China Guangzhou Guxing Freeze Equipment Co.,Ltd Company News

  Freeze-dried powder usually refers to cosmetics or skin care products rich in active ingredients, and its efficacy varies depending on the type of product. Generally speaking, freeze-dried powder can have the following skin effects: 1. Moisturizing: Freeze-dried powder contains a variety of moisturizing ingredients, such as hyaluronic acid, glycerin, etc., which can help the skin hydrate and moisturize, making the skin softer and moisturized. 2. Antioxidant: Some ingredients in freeze-dried powder have antioxidant effects, such as vitamins C, E, etc., which can effectively resist the damage caused by free radicals to the skin and reduce the occurrence of spots and fine lines. 3. Whitening: Some freeze-dried powders contain whitening ingredients, such as arbutin, ferulic acid, etc., which can lighten skin spots and brighten skin tone. 4. Improve skin quality: Freeze-dried powder also contains some ingredients that improve skin quality, such as collagen, elastin, etc., which can increase skin elasticity and improve skin sagging.

                               The difference between freeze drying and oven drying  The difference between freeze-drying and oven drying is as follows: Working principle: Freeze-drying is the sublimation of water, which changes the moisture in the food directly from solid to gaseous state; drying is the evaporation of water, that is, the moisture is changed from liquid to gaseous state.  Food quality and nutritional content: Freeze-drying can better retain the nutritional content and taste of food, while drying may destroy the nutritional content of food due to high temperature, making the food taste worse.  Color: The color of freeze-dried fruits is brighter, while the color of oven-dried fruits is darker.  Shape: The shape of freeze-dried fruits changes little, while the shape of drying fruits will shrink a little. Drying temperature and time: When freeze-drying, the ingredients are first frozen, and then sublimated and dehydrated, the temperature is low and the time is short; when drying, the ingredients are placed in a high-temperature environment, and the water is evaporated through heating, the temperature is higher and the time is longer.  Scope of application: Freeze-drying is suitable for ingredients that need to ensure taste and nutritional content; drying is suitable for some high-temperature-resistant ingredients. Manufacturing cost: Freeze-drying requires the use of specialized refrigeration equipment and vacuum drying equipment, which is costly; drying costs are relatively low. 

Freeze-drying pet food offers several benefits for both pets and their owners. Here are some advantages of using freeze-dried pet food: Nutritional Integrity: Freeze-drying preserves the nutritional integrity of pet food. The low-temperature drying process helps retain the natural vitamins, minerals, and enzymes present in the ingredients. This ensures that pets receive a diet that is rich in essential nutrients, promoting their overall health and well-being. Enhanced Palatability: Freeze-dried pet food often maintains the natural flavor and aroma of the ingredients, making it highly palatable for pets. The freeze-drying process concentrates the flavors, intensifying the taste and making the food enticing to picky eaters. This can be especially beneficial for pets that have a reduced appetite or are transitioning to a new diet.   Improved Digestibility: Freeze-dried pet food is often easier to digest compared to other forms of pet food. The freeze-drying process breaks down the cell structure of the ingredients, making them more readily digestible for pets. This can be particularly beneficial for pets with sensitive stomachs or digestive issues. Convenience: Freeze-dried pet food offers convenience for pet owners. It has a long shelf life, does not require refrigeration, and is lightweight and easy to store. This makes it an excellent option for pet owners who travel with their pets or prefer to stock up on pet food in advance. Portion Control: Freeze-dried pet food can be easily portioned and measured. The lightweight and dry nature of freeze-dried food make it simple to control the amount of food given to pets, ensuring they receive the appropriate serving size according to their specific dietary needs. Safety and Longevity: The freeze-drying process effectively removes moisture from pet food, inhibiting the growth of bacteria, mold, and other microorganisms. This helps to extend the shelf life of the food without the need for preservatives or additives. It also reduces the risk of food spoilage and contamination

