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Question

Difficulty: EasyInferences from the Text

In medieval monastic scriptoria, scribes transitioned from using carbon-based inks to iron gall inks for manuscript production. Carbon inks, formulated by suspending lampblack soot in water with gum arabic, sat entirely on the surface of vellum and could be easily abraded or washed away if exposed to moisture. In contrast, iron gall ink—synthesized from oak galls, ferrous sulfate, and water—penetrated the porous fibers of vellum through a chemical reaction with the collagen matrix, creating permanent bonds that resisted superficial scraping. However, iron gall ink produced a sulfuric acid byproduct that, over centuries, gradually degraded the underlying parchment fibers in high-humidity environments.

Based on the passage, which of the following statements are logically supported by the text? (Select all that apply)

  1. Iron gall ink provided greater durability against surface abrasion than carbon-based ink.Answer
  2. B
    Medieval scribes abandoned iron gall ink as soon as they observed the acidic degradation of parchment.
  3. The long-term preservation of parchment written with iron gall ink is influenced by the moisture level of its storage environment.Answer
  4. D
    Carbon-based inks were incapable of preserving writing on vellum for more than a few decades.
  5. E
    Gum arabic chemically bonded carbon ink to the collagen matrix of the vellum.

Answer

The statements confirming that iron gall ink offered greater resistance to surface abrasion than carbon ink, and that ambient moisture levels influence the long-term preservation of parchment inscribed with iron gall ink, are both logically supported.
The passage establishes that carbon ink sat on the surface and was easily abraded, whereas iron gall ink formed bonds that resisted scraping, making the claim regarding greater surface durability directly supported. Furthermore, because fiber degradation by sulfuric acid occurred specifically in high-humidity environments, the claim that moisture levels influence long-term preservation is also logically entailed.

Step-by-Step Solution

1
Analyze the direct comparisons between carbon ink and iron gall ink characteristics.
Carbon ink remained strictly on the surface and was easily abraded, while iron gall ink penetrated fibers and resisted scraping, proving that iron gall ink provided superior resistance to superficial wear.
Direct comparison of stated physical bonding properties yields a valid deductive inference.
2
Evaluate the environmental conditions specified for iron gall ink deterioration.
The text specifies that acid degradation took place in high-humidity environments, demonstrating that moisture levels affect preservation.
Connecting the environmental condition (high humidity) to the consequence (fiber breakdown) supports the relationship between ambient moisture and longevity.
3
Eliminate unsupported claims, external historical assumptions, and conflated details.
Claims regarding scribe abandonment, arbitrary lifespan limits on carbon ink, and collagen bonding by gum arabic are identified as unsupported or inaccurate.
Inference questions require strict adherence to facts established within the passage boundaries.

Key Concept

Direct textual deduction and scope discipline in reading comprehension
Estimated Time:1m 0s
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Inferences from the Text

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