Solid Contents

1.0 PURPOSE

1.1 To define a test method for determination of the solid contents in liquids (Ink / Toner / Adhesive / Hardener / VMCH / Foil Wash / OPV, etc.).

2.0 SCOPE

2.1 This STM applies to the Quality Control department.

3.0 REFERENCE(S) & ATTACHMENTS

3.1 References

3.1.1 In-house

3.2 Attachments

3.2.1 Nil

4.0 RESPONSIBILITY

4.1 QC Department Person:

4.1.1 To carry out the testing as per the STM.

4.2 QC Department Head:

4.2.1 To prepare and ensure the implementation of the STM.

4.3 QA Head:

4.3.1 To approve the new or revised STM, and to ensure the implementation of the defined system.

5.0 DISTRIBUTION

5.1 Quality Assurance

5.2 Quality Control

6.0 DEFINITION(S) & ABBREVIATION(S)

6.1 Definitions: Nil

6.2 Abbreviations: Nil

7.0 PROCEDURE

7.1 Collect samples of liquids (Ink / Toner / Adhesive / Hardener / VMCH / Foil Wash / OPV, etc.) as per the sampling plan.

7.2 Make sure that the sample is taken in a closed container / vessel so that the solvent inside cannot evaporate.

7.3 Make a small bowl shape using bare foil and weigh it. Note the weight.

7.4 Place a small quantity of ink into it.

7.5 Weigh this bowl and record this weight as W1. Also calculate W = W1 – bare foil weight.

7.6 Place this bowl into the oven at a temperature of 80-100°C for sixty minutes, then weigh again.

7.7 Note this weight and repeat the process until a constant value is obtained. Note this weight as W2.

7.8 Calculate W3 = W1 – W2.

7.9 Calculate the ink's solid contents using the formula below:

7.10 Solid Contents = (W3 x 100) / W

7.11 The result is in percentage (%). Record the results in the specified format.

8.0 REVISION HISTORY

+----------------+----------------+----------------+----------------+----------------+----------------+ | Revision No. | 00 | Effective | | CC No. | | | | | Date | | | | +----------------+----------------+----------------+----------------+----------------+----------------+ | Details of revision: New SOP | +-----------------------------------------------------------------------------------------------------+