Complete Guide to Storing Figures to Protect Them from Deterioration | Humidity, UV, and Stickiness Countermeasures

To keep your precious figures obtained from Japan in beautiful condition for a long time, it is essential to have the right storage environment and regular maintenance. For collectors living overseas, storing figures in different climate conditions than Japan presents a particularly important challenge. In this article, we will scientifically understand the causes of figure deterioration and provide detailed practical methods for humidity management, UV protection, and preventing stickiness. Let's create an ideal storage environment to protect your valuable collection from deterioration.

Three Main Causes of Figure Deterioration

To effectively prevent figure deterioration, it is important to first understand the mechanisms of deterioration. The main causes of figure deterioration can be classified into three categories: damage from ultraviolet (UV) rays, the effects of humidity and temperature changes, and the phenomenon of plasticizer bleed. By understanding these causes, appropriate countermeasures can be taken.

Sunburn and Fading from UV (Ultraviolet) Rays

Ultraviolet rays are one of the biggest factors that deteriorate the paint on figures. The UV rays contained in direct sunlight destroy the pigment molecules in the paint, causing sunburn and fading. Bright colors, especially reds and blues, are particularly susceptible to UV damage, and noticeable discoloration can occur within a few months to a few years.

Indoor lighting should not be overlooked either. Fluorescent lights and incandescent bulbs emit a small amount of UV rays, which can gradually deteriorate the paint over long periods of exposure. Figures displayed near windows can be affected by UV rays even through curtains, so care should be taken with their placement.

Paint Peeling Due to Humidity and Temperature Changes

High temperature and humidity environments are a major enemy for figures. When high humidity persists, moisture can seep between the paint surface and the material, leading to peeling and lifting of the paint. In tropical regions or Southeast Asia, humidity levels often exceed 70%, and without appropriate measures, figure deterioration can progress rapidly.

Additionally, sudden temperature changes can also damage figures. Materials like PVC and ABS expand and contract with temperature changes, causing deformation of parts and loosening of joints. Areas directly exposed to cold air from air conditioners or near heating appliances should be avoided.

Stickiness from Plasticizer Bleed Phenomenon

The stickiness on the surface of PVC figures is caused by a phenomenon known as

By maintaining humidity below 50%, not only can you prevent paint peeling and discoloration, but you can also suppress the growth of mold and dust mites. Especially in high-temperature and high-humidity regions overseas, the introduction of air conditioning dehumidification functions or dehumidifiers is essential. During the rainy season or monsoon, humidity can reach 70-80%, so using dehumidifying agents in conjunction is effective.

Humidity fluctuates greatly depending on the season and weather. By using a digital hygrometer and choosing one with a maximum and minimum humidity recording function, you can conveniently grasp the daily humidity changes. If there are consecutive days with humidity exceeding 60%, take measures such as increasing the frequency of dehumidifier replacement or extending the operating hours of the dehumidifier.

Direct Sunlight and Indoor Lighting Placement

Direct sunlight is an element that should absolutely be avoided. Placing figures near windows increases the risk of deterioration from ultraviolet rays, even if curtains or blinds are closed. Choose a storage location for figures that is at least 2 meters away from windows and place them inside a room where direct sunlight does not hit as much as possible.

Indoor lighting also requires attention. Fluorescent lights and incandescent bulbs emit small amounts of ultraviolet rays, which can accelerate paint deterioration if exposed for long periods. If you install lighting specifically for figures, choose LED lighting that does not emit ultraviolet rays. LED lighting also generates less heat, making it advantageous for temperature management.

When utilizing curtains or blinds, choosing those with UV-cut functions is effective. Using blackout curtains or blackout roller screens can significantly reduce the intrusion of ultraviolet rays into the room during the day. Furthermore, applying UV-cut film to window glass allows for double protection against ultraviolet rays.

Humidity Management and Moisture Control Practices

Humidity management is one of the most important factors for long-term storage of figures. Especially in high-temperature and high-humidity regions overseas, it is difficult to keep figures in good condition without proper humidity control. Here, we will explain practical humidity management methods in detail, from choosing dehumidifying agents to how to use equipment and ventilation methods.

Choosing and Placing Dehumidifying Agents

Dehumidifying agents can be broadly divided into two types: "silica gel" and "calcium chloride." Silica gel has a humidity control function that keeps humidity around 40-50%, making it ideal for figure storage. On the other hand, calcium chloride has a high moisture absorption capacity and is effective when rapid humidity reduction is necessary, but it carries the risk of excessive drying.

