a stainless steel roller for drying the wet sample after testing.

2. Rotational Mechanism:

   • Equipped with a circular pan that rotates 180°, facilitating even water exposure.

3. Spring-Loaded Clamping System:

   • Ensures a leak-proof seal by pressing the cylinder against the sample on a rubber mat.
   • The clamping force is adjustable, and the cylinder can be easily lifted by pinching two handle bars together.

4. Tilting Lid Design:

   • The lid is secured using spring-loaded finger grips, allowing for smooth operation.

1. Sample Preparation:

   • Measure the GSM (grams per square meter) of the circular sample of paper or paperboard.
   • Place the sample in the circular pan filled with water.

2. Testing:

   • Rotate the pan 180° to ensure uniform water exposure.
   • Allow the sample to sit in the water for a specified duration.

3. Absorbency Measurement:

   • After exposure, remove the sample and weigh it to determine the water absorbed.
   • Use the stainless steel roller to press and dry the sample.

4. Final Calculations:

   • Measure the GSM of the dried sample.
   • Compare the before-and-after weights to calculate the water absorptiveness or Cobb value.

• Cobb Value Definition:
  The mass of water absorbed in a specific time by one square meter of material under controlled conditions.
• Applications:
  Evaluates additives applied during manufacturing that enhance printing quality and liquid resistance.
• Materials Tested:
  Paper Board, and corrugated fiberboard.

• Provides accurate and reproducible results.
• Ensures better material selection for water-resistant applications.
• Enhances the quality of products by verifying resistance to liquids.

The Cobb Sizing Tester is a simple yet indispensable tool for ensuring board-based materials meet industry standards for water resistance.

The Cobb Sizing Tester evaluates the water absorbency of paper-based materials by measuring the weight increase of a sample after exposure to water for a specified time. It is an essential quality control tool for assessing the material's resistance to water, ensuring performance in various applications like printing and packaging.

1. Material Construction:

   • Made of stainless steel, ensuring durability and resistance to corrosion.
   • Includes a stainless steel roller for drying the wet sample after testing.

2. Rotational Mechanism:

   • Equipped with a circular pan that rotates 180°, facilitating even water exposure.

3. Spring-Loaded Clamping System:

   • Ensures a leak-proof seal by pressing the cylinder against the sample on a rubber mat.
   • The clamping force is adjustable, and the cylinder can be easily lifted by pinching two handle bars together.

4. Tilting Lid Design:

   • The lid is secured using spring-loaded finger grips, allowing for smooth operation.

1. Sample Preparation:

   • Measure the GSM (grams per square meter) of the circular sample of paper or paperboard.
   • Place the sample in the circular pan filled with water.

2. Testing:

   • Rotate the pan 180° to ensure uniform water exposure.
   • Allow the sample to sit in the water for a specified duration.

3. Absorbency Measurement:

   • After exposure, remove the sample and weigh it to determine the water absorbed.
   • Use the stainless steel roller to press and dry the sample.

4. Final Calculations:

   • Measure the GSM of the dried sample.
   • Compare the before-and-after weights to calculate the water absorptiveness or Cobb value.

• Cobb Value Definition:
  The mass of water absorbed in a specific time by one square meter of material under controlled conditions.
• Applications:
  Evaluates additives applied during manufacturing that enhance printing quality and liquid resistance.
• Materials Tested:
  Paper, paperboard, and corrugated fiberboard.

• Provides accurate and reproducible results.
• Ensures better material selection for water-resistant applications.
• Enhances the quality of products by verifying resistance to liquids.

The Cobb Sizing Tester is a simple yet indispensable tool for ensuring paper-based materials meet industry standards for water resistance.