The Tembec Paperboard Group produces a fully-bleached paperboard product in an acid-free state. The following benefits are achieved:

1.	Longer usable product life span;
2.	Less natural deterioration as a result of ultraviolet light heat and time;
3.	Improved performance for some converting and printing processes by allowing the use of carbonate coating fillers.

For the best die cutting results, the Tembec Paperboard Group would like to suggest the following scoring techniques:

a)	In order to achieve a good crease profile, the female counter groove widths should be kept narrow, if possible. As a guide, the groove width should be equal to the sum of:
	1.  Machine direction: 1.3 × the board thickness plus the width of the scoring rule; 2.  Cross direction: 1.5 × the board thickness plus the width of the scoring rule. Note: 2 pt. scoring rule width is .028."
b)	It may be desirable, dependent upon the end application, to increase the female counter height by .002" to further enhance the crease profile.
c)	The height of the creasing rule is dependent upon the thickness of the paperboard and the type of counter being used.

If further information is required concerning the die cutting of our Kallima^® grades, please refer to www.kallimapaper.com.

Kallima^® C1S Folding is an ideal sheet for the manufacture of packaging. Its unique three-ply structure results in a sheet that is up to 10% lighter than our competition. Our calipers range from 10 pt. to 18 pt. To take full advantage of the possible savings we recommend the following to achieve the best results when die cutting our sheet. These are based on recommendations from Bobst for operation of a die cutter and, therefore, compatible with other SBS sheets.

Female Groove Width

Groove widths should be kept narrow to ensure a good crease profile. Grooves in the grain direction will be slightly narrower than those that are with the grain. To determine the applicable widths one can calculate them as follows:

Grooves with the Grain

The width is equal to 1.3 times the caliper of the board plus the width of the creasing rule being used. For our range of calipers a 2 pt. rule is used, a 2 pt. rule has a width of 0.028".

Grooves across the Grain

Here the width is equal to 1.5 times the caliper of the board plus the width of the creasing being used. As with grooves with the grain a 2 pt. rule is recommended.

Groove Depth

The depth of the groove should allow for penetration of the creasing rule and for some compression of the sheet at the bottom of the groove. Rule penetration should be 0.002" with a sheet compression of 0.001". This would mean that for a 12 pt. sheet the depth of the groove is 0.013".

Creasing Rule Height

The height of the creasing rule is a function of the type of counter being used and required groove depth.

Phenolic Resin Counter

First determine the height of the counter to be used. For a 12 pt. sheet the required groove depth is 0.013". The standard floor height for this type of counter is 0.06", therefore the required height of the counter is groove depth plus the floor height. As an example for our 12 pt.: Counter height = Groove Depth + Floor Height = 0.013" + 0.006" = 0.019" Creasing Rule Height   = 0.937" – Counter Height + Penetration = 0.937" – 0.019" + 0.002" = 0.937" – 0.017 = 0.920"

Paper is moisture conditioned so that it will stay flat and not develop wavy or tight edges before or during printing.

Wavy-edged paper can be temporarily corrected by storage in “hot room” temperatures (100o to 110oF) for several hours before printing, or by placing strip heaters or infrared lamps along the sides of the feeder pile near the top to warm and shrink the edges.

Over-drying will produce tight edges. On one and two-color presses, wavy-edged paper may need to be treated before each printing.

Dry or moist paper should be hung in a conditioning machine in lifts of 25 to 50 sheets depending on the weight of the paper. Modern machines use blowers and humidifiers, take little space, and require only 2 to 8 hours to condition paper.

Kallima products are delivered with a moisture proof barrier. The paper should remain wrapped in its moisture proof barrier until the paper is acclimatized to the print room conditions. The ideal print room conditions are 50% RH and 23°C (73°F). Failure to allow cold paper to reach the press room temperature can result in water condensing on the paper. This can cause wavy edges and creases during printing and converting resulting in misregistration and ink setting problems.