The freeze-drying market is growing as more and more people become aware of the benefits of freeze-dried products and more companies use this technology to meet customer preferences, such as improving flavor and texture and increasing nutritional retention.   Benefits of freeze-dried food: 1. Extended Shelf Life up to 25 years 2. Nutritional Value: remain 98% 3. Lightweight and Portable: 20% 4. Retention of Flavor and Texture: as good as fresh 5. Convenience and Versatility     The history of freeze-dried food dates back to the early 20th century. The process of freeze drying, also known as lyophilization, was developed as a method to preserve food for military and space exploration purposes.   In the 1930s, freeze drying gained attention as a potential solution for preserving blood plasma and other medical supplies during World War II. The process involved freezing the material and then subjecting it to a vacuum to remove the frozen water by sublimation, without going through a liquid phase. This resulted in a lightweight, shelf-stable product that could be easily rehydrated when needed.   After the war, the technology was adapted for the food industry. The first freeze-dried meals for consumers were introduced in the 1960s, primarily for outdoor enthusiasts and adventurers. These meals offered lightweight, compact, and long-lasting food options that could be reconstituted with water in the wilderness.   Freeze-dried food gained popularity in the 1970s and 1980s as a convenient and nutritious choice for emergency preparedness, camping, and space travel. It was extensively used in the space programs of various countries to provide astronauts with lightweight and nutrient-rich meals during their missions.   Over time, freeze-dried food has evolved to include a wide range of options, including fruits, vegetables, meat, dairy products, and even complete meals. The process has advanced with improved technologies and equipment, allowing for better preservation of flavors, textures, and nutritional value.   Today, freeze-dried food is not only used for emergencies and outdoor activities but also finds applications in military rations, food storage, backpacking, and everyday convenience. It offers the advantages of extended shelf life, reduced weight, minimal storage space requirements, and the ability to retain the original taste, texture, and nutritional content of the food.

How to make beautiful Freeze-drying pitaya ?   The process in which the pitaya is peeled and sliced, then frozen in a low-temperature and low-pressure environment to remove the moisture.   Here is a common method to freeze-dry dragon fruit: Prepare the dragon fruit: Choose a ripe dragon fruit, the skin should be bright and elastic. Cut the dragon fruit into thin slices or small pieces, making sure the slices are evenly sized, this will help with an even freeze-drying process. Pre-freeze: Arrange the sliced dragon fruit slices evenly on a freezer plate or baking sheet, making sure they are not touching each other too much. Then place the freezing tray in the freezer to pre-freeze at -18°C or lower, which helps freeze the dragon fruit quickly and retain its shape and color.   Arrange in the freeze dryer: Transfer the prefrozen pitaya slices to the freezer tray of the freeze dryer, making sure there is appropriate space between them. Place the tray into the device according to the freeze dryer instructions. Freeze-drying process: Start the freeze-dryer and adjust parameters such as temperature, pressure and time according to the settings of the equipment. The freeze-drying process may take several hours or even longer, depending on the thickness of the dragon fruit and the performance of the freeze dryer.   Completion of freeze-drying: Once the freeze-drying process is complete, the lyophilizer will signal or indicate completion. At this point, the dragon fruit should be dry and crispy. Storage: Place freeze-dried dragon fruit slices in an airtight container or vacuum bag to prevent moisture and air from entering. Store in a dry, cool place away from direct sunlight.   Freeze-dried dragon fruit can be eaten directly as a healthy snack, or used to make preserves, sauces, juices, or other culinary uses. Please note that freeze-dried dragon fruit may become fragile and brittle, so handle and store with care.

Freeze-drying is one of the most sophisticated food preservation processes, which consists of quickly freezing a product at very low temperatures until it reaches the triple point of water. This, already converted into tiny ice crystals, is removed through the application of vacuum, producing sublimation. The water contained in the product passed from the solid to the gaseous state without passing through the liquid again. In this way the flavor and aroma are preserved, as well as the nutritional characteristics for long periods of time. It is ideal for preserving food, pharmaceutical and biological products.   Here are some key points of freezed dried food；   1. Extended Shelf Life ： 10 years 2. Nutritional Value: remain 98% 3. Lightweight and Portable: 20% 4. Retention of Flavor and Texture: as good as fresh 5. Convenience and Versatility 6. Reduced Food Waste 7. Emergency Preparedness  

