Definition

1. Verb:
   • To desensitize (in photography): The primary technical meaning of "hãm nhạy" refers to the process of reducing the sensitivity of a photographic film or paper to light, often by using a chemical treatment. This makes the material less reactive, allowing for easier handling under certain lighting conditions or for specific development techniques.

Usage Examples

• Verb:
  • Trước khi xử lý trong ánh sáng vàng, cần phải hãm nhạy phim. (Before processing under a yellow safelight, it is necessary to desensitize the film.)
  • Kỹ thuật hãm nhạy giúp kiểm soát quá trình tráng phim tốt hơn. (The desensitizing technique allows for better control of the film development process.)

Advanced Usage

• This term is highly specialized and is almost exclusively used in the context of traditional, chemical-based photography (photographie chimique). It is not used in modern digital photography.

Variants and Related Words

• Sự hãm nhạy (noun): The act or process of desensitization.
  • Sự hãm nhạy đòi hỏi hóa chất chuyên dụng. (Desensitization requires specialized chemicals.)
• Thuốc hãm nhạy (noun phrase): Desensitizer; a chemical agent used for desensitizing.
  • Anh ấy đang pha chế thuốc hãm nhạy. (He is mixing the desensitizer.)

Synonyms

• Làm giảm độ nhạy: To reduce sensitivity. (This is a descriptive phrase, not a technical synonym.)
• Khử nhạy: To de-sensitize. (A less common alternative term with the same meaning.)

Notes on Meaning

• "Hãm nhạy" is a compound technical term. "Hãm" means to brake, slow down, or inhibit. "Nhạy" means sensitive. Therefore, the term literally means "to brake/inhibit sensitivity."
• It has no other common meanings in modern Vietnamese outside this specific photographic context. It is not used figuratively to mean making a person less sensitive or emotionally numb.