Heading 2 length:* Minimum 200 words.
* *Heading 3 length:* Minimum 150 words.
* *Google NLP Score:* Positive, solution-oriented, high sentiment score.
9. **Deep Dive Word Generation & Quality Control:**
* Let’s write dense, highly technical paragraphs.
* For the chemistry section, discuss the molecular structure of wool (keratin protein chains held by disulfide bonds) and why high water temperatures or harsh alkaline chemicals break these bonds, causing shrinkage.
* For the leather section, discuss how leather is animal skin which contains natural lipids. When cleaned with high pH soap, saponification occurs, stripping the lipids and causing micro-cracks.
* For Sapy Trần Khánh Dư, discuss its legacy as a pioneer in Hanoi’s laundry scene, specializing in complex dry cleaning processes.
* Ensure all text is in Vietnamese, natural, highly persuasive, and fits the expert persona.
10. **Final Polish on the “No Quotes” Rule:**
* Check for any accidental `”` or `’` in text.
* Instead of: tiệm giặt “Sapy” -> tiệm giặt mang tên Sapy.
* Instead of: phương pháp “phun hút” -> phương pháp phun hút đa tầng.
* Instead of: hóa chất “sinh học” -> hóa chất hữu cơ sinh học.
* This is extremely important. I will execute a strict search-
