I'm sorry, I'm not familiar with a specific 'hold my hand' Korean soap. There are so many Korean soaps out there. Maybe it's a relatively unknown or new one. You could try searching for it on some dedicated K - drama platforms or forums for more details.
As I'm not familiar with the 'king gallon story', it's difficult to determine its significance. It might be significant in terms of entertainment value if it's a fictional story. Or it could hold cultural or religious importance if it's part of a specific belief system. But without knowing the story, it's all speculation.
I haven't heard of the 'king gallon story' before. It could be a story from a particular region, a family tradition, or even a made - up story for a specific purpose. Without more context, it's hard to tell what it is about.
I'm not sure specifically as there could be various 'gallon man stories'. It might be about a character who is related to gallons in some way, like a man who measures or represents gallons in a unique story for educational purposes, perhaps teaching about volume measurement in gallons.
The difference between liquid soap and liquid laundry was their active ingredients and starting materials. The active substance of the soap was mainly soap base, and its starting material came from regenerative plants. The active substance of the laundry liquid was mainly coconut acid dialcoholamid (a surface active agent), and its starting material was crude oil. In addition, the soap liquid contained a soap-based active ingredient, which was similar to grease in structure. It was more effective in removing grease stains, and it was easy to separate from the fabric, improving its bleachability. On the other hand, the laundry liquids mostly used non-ion-type surface active agents, which were close to neutral, mild to the skin, and degraded faster after being discharged into the natural world. In addition, the formula structure and implementation standards of soap and laundry liquid were also different. In general, soap was superior to laundry liquids in terms of gentleness, grease removal ability, and bleachability.
Not having much information on the 'hold my hand korean soap', we can only assume some general plot lines. It could be about a group of friends who support each other through different life challenges. Maybe one of them is in a relationship that has its ups and downs. The soap might also explore cultural aspects of South Korea, like traditional family values and modern lifestyle clashes. It could also have a sub - plot about career development and how the characters balance their personal and professional lives.
I'm not sure specifically what the 'gallon king story' is without more context. It could be a story about a person who has something to do with gallons, like maybe a king in a fictional land where gallons of something are important, or perhaps it's a nickname for someone in a real - life story related to gallons.