Why Only the Leftmost Figure in My Display Case Yellowed: Understanding Sunlight Patterns After Five Years

Summer 2019: Why Two Figures Purchased the Same Day Changed Differently

The skirt color on the Alter 1/7 scale figure standing at the left end of my display case had noticeably faded. The figure on the right, opened and displayed the same day, remained pristine, while the left one had lightened by about one tone overall. Since I'd pre-ordered the character in summer 2019, it had spent five years in the display case. At first I assumed it was a manufacturing difference. But two figures from the same product, same lot, opened the same day shouldn't differ this much.

The cause was simple. The left end of the display case was near the living room window, and sunlight slanting in between 2 and 4 PM passed through the glass door and grazed only the left shelf. It wasn't direct sunlight—I had curtains drawn. But reflected light alone was enough over five years. PVC is vulnerable to ultraviolet rays. Red-spectrum pigments fade first especially.

After that day, I rearranged my display case placement and began adjusting figure positions according to seasonal solar altitude. Let me give you the conclusion up front: managing sunlight is more important than buying a display case. No matter how good the case, if you don't understand light patterns, you'll regret it five years later.

Direct Sunlight vs. Reflected Light: Which Is More Dangerous?

Direct sunlight must obviously be avoided. A figure placed under direct summer afternoon sun at 2 PM will show visible changes in three months. But reflected light is actually more frightening in practice. Because you don't notice it. The moment you think "my place is fine because I keep the curtains drawn," light bouncing off walls wraps around the side of your display case.

There's a case that circulated in online communities in the early 2020s. A collector who placed a display case in an apartment living room with white wallpaper discovered discoloration on just one side of their figures after only one year. The display case was on the opposite side from the window. But afternoon sunlight reflected off the white wall and hit the back of the case, and the glass door had no UV protection. Reflected light still contains ultraviolet rays. Half the brightness doesn't mean half the danger.

Season is also a variable. Summer solar altitude is 76 degrees; in winter it drops below 30 degrees. Even in the same display case, top shelves near the ceiling get sun exposure in summer, while lower shelves get it in winter. Truly safe positions year-round are fewer than you'd think.

UV-Blocking Glass Doors: Do They Really Work?

The difference between glass doors with UV-blocking film and regular glass is clear. The IKEA DETOLF display case released in 2018 has no UV protection. Meanwhile, some Japanese manufacturers offer figure-specific cases claiming 99% UV blocking. Is there really a difference?

Comparing over five-year periods shows the difference. Figures in UV-blocking glass discolor at roughly one-third the rate under the same conditions. It doesn't block everything completely. Some UV-A spectrum still passes through, and blue light from visible spectrum also contributes to PVC degradation. But the difference between five years and fifteen years is significant.

The problem is price. UV-blocking display cases cost more than twice regular products. The alternative is UV-blocking film. Applying 3M or domestic products directly to glass doors costs one-fifth as much. Installation difficulty isn't high. Just be careful not to create bubbles. I applied it myself in winter 2020 and have been using it without problems for four years now.

However, film reduces transparency slightly. The characteristic clarity of glass becomes hazier, and a subtle cloudiness appears depending on angle. Those who frequently take social media photos should consider this. It's a question of choosing transparency or the condition of your figures five years from now.

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Varying Discoloration Rates by Position: Dividing Your Display Case into Zones

Even within the same display case, risk levels differ by shelf. In my experience, the safest spots are the middle shelves, toward the back corners of the case. When light enters from the front, the backs of figures are shielded, and front-row figures block reflected light from the sides. Conversely, the most dangerous spots are the top shelf edges and the bottom shelf.

The top shelf receives ceiling light head-on. Even LED lighting emits trace amounts of ultraviolet rays. Eight hours a day for a year equals 2,920 hours. Better than fluorescent lights, but not negligible. The bottom shelf gets winter low-angle sunlight bouncing off the floor. Risk increases especially in homes with marble or tile flooring due to higher reflectivity.

There's a "figure rotation" method that became popular in communities after Wonder Festival 2021. You change figure positions within the display case every three months. This distributes discoloration risk better than leaving them in the same spot for five years. It is tedious. But in a market where out-of-print scale figures trade for over 200,000 won, investing thirty minutes every three months isn't bad insurance.

