Exploring

Correct!
The cotton gin provided a cheap source of cotton fibers and delayed the use of groundwood in paper.

Wrong: The answer is C.
The cotton gin provided a cheap source of cotton fibers and delayed the use of groundwood in paper.

Correct!
Lignin is a component of paper (primarily groundwood paper) that darkens on exposure to light.

Wrong: The answer is B and D.
Lignin is a component of paper (primarily groundwood paper) that darkens on exposure to light.

Correct!
Parchment turns a gray color due to the production of gypsum, it can become brittle (gelatinize) on exposure to light, and it can ripple due to high humidity.

Wrong: The answer is D.
Parchment turns a gray color due to the production of gypsum, it can become brittle (gelatinize) on exposure to light, and it can ripple due to high humidity.

Correct!
Acid hydrolysis and oxidation are both factors in the deterioration of collagen within leather. Traces of metal within the leather can act as catalysts for oxidation of sulphur dioxide.

Wrong: The answer is D.
Acid hydrolysis and oxidation are both factors in the deterioration of collagen within leather. Traces of metal within the leather can act as catalysts for oxidation of sulphur dioxide.

Correct!
Laser printing uses carbon inks. Iron gall ink is very acidic, ink jet printing is usually water soluble and subject to fading, and felt tip markers use dyes that fade and may be water soluble.

Wrong: The answer is B.
Laser printing uses carbon inks. Iron gall ink is very acidic, ink jet printing is usually water soluble and subject to fading, and felt tip markers use dyes that fade and may be water soluble.