When storing figures inside a display case, place a silica gel dehumidifier in the corners of the case. Ensure that the dehumidifier does not come into direct contact with the figures by placing it in a cloth bag or using a dedicated holder. The frequency of dehumidifier replacement varies depending on the environment, but generally, every 2-3 months is a guideline. Choosing a dehumidifier with a color-changing indicator makes it easy to see when it needs to be replaced.

Using a highly airtight acrylic case prolongs the effectiveness of the dehumidifier. However, if completely sealed, there is a possibility of moisture accumulating inside, so it is recommended to open the case for ventilation about once a month. If dehumidifying the entire shelf, place 1-2 dehumidifiers on each level, and install more on the lower levels where moisture tends to accumulate.

Effective Use of Air Conditioners and Dehumidifiers

The dehumidification mode of air conditioners is one of the most efficient humidity management methods for figure storage. The dehumidification mode can lower humidity without excessively lowering room temperature, allowing both temperature and humidity to be kept within appropriate ranges. Set the temperature around 25°C and adjust it to keep humidity below 50%.

When using a dehumidifier, consider whether to use a compressor type or a desiccant type. The compressor type is efficient in high-temperature and high-humidity environments, making it suitable for use in Southeast Asia and tropical regions. The desiccant type maintains dehumidification ability even in low-temperature environments, making it effective in winter in Europe and North America. Place the dehumidifier in the center of the figure storage room to ensure that the dehumidified air circulates evenly.

Balancing electricity costs is also an important consideration. Ideally, the air conditioner should run 24 hours a day, but if cost is a concern, you can operate it only during the night or on rainy days when humidity tends to be high. By using smart plugs or timers, you can automatically control the operating hours, allowing for effective humidity management while saving on electricity costs.

Importance of Regular Ventilation

If a sealed state continues for a long time, moisture can accumulate inside display cases or closets, increasing the risk of mold growth. Open the doors or cases of the storage location once or twice a month to allow fresh air in for ventilation. The best timing for ventilation is in the morning on sunny days. By doing it during times when the outdoor humidity is low, you can effectively expel moisture.

Using a fan or circulator during ventilation is more effective for circulating air. By creating airflow, dry air can reach the back of shelves and corners of cases where humidity tends to accumulate. A ventilation time of about 30 minutes to 1 hour is recommended, as leaving it open for too long may inadvertently draw in humidity from the outside.

When storing figures in closets or storage shelves, humidity can easily accumulate. It is important not only to regularly open the doors but also to place small dehumidifiers or desiccants in the storage space. Additionally, avoiding overcrowding the figures and ensuring airflow can help prevent humidity buildup.

Specific Methods for UV Protection and Sunburn Prevention

Once degradation from ultraviolet rays progresses, it cannot be reversed. Therefore, it is crucial to implement thorough UV protection from the stage of displaying figures. Here, we will explain practical methods to protect figures from ultraviolet rays, including how to choose UV-cut cases, select lighting, and design room layouts.

How to Choose UV-Cut Cases and Acrylic Cases

UV-cut cases are the most effective way to protect figures from ultraviolet rays. When selecting a product, always check the "UV cut rate." Products with a UV cut rate of 90% or more can almost completely block indoor ultraviolet rays. In particular, high-performance acrylic cases with a UV cut rate of 95-99% can be safely used even near windows.

Acrylic cases come in two types: base-integrated and collection case types. The base-integrated type protects individual figures one by one, making it the most reliable UV protection if the size fits. The collection case type allows multiple figures to be displayed together, providing good space efficiency and a cohesive display.

When selecting sizes, it is important to leave adequate space between the figure and the case. If the figure touches the case, plasticizers may adhere to the acrylic surface, or the paint may peel off. Ensure at least 2-3 cm of space on all sides, and if displaying multiple figures, make sure they do not touch each other. While UV-cut cases require an initial investment, they are the most reliable method for preserving the value of figures in the long term.

Choosing and Arranging LED Lighting

For lighting that beautifully illuminates figures, LED lighting is the optimal choice. Unlike fluorescent lights or incandescent bulbs, LEDs emit very little ultraviolet light, significantly reducing the risk of figure degradation even with prolonged exposure. Additionally, LEDs generate less heat, helping to keep the temperature around the figures low and preventing the bleeding phenomenon of plasticizers.

