The special paper for drug instructions is printed on bible paper, which is a mature and universal choice in the industry, core to meeting the usage requirements of "concise content, portability, and cost control".
Core Characteristics and Adaptability of Bible Paper Thin, light and high-density: Bible paper typically has a basis weight of 28-60g/㎡. It is thin but dense in fibers, enabling it to carry a large amount of text within limited space (drug instructions often contain dense information such as ingredients, usage, and contraindications).

Good ink absorption: Ink penetrates evenly during printing, resulting in clear and non-smudged text that meets the strict requirements for information accuracy in drug instructions.Moderate toughness: It is not easily damaged after folding, facilitating storage with drug packaging. It also resists slight friction, maintaining readability over a long period.

Cost-effective: For the same number of pages, bible paper uses much less material than ordinary paper, reducing the overall cost of drug packaging and meeting the needs of large-scale production.

Supplementary Notes
Some high-specification drug instructions use "thin offset paper" as a substitute. With a slightly higher basis weight (45-50g/㎡), it feels stiffer, but the core adaptation logic is consistent with bible paper.
Bible paper is divided into bleached and unbleached types. Most drug instructions adopt the bleached type to ensure printing clarity and visual comfort.