amidol

A chemist carefully measures amidol in the laboratory.

Definition

1. Noun (countable, uncountable):
   • A chemical compound used as a photographic developer: "amidol" refers to a colorless crystalline compound, specifically 2,4-diaminophenol hydrochloride, that is employed as a reducing agent in black-and-white photography to develop film or prints. It is known for producing fine grain and high contrast.

Usage Examples

• Noun:
  • The photographer prepared a fresh solution of amidol to develop the negatives. (The chemical compound used for developing photographic film.)
  • Amidol is often preferred for its ability to yield sharp images with minimal grain. (The compound is chosen for its specific photographic properties.)

Advanced Usage

• "Amidol developer": a specific photographic developing solution containing amidol as the active reducing agent.

  • An amidol developer is commonly used for high-contrast prints. (A solution that includes amidol for developing photographic paper.)

• "Amidol reaction": the chemical process by which amidol reduces silver halides to metallic silver in photographic emulsions.

  • The amidol reaction proceeds quickly at room temperature. (The chemical reduction process occurs efficiently without heating.)

Variants and Related Words

• Amidol-based (adj): derived from or containing amidol.
  • The amidol-based formula is popular among darkroom enthusiasts. (The formula relies on amidol as a key ingredient.)

Synonyms

• Developer: a chemical agent used to make a photographic image visible.
• Reducing agent: a substance that causes reduction in a chemical reaction (here, converting silver halides to silver).

Related Idioms

• (No common idioms are associated with "amidol," as it is a specialized chemical term.)