The Benefits of having a home freeze dryer include:   1. Food Preservation: A home freeze dryer allows you to preserve a wide variety of foods at their peak freshness. You can freeze-dry fruits, vegetables, meats, dairy products, leftovers, and even complete meals. It helps retain the original taste, texture, and nutritional value of the food while extending its shelf life significantly.   2. Quality Control: With a home freeze dryer, you have complete control over the quality of the food you preserve. You can choose the ingredients, ensure their freshness and quality, and prepare them according to your preferences. This level of control allows you to create high-quality freeze-dried food that meets your standards.   3. Convenience and Flexibility: Having a freeze dryer at home provides convenience and flexibility in the preservation process. You can freeze-dry food items whenever it is convenient for you, whether it's excess produce from your garden, seasonal fruits, or bulk purchases. You can also customize portion sizes, create personalized meal plans, and have a ready supply of freeze-dried food on hand.   4. Cost Savings: While a home freeze dryer is an investment, it can lead to long-term cost savings. By freeze-drying food at home, you can take advantage of sales, bulk purchases, or discounts on perishable items. It allows you to preserve food before it spoils, reducing food waste and saving money on buying commercially freeze-dried products.   5. Nutritional Value Retention: Home freeze dryers preserve the nutritional content of food effectively. The freeze-drying process involves freezing the food and then removing moisture through sublimation, which helps retain essential vitamins, minerals, enzymes, and other nutrients. As a result, the freeze-dried food retains much of its original nutritional value.   6. Customization and Variety: With a home freeze dryer, you can customize the freeze-dried food to suit your preferences and dietary needs. You can combine ingredients, create unique recipes, and tailor the food according to specific dietary restrictions or preferences. It allows you to have a diverse range of freeze-dried meals, snacks, and ingredients readily available.   7. Reduced Storage Space: Freeze-dried food takes up significantly less storage space compared to other preservation methods like canning or dehydrating. The removal of water during freeze-drying reduces the volume, allowing for more efficient storage in your pantry or kitchen cabinets.   It's important to note that operating a home freeze dryer requires knowledge of the process, proper handling of equipment and food, and appropriate storage methods to maintain the quality and shelf life of the freeze-dried food. However, the advantages of food preservation, quality control, convenience, and cost savings make a home freeze dryer a valuable addition for individuals who want to preserve food at their own convenience and with control over the process.

The development history of freeze dryers, also known as lyophilizers, spans several decades and includes significant advancements in technology and applications. Here is a brief overview of the key milestones in the development of freeze dryers:   1. Early Developments (1900s-1940s): The concept of freeze drying emerged in the early 20th century as a method to preserve vaccines and blood products. The first commercial freeze dryers were introduced in the 1930s and utilized a batch process with limited control and efficiency.   2. Expansion to Food Industry (1940s-1950s): In the 1940s, freeze drying techniques were adopted by the food industry for preserving fruits, vegetables, and other perishable food items. This led to the development of larger-scale freeze dryers and improvements in process control.   3. Advancements in Technology (1960s-1970s): In the 1960s and 1970s, freeze dryer technology advanced significantly with the introduction of new refrigeration systems, vacuum pumps, and control systems. This resulted in more efficient and automated freeze drying processes.   4. Applications in Pharmaceuticals and Biotechnology (1980s-1990s): Freeze drying gained prominence in the pharmaceutical and biotechnology industries during the 1980s and 1990s. The development of specialized freeze dryers allowed for the preservation of delicate drugs, vaccines, and biological samples while maintaining their potency and stability.   5. Process Optimization and Automation (2000s-2010s): In recent decades, there has been a focus on optimizing freeze drying processes and improving automation. Advanced control systems, sensors, and monitoring technologies have been integrated into freeze dryers, allowing for more precise control over temperature, vacuum levels, and drying cycles.   6. Advances in Equipment Design (2010s-Present): Ongoing developments in freeze dryer design have led to the introduction of advanced features such as shelf freeze dryers, rotary freeze dryers, and continuous freeze drying systems. These innovations have increased productivity, reduced processing time, and expanded the range of applications.   Throughout its development history, freeze drying technology has evolved to encompass various industries, including food, pharmaceuticals, biotechnology, research, and more. The continuous advancements in equipment design, process control, and automation have made freeze drying a widely used method for preserving and stabilizing sensitive materials.