Prize Figures vs. Scales: Do They Differ in Sunlight Durability?

Prize figures are cheaper than scales. But the conventional wisdom that they have lower sunlight durability is only half true. It was true through the mid-2010s. Prize figures back then used inferior pigments and faded noticeably in six months. But around 2020, SEGA Prize and Banpresto brands raised their pigment standards. Under the same conditions, they've caught up to about 80% of scale figure performance.

The problem is clear parts. The transparent PVC often used in prize figures is especially vulnerable to ultraviolet rays. Clear-treated hair tips and effect parts yellow within a year. Scale figures have the same issue, but prize figures have a higher proportion of clear parts, making it more noticeable.

Nendoroids and figmas are primarily ABS material, which has higher UV resistance than PVC. But the paint layer is still vulnerable. Especially exposed joint sections on figmas and face parts on Nendoroids will fade if left under direct sunlight for over five years. The paint dies before the material.

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Seasonal Solar Altitude and the Art of Display Case Placement

In summer, the sun rises high. At midday altitude of 76 degrees, it's nearly directly overhead. At this time, even display cases right next to windows are relatively safe. Light enters vertically, illuminating only the floor without penetrating inside the case. Winter is the opposite—dangerous. At midday altitude of 30 degrees, sunlight slants deeply inward. Even a display case three meters from the window gets sunlight at 2 PM.

One practical tip: use a smartphone compass app to check solar azimuth. Recording the sun's position at 2 PM in summer and winter lets you find year-round safe spots. I used this method in spring 2022 to move my display case to the north wall of the living room, and discoloration cases have virtually disappeared since.

If your home lacks a north-facing window, curtains are the answer. But blackout curtains are overkill. They darken the entire room, making daily life inconvenient. I recommend two layers of thin lace curtains instead. They filter 50% of light while keeping the interior bright. White curtain color is better than beige. Beige absorbs light and converts it to heat; white reflects it. Even reflected light is less dangerous when dispersed.

Planning for Five Years Ahead: Regret-Free Display Case Management

Buying figures is a commitment measured in five- or ten-year units. Release dates are wishful thinking, but once in hand, they last. So display case placement should also look five years ahead. Choose positions that won't fade in five years over spots that look pretty right now.

A few principles I follow: First, out-of-print scales go exclusively to the middle-back of the case. Low reissue probability means no way to replace them if they discolor. Second, frequently reissued Good Smile popular characters can go on top shelves in front. Even if they fade, you can wait for a reissue. Third, prize figures are rotation priority one. They're cheap anyway, so moving them frequently is no burden.

UV-blocking film, curtains, placement adjustments. Following just these three will halve your regrets five years later. There's no perfect method. But doing something is better than doing nothing. Figures look beautiful in light, but light kills figures. How you manage this contradiction is the collector's homework.

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FAQ

Do LED lights also fade figures?

LEDs emit one-tenth the ultraviolet radiation of fluorescent lights, but blue light still contributes to PVC degradation. If left on over eight hours daily, subtle discoloration can occur over three-year periods. Managing lighting time with a timer or developing the habit of turning lights on only for display can extend their lifespan.

Can already discolored figures be restored?

Discoloration from PVC pigment decomposition itself is irreversible. If it's surface contamination, you can wipe it off with neutral detergent and cotton swabs, but molecular structural changes from ultraviolet rays cannot be reversed. Prevention is the only answer. Some collectors attempt airbrushing to repaint, but perfectly reproducing original colors is difficult.

Is it okay to display openly without a case?

Open display exposes figures to both dust and sunlight. If you can accept weekly dust removal and position them on a north wall in a windowless room, it's possible. But over five-year periods, discoloration rate is two to three times faster than inside a case. The advantage of open display is angle flexibility and photography convenience. It's better suited for short-term exhibition than long-term storage.

Is sunlight management necessary even in winter?

The winter sun's low altitude makes it penetrate deep indoors. It's actually more dangerous than summer. Around 2 PM, slanting sunlight often precisely penetrates lower display case shelves. Check solar paths seasonally, and be more careful with curtains in winter. When indoor temperature rises from heating, PVC degradation rate also accelerates.

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May good fortune visit your display case today as well.