In the world of paper and printing, understanding the technical terms and abbreviations used to describe the physical properties of coating paper is crucial. Coating paper refers to paper that has been treated with a thin layer of coating, which can enhance its appearance, durability, and printability. The following is a detailed explanation of common abbreviations used to describe the physical properties of coating paper.
Caliper
C - Caliper refers to the thickness of the paper. It is typically measured in thousandths of an inch (mil) or micrometers (µm). A higher caliper indicates a thicker paper, which can be more durable but may also be heavier.
- Example: A coated paper with a caliper of 3.5 mil is thicker than one with a caliper of 2.5 mil.
Brightness
B - Brightness is a measure of the light-reflecting ability of the paper. It is often expressed as a percentage of the light reflected from the paper surface. Higher brightness values indicate a paper that reflects more light, which can make printed images appear more vibrant.
- Example: A coated paper with a brightness of 100% reflects all light, while one with a brightness of 85% reflects 85% of the light.
Opacity
O - Opacity refers to the ability of the paper to hide the image on the other side of the sheet. It is measured as the percentage of light that passes through the paper. Higher opacity values indicate a paper that is less transparent.
- Example: A coated paper with an opacity of 95% is less transparent than one with an opacity of 80%.
Stiffness
S - Stiffness is a measure of how rigid the paper is, which can affect how it performs in printing and binding processes. It is often measured in grams per centimeter (g/cm) or milligrams per meter (mg/m).
- Example: A coated paper with a stiffness of 150 g/cm is stiffer than one with a stiffness of 100 g/cm.
Tint
T - Tint refers to the color cast of the paper. It is typically described as yellow, blue, red, or green. Tint can affect the appearance of printed images and is important in certain applications, such as when matching specific color schemes.
- Example: A coated paper with a tint of 10Y (10% yellow) has a slight yellow color cast.
Tensile Strength
T - Tensile strength is the measure of the paper’s ability to resist tearing or breaking when tension is applied. It is often measured in pounds per inch (lb/in) or megapascals (MPa).
- Example: A coated paper with a tensile strength of 50 lb/in is more resistant to tearing than one with a tensile strength of 30 lb/in.
Water Resistance
W - Water resistance refers to the paper’s ability to resist water absorption. It is important in applications where the paper may come into contact with moisture. Water resistance is often rated on a scale from 0 (no resistance) to 5 (high resistance).
- Example: A coated paper with a water resistance rating of 4 is highly resistant to water absorption.
Understanding these abbreviations and their corresponding physical properties can help you choose the right coating paper for your specific printing needs. Whether you’re looking for a paper that is bright and glossy or one that is durable and resistant to water, knowing these terms can make all the difference.