"Kobayashi Warm Baby" is a registered trademark of Japan's Kobayashi Pharmaceutical Co., Ltd. in China, and the "Warm Baby" that consumers are accustomed to calling is not the generic name of Warm Paste products. Shanghai Xiaolin Daily Chemical Co., Ltd. launched the "Warm Baby" brand warm paste in 2003, and the product was widely recognized by consumers as soon as it was listed, opening up the warm paste market that was almost blank at that time.
 
When people travel to Japan, they inevitably have to buy some medicines and daily necessities in drugstores, and those who are careful may find that Kobayashi Nuan Bao cannot be found in Japan, because Kobayashi Nuan Babies are all made in China and only sold in China, and Kobayashi Pharmaceutical uses different brand names in various countries and regions to sell, including Japan's Tung Ash and Britain's Cura-Heat.
 
The principle of heating the warm paste is that the basic redox reaction releases heat, and the raw material bag is filled with iron powder, salt, vermiculite, water and other raw materials, which will not react in the sealed state, and the heat begins to heat after tearing off the sealed package and permeating oxygen. Kobayashi warm baby's raw material bag is made of non-woven fabric imported from Japan, the pores are evenly distributed, the oxygen permeability speed is stable, and the fever is not too fast, it usually takes more than 6 minutes to reach about 40 °C, but it can also avoid feeling uncomfortable or scalding because of too fast fever. It uses high-quality Japanese thermal adhesive as the paste layer, and most of the warm stickers on the market use disposable adhesive, which cannot be adjusted after pasting.
 
The sticker type is the regular style of Kobayashi's warm baby, which is rectangular about the size of the palm of the hand, with a large heating area, and can be pasted on all parts of the body. In addition, there are also styles that are cut according to the waist, shoulders and neck, elbows and knees, soles and other parts, among which the shoulder and neck stickers are designed in three sections up to 30cm, which fits well with the shoulders and is one of the largest versions of the shoulder and neck stickers available on the market. The warm baby used during the menstrual period is actually a miniature warm baby with a smaller size, and the menstrual pain can be relieved to a certain extent through hot compresses. The average heating temperature of almost all styles of Kobayashi Warm Baby is 55°C, which is the highest among the brands on the list, which can provide enough heat, but the temperature is a little too high for large areas of hot compresses such as shoulders, neck, and waist.
 
Kobayashi Warm Baby can last up to 10 hours, which is not prominent among mainstream brands and is suitable for general commuting. When purchasing warm stickers, you should not blindly pursue too long heating time, warm stickers as personal items used when heating is inconvenient, pay attention to prevent low temperature burns, it is recommended to buy products according to the time you go out, and products with long heating time are usually thicker and heavier.
 
Kobayashi Nuan Baby is convenient to buy in offline supermarkets and online e-commerce platforms, but because most of the raw materials are imported from Japan, the price is expensive, and the shoulder and neck stickers and waist and abdomen stickers are about 10 yuan each, and other styles are about 3 yuan per piece.