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Technical Requirements - We go to great lengths to prove your papers lasting integrity.

Starting with the selection of raw materials to ensure the right paper grade and right choice of dyes and pigments are used to support your technical requirements; whether that is optimal colourfastness, rub or bleed resistance, wet or dry strength.

With safety and hygiene still being of high concern for people, particularly for items such as packaging, we can also reduce risk from bacteria or viral contamination with our PaperGard™ silver ion product production.

Vanguard Sunlight Yellow 11 X2
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GSM

Commonly referred to as GRAMMAGE or g/m2.

Weight in grams of one square metre of paper or board. Measured in accordance with ISO 530 standard, tolerance of +/- 5%.

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Bowston Black 07648 X2
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Thickness

Commonly referred to as CALIPER.

Thickness of a sheet of paper or paperboard, measured under certain specifically stated conditions, usually measured in millionths of a metre (microns or μm). Measured in accordance with ISO 534 standard, tolerance: +/- 7.5%.

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Apollo Galaxy 00294 X3
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Bendsten Smoothness

Determining the roughness / smoothness of paper.

Bendtsen is a commonly performed test to determine the roughness / smoothness of paper and paper board products by a constant pressure air-flow method. The rate at which air passes through the sheet is expressed in millilitres per minute. Measured to ISO 2494 standard.

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120 A2145
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Bulk

Compactness property of a sheet in relation to its weight.

Compactness property of a sheet in relation to its weight (whose value decreases as compactness increases). Bulk is calculated as caliper divided by grammage. Bulk density is expressed as grams per millilitre g/mL

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Burst
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Burst

Resistance of paper to rupture when pressure is applied.

Resistance of paper to rupture when pressure is applied to a side by a specified instrument. Bursting strength is usually quoted in kPa (kilopascal). Measured to ISO 2758 standard.

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Tear
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Tear

Resistance of a paper sheet to tearing.

Resistance of a paper sheet to tearing, usually measured by the force required to tear a strip under standardised conditions. It is an important basic physical property of paper and paperboard. It is measured in both machine direction (MD) & cross direction (CD) and expressed as mN (mili Newton). Measured to ISO 1974 standard.

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Archival Boxboard Blue Grey 00168 X2
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Stiffness

The ability of paper or paperboard to withstand bending or crushing forces.

The ability of paper or paperboard to withstand bending or crushing forces. Stiffness is particularly important when determining the correct grade of paperboard for packaging applications. Stiffness also relates to other strength properties such as toughness, creasability and foldability. It is measured in both machine direction (MD) & cross direction (CD) and expressed as mN (mili Newton). Measured to ISO 5628 standard.

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Tensile
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Tensile

Resistant property of a sheet to pull or stress produced by tension.

Resistant property of a sheet to pull or stress produced by tension. Expressed as the force per unit width of a sample that is tested to the point of rupture. It is measured in both machine direction (MD) & cross direction (CD) and expressed as mN (mili Newton). Measured to ISO 1924-2 standard.

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Wax Pick
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Wax Pick

The Dennison Wax Pick test is for the evaluation of surface strength of paper.

The Dennison Wax Pick test is for the evaluation of surface strength of paper. Waxes are heated and applied to the surface of the sheet. After cooling, they are pulled from the surface and the wax stick is checked to see if it has pulled fibre from the surface. The highest value wax which does not rupture the surface is reported as the pick strength of the sheet.

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120 A2117
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Cobb

A test method for determining the water absorptiveness.

A test method for determining the water absorptiveness of sized paper and board measured under ISO 535 standard conditions. This identifies the quantity of water that can be absorbed by the surface of paper or board in a given time. A test piece is weighed immediately before and immediately after exposure for a specified time. The result of the increase in mass is expressed in grams per square metre (g/m2).

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120 A2379 X3
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Moisture

Percent of water by its weight in paper or paperboard.

Percent of water by its weight in paper or paperboard. This can vary according to atmospheric conditions because of the ability of the material to absorb or emit moisture. The ISO 287 test method specifies a method for determining the moisture content.

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120 A2366 Copy
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Relative Humidity

Moisture content gets measured as relative humidity (RH).

Moisture content gets measured as relative humidity (RH), and most papers are designed to be stable at 45-55% RH. Typically, manufacturers produce paper to an absolute moisture content making up a percentage of the paper's total weight.

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Digital Art Paper White 00188 X3
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CIE Whiteness

Test for white papers.

Test for white papers. Internationally Whiteness is the most commonly used measure as defined by the CIE (Commission Internationale de l'Eclairage - International Commission on Illumination). The CIE measure of whiteness is a measurement of the light reflected by the paper across the visible (daylight) spectrum. Measured under D65-100 daylight conditions.

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JC Kendal Manilla 07052 X2
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TAPPI Brightness

Brightness test for white papers.

Brightness test for white papers, as defined by the TAPPI (Technical Association of the Pulp and Paper Industry) is the measurement of the amount of reflectance of blue light.

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Lightfastness
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Lightfastness

The Blue Wool Scale measures and calibrates the permanence of colour.

The Blue Wool Scale measures and calibrates the permanence of colour. Traditionally this test was developed for the textiles industry but it has now been adopted by the paper and printing industries. A rating between 0 and 8 is awarded. For example, a Blue Wool 6 rating, is the minimum lightfastness required to meet international standards set by The Fine Art Trade Guild for limited edition prints.

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Rub Resistance
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Rub Resistance

Resistance of the paper surface to colour transfer.

Rub, abrasion, and scuff resistance describes the ability of paper or board to withstand marking or colour transfer during hand­ling in conversion and use. The Crockmeter is used to assess colour transfer in testing against ASTM F1319 and ISO 105-X12.

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