MEMBER'S QUESTION:
Here is my new question. How do I test the paper to be sure that the board combo weights are correct ? If we order a board combination of 42-26-42 how can I verify that the correct paper weights were used ? What test equipment and TAPPI standard should I use.

Thanks again for all your help.

ASKRALPH! RESPONDS:

Thank you for an easy to answer and  another good question this time.

The TAPPI test method for a basis weight analysis is “Grammage of Paper and Paperboard T-410”.  You will need to gently soak the sample apart in some warm water until the three components have separated from each other.  Take a single edge razor blade and gently scrape off the starch from the liners and the medium.  Be careful not to remove fibre.

The samples will need to be dried to 7 percent moisture. You will then need to measure the dimensions of the sample and then convert the weight per sample size into pounds per thousand square feet for the three components.  You can use an inexpensive scale to measure the weight of the samples.

Or, I could recommend an outside lab.  Surprise visits to your sheet suppliers to view the roll stock inventory and check production records and purchasing logs is always a good idea.