The color temperature of LED lighting greatly affects how figures appear. Daylight white (5000-5500K) reproduces the natural colors of the figure's paint faithfully, while bulb color (2700-3000K) creates a warm atmosphere. Choose according to the type of collection and personal preference. Selecting LED lights with dimming functions allows you to adjust brightness according to the time of day or mood, contributing to energy savings as well.

The distance between the lighting and the figures is also important. If the lighting is too close, even with LEDs, prolonged exposure may accumulate damage from subtle heat. Position the lighting at least 30 cm away from the figures, and if possible, use indirect lighting styles to illuminate the walls or ceiling, reflecting light onto the figures, which is ideal.

Layout Design to Avoid Window Placement

When designing the room layout, choose the storage location for figures to be as far from the windows as possible. Ideally, this would be on the inner wall side or a wall without windows. If the location is more than 2 meters away from the window, it will be almost unaffected by direct sunlight.

Utilizing UV-cut curtains or blinds is also effective. Blackout curtains can significantly cut ultraviolet rays and also help manage room temperature. If using roller screens or blinds, choose products with UV-cut functions. Keeping the curtains closed during the day and only opening them at night or on cloudy days is one method. Applying UV-cut film to all the windows in the room can prevent not only the figures but also furniture and floors from sunburn.

Tackling Stickiness: How to Prevent Plasticizer Bleeding

One of the most troublesome issues with PVC figures is stickiness caused by plasticizers. Once stickiness occurs, it is difficult to completely revert it, so prevention is the most important. Here, we will detail storage methods to prevent stickiness, how to deal with figures that have already become sticky, and the importance of blister storage for long-term preservation.

Storage Methods to Prevent Stickiness

The most effective way to prevent the bleeding phenomenon of plasticizers is to avoid high-temperature environments. Plasticizers begin to actively seep out at temperatures above 25°C, so it is essential to keep the storage temperature consistently below 25°C. Especially during summer or in tropical regions, use air conditioning to maintain the room temperature around 20-23°C.

It is recommended to store figures in their blister packaging (transparent plastic packaging) as is. Blisters have the property of absorbing plasticizers, which helps reduce bleeding onto the figure's surface. If the packaging has been opened, placing the figure in a UV-cut acrylic case and storing it with a dehumidifier can minimize the risk of stickiness.

Care must be taken with airtight storage. In a completely sealed environment, there is no escape for plasticizers, which may concentrate and seep out onto the figure's surface. Regularly opening the case for ventilation and replacing the internal air can prevent the accumulation of plasticizers. Additionally, storing figures in close contact can easily lead to stickiness at the contact points, so be sure to space them apart.

How to Deal with Already Sticky Figures

If stickiness occurs on the surface of a figure, prompt action is important. For mild stickiness, gently washing with lukewarm water diluted with neutral detergent is effective. Soak a soft sponge or cloth in the detergent solution and lightly wipe the sticky areas. After washing, rinse thoroughly with water and completely dry with a soft towel before allowing it to air dry.

Using oil-absorbing paper is also a simple and effective method. By lightly pressing facial oil-absorbing paper against the sticky areas, you can absorb the plasticizer that has seeped out onto the surface. Avoid rubbing hard, as this may cause the paint to peel off; just gently press it against the surface. Regularly wiping with oil-absorbing paper can slow the progression of stickiness.

There is also a method using baking soda. Wiping with a diluted baking soda solution (about 1 teaspoon of baking soda per 100ml of water) can neutralize and remove plasticizers. However, since baking soda has abrasive properties, it should not be used on painted surfaces and should be limited to unpainted parts only. Regardless of the method you try, it is recommended to test it on an inconspicuous area before applying it to the entire figure.

Importance of Blister Storage for Long-Term Storage

If you plan to store figures for an extended period, keeping them in their blister packaging is the safest option. Blisters have the property of absorbing plasticizers, significantly reducing bleeding onto the figure's surface. There is a clear difference in the occurrence of stickiness after 5 or 10 years compared to figures that have been opened.

When storing blisters, avoid direct sunlight and choose a location with low humidity. Since blisters are also made of plastic, they can degrade and become yellowed or brittle due to UV exposure. Storing them in a cardboard box or using UV-cut storage cases can protect the figures along with the blisters. While blister storage may not be aesthetically pleasing, it is the most reliable method for maintaining the condition of figures over the long term.

