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DboSource::_quoteFields() - CORE/Cake/Model/Datasource/DboSource.php, line 2977
DboSource::conditions() - CORE/Cake/Model/Datasource/DboSource.php, line 2746
DboSource::buildStatement() - CORE/Cake/Model/Datasource/DboSource.php, line 2011
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DboSource::read() - CORE/Cake/Model/Datasource/DboSource.php, line 1184
Model::_readDataSource() - CORE/Cake/Model/Model.php, line 3040
Model::find() - CORE/Cake/Model/Model.php, line 3012
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CakeEventManager::dispatch() - CORE/Cake/Event/CakeEventManager.php, line 243
Controller::startupProcess() - CORE/Cake/Controller/Controller.php, line 677
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 189
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167
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DboSource::name() - CORE/Cake/Model/Datasource/DboSource.php, line 916
DboSource::_quoteMatchedField() - CORE/Cake/Model/Datasource/DboSource.php, line 3001
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DboSource::_quoteFields() - CORE/Cake/Model/Datasource/DboSource.php, line 2977
DboSource::conditions() - CORE/Cake/Model/Datasource/DboSource.php, line 2746
DboSource::buildStatement() - CORE/Cake/Model/Datasource/DboSource.php, line 2011
DboSource::buildAssociationQuery() - CORE/Cake/Model/Datasource/DboSource.php, line 1729
DboSource::read() - CORE/Cake/Model/Datasource/DboSource.php, line 1184
Model::_readDataSource() - CORE/Cake/Model/Model.php, line 3040
Model::find() - CORE/Cake/Model/Model.php, line 3012
SiteController::beforeFilter() - APP/Controller/SiteController.php, line 455
CakeEventManager::dispatch() - CORE/Cake/Event/CakeEventManager.php, line 243
Controller::startupProcess() - CORE/Cake/Controller/Controller.php, line 677
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 189
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167
[main] - APP/webroot/index.php, line 110

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DboSource::name() - CORE/Cake/Model/Datasource/DboSource.php, line 916
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DboSource::_quoteFields() - CORE/Cake/Model/Datasource/DboSource.php, line 2977
DboSource::conditions() - CORE/Cake/Model/Datasource/DboSource.php, line 2746
DboSource::buildStatement() - CORE/Cake/Model/Datasource/DboSource.php, line 2011
DboSource::buildAssociationQuery() - CORE/Cake/Model/Datasource/DboSource.php, line 1729
DboSource::read() - CORE/Cake/Model/Datasource/DboSource.php, line 1184
Model::_readDataSource() - CORE/Cake/Model/Model.php, line 3040
Model::find() - CORE/Cake/Model/Model.php, line 3012
SiteController::beforeFilter() - APP/Controller/SiteController.php, line 468
CakeEventManager::dispatch() - CORE/Cake/Event/CakeEventManager.php, line 243
Controller::startupProcess() - CORE/Cake/Controller/Controller.php, line 677
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 189
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167
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DboSource::name() - CORE/Cake/Model/Datasource/DboSource.php, line 916
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preg_replace_callback - [internal], line ??
DboSource::_quoteFields() - CORE/Cake/Model/Datasource/DboSource.php, line 2977
DboSource::conditions() - CORE/Cake/Model/Datasource/DboSource.php, line 2746
DboSource::buildStatement() - CORE/Cake/Model/Datasource/DboSource.php, line 2011
DboSource::buildAssociationQuery() - CORE/Cake/Model/Datasource/DboSource.php, line 1729
DboSource::read() - CORE/Cake/Model/Datasource/DboSource.php, line 1184
Model::_readDataSource() - CORE/Cake/Model/Model.php, line 3040
Model::find() - CORE/Cake/Model/Model.php, line 3012
SiteController::blog() - APP/Controller/SiteController.php, line 1354
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Controller::invokeAction() - CORE/Cake/Controller/Controller.php, line 491
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 193
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167
[main] - APP/webroot/index.php, line 110

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Quality Grinds in the Calender Stack Bring Strength Improvements

Published on September 16, 2026

Roll-grind quality is a key factor in maintaining consistent containerboard production performance. Measurements from a recent evaluation indicate that tight-tolerance grinding can improve strength characteristics in the board, contributing to a more uniform product across the machine.

A Southern containerboard mill contacted Precision Roll Grinders to improve variability in strength performance through tight-tolerance calender roll grind. Working with specialists from Precision Roll Grinders, a single roll was serviced, returned to production, and monitored over several weeks to assess production improvements. The containerboard’s caliper variation was monitored, showing a reduction of over 70% in 2-sigma CD caliper variation in the collected data. With improved caliper variation, calender roll loading can be reduced to improving the strength quality of the sheet. The data confirmed measurable improvements in Mullens strength characteristics, highlighting the impact that tight-tolerance grinds can have on strength in the paper-making process.

Mullens strength values showed greater stability, with reduced week-to-week variation and less fluctuation in strength retention with an increase in Mullens strength overall. Steadier performance points to a more predictable sheet structure when passing through the calender nips. This observed improvement illustrates that tight-tolerance grinding can enhance strength consistency and product stability within the calender section, supporting mills in producing a stronger, more reliable, and more profitable containerboard product.

Contact your local Precision Roll Grinders account manager for more information.

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