Which items are not suitable for transfer through xenon light transfer Windows?

Although xenon light transfer Windows has advantages such as efficient sterilization and no residue, they are not suitable for all items. The following are the types of items that are not suitable for transfer through xenon light transfer Windows and the reasons for this. Special attention should be paid when using them:
1. Items sensitive to light
Photosensitive materials/chemical reagents
Typical items:
Photographic film, photo paper, photoresist, photosensitive resin, fluorescent labeling reagents (such as FITC-labeled antibodies).
Risk:
The ultraviolet band (200-400nm) in xenon light may trigger photochemical reactions, leading to material deterioration, failure, or imaging distortion.
For instance, photoresists exposed to ultraviolet light will cure prematurely, affecting the precision of the photolithography process in semiconductor chip manufacturing.
2. Biological samples (specific types)
Typical items:
Fluorescently labeled cell samples, tissue sections stained with photosensitive dyes, and photosensitive viral vectors (such as photoactivated gene editing tools).
Risk:
Strong light may damage the fluorescent labels or active components in the samples, leading to deviations in the experimental results (such as weakened signals in flow cytometry detection).
2. Items that are easily damaged by strong light
Optical components/precision instruments
Typical items:
Lenses (such as microscope objective lenses, and camera lenses), laser lenses, gratings, prisms, and optical fiber end faces.
Risk:
High-intensity xenon light may cause a thermal effect on the surface of the lens, leading to coating peeling or a decline in optical performance (such as reduced light transmittance and increased stray light).
Direct light may form "light spots" on the surface of precision components, affecting the clarity of the image (such as contamination of the objective lens of a photolithography machine).
2. Plastic products (Some types)
Typical items:
Transparent soft plastics (such as PVC films, disposable polypropylene (PP) gloves), and plastic containers without added UV inhibitors.
Risk:
Long-term or frequent exposure may cause plastics to age and become brittle (such as containers cracking, and films becoming brittle and prone to damage), releasing microplastic particles.
3. Textiles/Fiber products
Typical items:
Colored fabrics (such as lab coats, rags), wool/silk products, and certain synthetic fibers (such as nylon ropes).
Risk:
Ultraviolet light may cause fabric fading and a decrease in fiber strength (such as making surgical towels brittle and prone to tearing), affecting the safety of use.
Iii. Items containing metals or highly reflective materials
1. Metal precision parts/coated devices
Typical items:
Integrated circuit chips (especially unpackaged bare chips), mirror-finished stainless steel devices, aluminum cavities, and gold-plated/silver-plated components.
Risk:
The reflection of strong light on the metal surface may trigger "secondary focusing", causing a sudden increase in local temperature and damaging components (such as the fuse of chip pins).
Reflection may interfere with the uniform irradiation of xenon light, creating sterilization dead zones (such as the grooves of instruments that are not effectively irradiated due to reflection).
2. Items with mirror-like or high-gloss surfaces
Typical items:
Glass mirrors, polishing metal tools (such as tweezers, and scissors), and high-gloss plastic casings (such as cosmetic packaging).
Risk:
Strong reflections may cause eye discomfort (such as glare) for operators and even damage their vision. At the same time, it may reduce the sterilization efficiency (the reflected light does not fully act on the surface of the object).
4. Flammable, explosive, or high-temperature sensitive items
Flammable and explosive substances
Typical items:
Organic solvents (such as ethanol, and acetone), aerosol cans (such as spray disinfectants), and gunpowder/pyrotechnic materials.
Risk:
The momentary flash of xenon light may generate a trace amount of static electricity or thermal effect, triggering the combustion or explosion of flammable and explosive substances (especially in high-concentration volatile environments).
2. Liquid items sensitive to high temperatures
Typical items:
Heat-sensitive biological preparations (such as vaccines and enzyme preparations), and certain chemical solutions (such as ph-sensitive buffers).
Risk:
Although xenon light is a "cold light source", prolonged exposure may accumulate heat (especially in a closed transfer window), causing the liquid temperature to rise and disrupting the stability of its components.
V. Oversized or complex-shaped items
Oversized and large items
Typical items:
Large equipment components (such as the inner liner of a reaction vessel), long strip pipes (such as stainless steel pipes), and instruments that exceed the inner cavity size of the transfer window.
Risk:
It cannot be fully accommodated within the transfer window, resulting in some surfaces not being irradiated and the existence of disinfection blind spots. Forced placement may damage the transfer window door body or seals.
2. Items with deep cavities or complex structures
Typical items:
Porous ceramic filter elements, instruments with slender tubes (such as colonoscopes and tracheal intubation tubes), and multi-layer packaged items (such as raw materials sealed in aluminum foil bags).
Risk:
Light has difficulty penetrating deep cavities or multi-layer packaging, and the interior cannot be effectively sterilized (such as residual microorganisms on the inner walls of pipes or the inner layers of packaging bags).
Vi. Other special scenarios where it is not applicable
Items that need to maintain humidity
Typical items:
Fresh fruits and vegetables (such as strawberries and lettuce), and moisture-sensitive Chinese medicinal materials (such as wolfberries and gastrodia elata).
Risk:
The air circulation inside the transfer window may carry away moisture, causing the items to dehydrate and deteriorate (such as wilting leaves and cracking of medicinal materials).
2. High-risk items that require chemical disinfection assistance
Typical items:
Instruments contaminated by prions (such as Creutzwicker disease pathogens) and waste containing a large amount of organic matter (such as swabs of pus and blood samples).
Risk:
Xenon light has a limited inactivation effect on prions and needs to be treated in combination with chemical reagents (such as sodium hydroxide). Organic matter may absorb light and reduce the sterilization efficiency.
Precautions before use
Read the item manual: Confirm whether there are prompts such as "Store away from light" and "photosensitive" marked.
Test compatibility: For items whose applicability is uncertain, a small-scale irradiation test can be conducted first (such as in corners or non-critical areas) to observe if there are any changes in appearance or performance.
Priority physical isolation transfer: For completely inapplicable items, mechanical transfer devices with double-door interlocks (such as conveyor belts) or manual cleaning and disinfection processes can be adopted instead.
By avoiding the above-mentioned unsuitable items and scientifically using the xenon light transfer window in combination with its characteristics, its efficient disinfection advantages can be maximized while avoiding damage to the items.