Storage Advice by Climate

For collectors living overseas, it is important to choose storage methods that suit the local climate conditions. By implementing appropriate measures for high humidity, dryness, or temperate climates, which differ from Japan, figures can be kept in good condition over the long term. Here, we provide specific storage advice by region.

Storage Methods for High Humidity Regions (Southeast Asia, Tropical Regions)

In Southeast Asia and tropical regions, the climate remains hot and humid throughout the year. It is not uncommon for humidity to reach 70-90%, making it one of the harshest environments for figures. When storing figures in this region, thorough dehumidification measures are absolutely necessary.

It is ideal for air conditioning to operate 24 hours a day. Keep the room temperature below 23°C and humidity below 50% using dehumidification or cooling mode. Even if electricity costs are a concern, it is recommended to keep the air conditioning running in at least the room where the figures are stored. Using a dehumidifier in conjunction can provide sufficient dehumidification even if the air conditioning temperature is set slightly higher.

The frequency of ventilation is also important. During the rainy season, the humidity of the outside air is very high, so ventilate only on sunny mornings and avoid opening display cases on rainy days. Replace dehumidifiers twice as often as usual to keep them fresh. Since bleeding of plasticizers is also likely to occur in high humidity regions, store figures in blister packaging whenever possible, and ensure that opened figures are stored in UV-cut cases with dehumidifiers.

Storage Methods for Dry Regions (Middle East, Parts of North America)

In some regions of the Middle East and North America, a dry climate characterized by humidity dropping to 20-30% is common. While the risk of deterioration due to moisture is low, excessive dryness can make PVC and ABS materials brittle, increasing the risk of parts breaking.

In dry regions, it is important to maintain moderate humidity. Use a humidifier to keep indoor humidity around 40-50%. However, over-humidifying can increase the risk of mold, so it is essential to monitor humidity levels with a hygrometer. Special care is needed during winter when heating can cause extreme dryness indoors.

Be cautious of static electricity as well. In dry environments, static electricity is more likely to occur, and dust can easily adhere to figures. Using anti-static spray and regularly removing dust can help maintain the appearance of your figures. UV protection is also important in dry regions. Since many areas have strong sunlight, it is crucial to use UV-cut cases and avoid placing figures near windows.

Storage Methods for Temperate Regions (Europe, North America, Oceania)

Temperate regions such as Europe, North America, and Oceania are characterized by significant climate changes due to the four seasons. It is necessary to adapt to extreme changes, with high humidity and temperatures in summer and low temperatures and dryness in winter. Adjusting storage methods according to the seasons is key to keeping figures in good condition.

In summer, humidity tends to rise, so it is important to strengthen dehumidification measures. Use the dehumidification mode on air conditioners to keep humidity below 50%. In regions with a rainy season, increase the frequency of changing dehumidifiers and ensure regular ventilation. In winter, indoor air can become dry due to heating, so it is important to maintain humidity above 40% with a humidifier.

Responding to temperature changes is also crucial. Rapid temperature changes can occur during seasonal transitions, so aim to keep indoor temperatures stable with air conditioning or heating. Particularly in spring and autumn, the temperature difference between day and night can be significant, so using an air conditioner with a thermostat to automatically adjust the temperature is convenient. UV strength also varies by season in temperate regions, so it is especially important to take UV protection measures in summer, such as applying UV-cut film to windows.

Regular Maintenance and Checklist

Just as establishing an appropriate storage environment is important, regular maintenance is equally crucial. By regularly checking the condition of figures and addressing any issues early, you can minimize deterioration. Here, we will explain the maintenance items to check monthly and annually, as well as actions to avoid.

Monthly Maintenance Items

Once a month, visually check the condition of your figures. Look for dust accumulation, stickiness, and any discoloration or peeling of paint. Early detection of stickiness is particularly important, so lightly touch the surface with your finger to check for abnormalities. If you feel any stickiness, immediately wipe it off with oil-absorbing paper.

For dust removal, use an air blower or a soft makeup brush. An air blower designed for camera lenses is ideal, as it can gently blow air to remove dust without touching the figure. For fine details or dust lodged in crevices, gently sweep it out with a soft brush. Never scrub with a hard brush or cloth.

Checking humidity and temperature is also a monthly checklist item. Check the maximum and minimum records on a digital thermometer-hygrometer to ensure they fall within the ideal range (temperature 20-25°C, humidity 40-50%). If they are outside this range, review the air conditioner's settings or the placement of dehumidifiers. Also, check the condition of the dehumidifiers to ensure they have not reached their moisture absorption limit. If using dehumidifiers with color indicators, you can determine when to replace them based on color changes.

