Paper opacity is the amount of showthrough from the back side of the sheet. The more opaque a paper is, the less the image or light shows through. Two things that contribute to opacity are the thickness of the stock (80# more opaque than 60#) and the finish of the paper.
Opacity is the ability of paper to hide or mask a color or object in the back of the sheet. A high opacity in printed paper allows one to read the front side of the page without being distracted by print images on the back side.
In general, the opacity of paper can be increased by such approaches as (a) adding or increasing the filler content, (b) adding titanium dioxide in particular, (c) minimizing self-agglomeration of fillers and making sure that they are well dispersed before addition to the furnish, and (d) avoiding excessive compaction
The term “ GSM ” stands for “grams per square meter.” For this standard, the weight of various types of paper is measured from a sample sheet cut to one square meter in size.
Rag paper contains 100% linen and/or cotton fibre and is therefore the highest quality and most expensive paper. Half- rag paper usually contains 50% rag fibre and 50% cellulose. There are also different grades of inexpensive paper made of 25% rag fibre and 75% cellulose.
Coated paper (also known as enamel paper, gloss paper, and slick paper) is paper that has been coated by a mixture of materials or a polymer to impart certain qualities to the paper, including weight, surface gloss, smoothness, or reduced ink absorbency.
Set transparency flattening options for printing Choose File > Print. Select Advanced on the left side of the Print dialog box. Select a flattening preset from the Preset menu, or click Custom to set specific flattening options.
The opacity of a coating is a measure of light that is incident on the coating divided by the amount of light that is transmitted [13–16]. In metallizing, this is more usually expressed as the optical density (OD) of the coating where OD is opacity expressed as a logarithm to base 10.
1a: obscurity of sense: unintelligibility. b: the quality or state of being mentally obtuse: dullness. 2: the quality or state of a body that makes it impervious to the rays of light broadly: the relative capacity of matter to obstruct the transmission of radiant energy.
Brightness measures the amount of reflectance of a specific wavelength of blue light. Brightness is measured on a scale of 0 to 100 – the higher the number, the brighter the paper. In other words, 95 bright paper reflects more light than an 85 bright paper, therefore appearing brighter.
In computing, opacity is often used in graphics software to define how “nontransparent” an image is. In other words, the more transparent an image or image layer is, the lower its opacity. Setting the opacity to 0 makes the layer completely transparent, or invisible.
paper thickness Low grade photocopier paper is around 80gsm; letterheads 100-120gsm with good quality letterhead around 120gsm. Business cards are around 350gsm and flyers around 300gsm-350gsm. Some papers seem thicker or bulkier than others, despite being the same weight.
– Multiply the average weight of swatches by 100 to calculate GSM of the sample fabric. (Normally, the area of round GSM cutter is 1/100 square meters.)
If you are in a company that’s very print intensive and prints the typical everyday documents such as invoices or purchase orders, it’s best to stick to an 80 gsm A4 paper. You wouldn’t want your productivity to be halted by a paper jam because you decided to go with a 70 gsm A4 paper, which is the paper jam culprit.