Substrates final 2-3

Which of the following is not an optical property of paper?

a. Color

b. Gloss

c. Opacity

d. Smoothness

d. Smoothness

Which of the following is not a physical property of paper?

a. Color

b. Porosity

c. Smoothness

d. None of the above

a. Color

A smooth, uniform paper is important in high-quality image reproduction.

True

False

True

Brightness is important for print contrast characterization. The higher the brightness, the higher the contrast between the paper and printed image.

True

False

True

Sufficient opacity is important to prevent printed text from showing through.

True

False

True

The paper industry has adopted a 60° specular gloss method (TAPPI T 480) to measure gloss for papers with a greater degree of diffuse reflectance.

True

False

False

Print gloss is generally based on a 75° specular gloss method.

True

False

False

The optimum optical density will give the highest contrast without flattening the shadow contrast.

True

False

True

As tone value decrease, the relative contrast of the printed images decrease – loss in sharpness of detail.

True

False

False

Print contrast is a measure of shadow contrast and is the degree to which viewers can distinguish printed tones in the shadow area of a reproduction. The higher the print contrast, the better the print quality of image.

True

False

True

The color gamut is the range of colors that a particular combination of printer, ink, and media can achieve. Higher volumes indicate the possibility of making more color combinations.

True

Paper is a hygroscopic substance. It readily absorbs and gives off moisture to conform to its environment. Tight edges are the result of moisture absorption by only the outside portion of a pile of paper and do not occur when an entire sheet is exposed.

False

Paper is a hygroscopic substance. It readily absorbs and gives off moisture to conform to its environment. Wavy edges result in saucer-shaped sheets as the outside edges of pile of paper lose moisture to dry by surrounding air.

False

This tightening of the edges will produce a sheet with raised corners and result can be wrinkling, inaccurate trimming, and faulty registration near the outer part of the press sheet.

True

Characteristic of paper, ink, or varnish that reflects relatively large amounts of light.

gloss

Subjective term referring to how well paper accepts ink.

Printability

In paper, the reflectance or brilliance of the paper

brightness

That property of paper that minimizes the show-through of printing from the back side or the next sheet.

Opacity

The property of paper that allows the permeation of air, an important factor in ink penetration.

porosity

In printing, the ability of a print to absorb light.

density

A phenomenon of halftone dots printing larger on paper than they are on films or plates.

tone value increase

A measure of shadow contrast and is the degree to which viewers can distinguish printed tones in the shadow area of a reproduction.

print contrast

A range of colors that a particular combination of printer, ink, and media can achieve.

color gamut