Annual Thorough Check Items

Once a year, conduct a more detailed thorough check. Examine the condition of the paint in detail, checking for fading, discoloration, or fine peeling. Bright colors like red and blue are particularly susceptible to UV damage, so it is a good idea to compare them with photos taken at the time of purchase to check for any discoloration.

Check for looseness or deformation of parts. Ensure that joints are not loose and that parts are not becoming easy to detach, reinforcing with adhesive if necessary. If parts have deformed due to temperature changes, it may be necessary to review the storage temperature. Also, check the condition of bases and stands for any deterioration or damage.

Maintenance of dehumidifiers and UV-cut cases should also be done annually. Replace all dehumidifiers with new ones, and clean UV-cut cases with acrylic cleaner to remove dirt. If there are scratches or cloudiness on the case, it may indicate reduced UV-cut performance, so consider replacing it. Review the storage location once a year, and if a better environment is available, consider changing the layout.

NG Actions to Avoid During Maintenance

There are several NG actions to avoid during figure maintenance. The most important is to avoid washing with water. Submerging the entire figure in water or rinsing it with tap water can cause water to enter the joints, leading to rust and mold forming from the inside. When cleaning dirt, it is best to gently wipe with a cloth that is only slightly damp.

Please also absolutely avoid using alcohol or thinner. These solvents can dissolve paint or alter PVC materials. Nail polish remover and melamine sponges can also damage the paint, so do not use them. When removing stickiness, choose gentle methods that are friendly to the figure, such as diluted neutral detergent or oil-absorbing paper. Scrubbing with hard brushes or scrubbing pads can also damage the paint, so always use a soft cloth or brush.

Summary: Storage Strategies to Protect Figures Long-Term

To store figures in good condition over the long term, it is essential to create an appropriate environment based on scientific understanding and to perform regular maintenance. Summarizing the points discussed so far, here are the key points and checklist for storage. By implementing these, you can protect your valuable collection from deterioration and maintain its beautiful condition for a long time.

Three Key Points for Storage Environment

The basics of figure storage are to control three elements: temperature, humidity, and UV light. Maintain a temperature of 20-25°C, paying particular attention not to exceed 25°C. This temperature management is crucial to prevent the phenomenon of plasticizer bleeding. It is recommended to use air conditioning to maintain a constant temperature and to monitor it continuously with a digital thermometer.

Aim for a humidity range of 40-50%, controlling it to not exceed 50%. In high-temperature and high-humidity areas, use air conditioning in dehumidification mode along with dehumidifiers, while in dry areas, maintain appropriate humidity with a humidifier. Since humidity can fluctuate with the seasons and weather, it is important to check daily changes with a digital hygrometer and to add dehumidifiers or ventilate as necessary.

UV protection is crucial because once deterioration progresses, it cannot be reversed, so it is important to be thorough from the start. Use acrylic cases with a UV cut rate of over 90% and place them away from windows. Choose LED lighting that does not emit UV light and absolutely avoid direct sunlight. By properly controlling these three elements, you can significantly delay the deterioration of figures.

Regular Maintenance to Prevent Deterioration

Regular maintenance is essential for maintaining the condition of figures over the long term. During monthly maintenance, remove dust with an air blower or soft brush and check for stickiness. Review the records of temperature and humidity to ensure they are within the ideal range. Check the condition of dehumidifiers and replace them as necessary.

During the annual thorough check, carefully examine for paint fading or discoloration, looseness or deformation of parts. Replace all dehumidifiers with new ones and check the condition of the UV cut cases. If there are scratches or cloudiness on the case, it may indicate reduced UV cut performance, so consider replacing it. Regular maintenance allows for early detection and resolution of issues, helping to keep your valuable collection in beautiful condition for a long time.

For Further Learning

For those who want to learn more about figure storage methods, please also check the parent article Complete Guide to Purchasing Japanese Figures from Overseas. It provides comprehensive information for those living abroad, including purchasing methods, precautions during transport, and customs measures.

Additionally, for those struggling with figure package storage, the related article How to Keep Figure Boxes in Good Condition is also recommended. It details methods to prevent box deterioration and space-saving storage techniques. Refer to these articles to enjoy your figure collection in the best condition.