About Purchasing
Q: What payment terms do you offer?
A: Please contact our sales representative for inquiries. This site does not support online purchases. Common options include T/T (bank transfer) and other terms depending on order value and customer history. We’ll propose the best option for your order.
Q: How can I place an order?
A: Contact us first, then send us: (1) product type + material, (2) thickness, (3) size/quantity, (4) mirror type (silver/color/two-way/anti-fog), (5) processing needs, (6) destination & shipping preference.
Q: What is your MOQ?
A: MOQ depends on material + thickness + color + processing (cutting/printing/coating). Send your requirements and we’ll quote the MOQ and best cost option.
Q: Can you do custom sizes and shapes?
A: Yes, cut-to-size, custom shapes, holes, rounded corners, and edge finishing are available.
Q: What is the typical lead time?
A: Lead time depends on material availability, thickness, special coatings, and processing requirements. We will confirm a production schedule after your specification is finalized.
Q: Shipping Method Description
A: Small samples typically ship by courier/air. Large sheets and bulk orders usually ship by sea/road freight with stronger packaging to control damage risk and landed cost.
Q: What should I do if goods arrive damaged?
A: Contact us within the agreed time window with photos/videos of outer cartons/crates, labels, and the damaged sheets. We’ll help you determine whether it’s handling, packaging, or carrier damage and propose a solution.
Q: Can I get samples before placing a bulk order?
A: Yes. We can supply sample pieces (standard sizes or cut-to-size) so you can test reflectivity, color, and processing.
Q: Do you offer refunds or replacements if quality is not as agreed?
A: We support after-sales solutions based on the agreed spec and inspection standard. If there’s a confirmed quality issue, we’ll work with you on replacement, credit, or refund depending on the case.
Q: I don’t know the exact spec, can you recommend the best option?
A: Yes. Tell us your application (toy, signage, display cover, cosmetic mirror, panel, etc.), environment (indoor/outdoor), size, and budget target. We’ll recommend a spec that works.
Q: Can you provide drawings/templates for approval?
A: Yes. For custom cutting, we confirm drawing files, tolerances, and edge requirements before production.
Q: Can you match a reference sample from my current supplier?
A: Yes. Send a sample or detailed specs/photos, and we’ll propose the closest match and confirm with a pre-production sample if needed.
Q: Instructions for Transport Packaging
A: We use protective masking, interleaving (when needed), rigid support, and reinforced corner/edge protection.
About Specifications
Q: What thicknesses are commonly stocked for polycarbonate mirror?
A: Polycarbonate mirror is commonly cited in 0.118″ and 0.236″ (about 3 and 6 mm), with variations such as see-thru or first-surface available.
Q: What thicknesses are commonly stocked for PETG mirror?
A: PETG mirror is commonly sold in thinner gauges such as 0.040″ – 0.118″ (~1 – 3 mm), catering to fast fabrication and lightweight parts.
Q: What thicknesses are typical for PS mirror sheets in the market?
A: Many PS mirror offerings in commerce are in the ~1 – 3 mm range, though availability depends on the producer and whether the base is GPPS vs HIPS.
Q: What sheet sizes are commonly available for acrylic mirror?
A: A common standard size is 48″ × 96″ (1220 mm × 2440 mm), with additional non-stock/custom ranges offered (e.g., up to 80″ × 120″ cited for one line). We can ship according to standard specifications or customize dimensions to meet your requirements.
Q: What thicknesses are commonly stocked for acrylic mirror?
A: One common offering cites 0.060″ to 0.236″ (about 1.5 – 6.0 mm) for clear acrylic mirror sheets, with thinner/thicker availability depending on product family and region. Our primary manufacturing process utilizes extruded polystyrene boards, enabling us to control thicknesses from a minimum of approximately 0.5mm to a maximum of approximately 10mm.
Q: What customization options are available for acrylic mirror products?
A: Common customization includes colors, textures/patterns, and cut-to-size (“run-to-size”), with colored sheets often supplied with laser-cuttable film masking depending on product line.
About Technology
Q: What is a “plastic mirror sheet,” and how is it typically manufactured?
A: Plastic mirror sheets are typically thermoplastic sheets (PMMA/acrylic, PC, PETG, etc.) that receive a mirror finish via vacuum metallizing (often aluminum), plus protective back-coatings and surface masking for fabrication/handling.
Q: Is the reflective layer usually aluminum or silver?
A: Many commercial plastic mirror sheets use aluminum deposited by vacuum metallizing, then protected by coatings/paint; confirm exact stack-up per supplier because some systems use films or additional coatings.
Q: What reflectivity should I expect from acrylic mirror sheets vs glass mirror?
A: A commonly published range for mirrored acrylic is ~85 – 90% reflectivity across the visible spectrum, which is generally slightly lower than high-quality glass mirrors (and more sensitive to flatness/handling). Based on this foundation, Donghua can achieve a reflectivity of over 90%, delivering high-definition reflective effects.
Q: Why can plastic mirrors look “wavy” compared with glass?
A: Plastic mirror sheets are more flexible than glass; distortion increases with thin gauges, imperfect substrates, or uneven adhesive contact. Thicker sheet and rigid, flat backing reduce (but may not eliminate) distortion.
Q: Are plastic mirror sheets suitable for “precision” reflection (e.g., optical alignment, makeup mirror requiring true flatness)?
A: Many general-purpose plastic mirror sheets are explicitly not intended for precise image reflection due to potential imperfections/distortion; select thickness carefully and consider specialized optical-grade products if needed. Regarding thickness selection, Donghua Mirror Glass can achieve thickness tolerances within ±0.02mm, ensuring light transmittance suitable for your specific industry.
Q: What’s the difference between first-surface and second-surface plastic mirrors?
A: In second-surface mirrors, the reflective layer is behind the clear substrate (more protected); first-surface mirrors reflect from the front and are used when reflection is needed from both directions or where back exposure matters.
Q: What is a “see-thru / two-way” mirror sheet in plastics?
A: A see-thru (two-way) mirror uses a semi-transparent reflective coating that reflects part of incident light while transmitting the rest; performance depends on lighting conditions (bright side appears reflective).
Q: How do break-resistance claims compare among acrylic, PETG, and polycarbonate mirrors?
A: One manufacturer guide states approximate break-resistance multipliers vs glass: acrylic ~5×, PETG ~14×, and polycarbonate ~20× (all at equal thickness), reflecting typical impact-performance hierarchy.
Q: What protective masking should I expect on mirror sheets?
A: Mirror sheets are often furnished with protective masking/film on the mirror face; manufacturers commonly advise leaving masking on through storage/fabrication to prevent damage.
Q: When should protective masking be removed?
A: A polycarbonate fabrication guide warns that masking cannot withstand prolonged direct outdoor exposure and may degrade and become hard to remove; best practice is removal soon after installation (product-dependent).
About Performance
Q: How UV-stable is acrylic (PMMA) compared with polycarbonate?
A: PMMA sheet families are often described as naturally UV-stable and weatherproof, while polycarbonate typically needs UV-stabilized grades or coatings to better resist yellowing and maintain appearance.
Q: What temperature exposure is reasonable for acrylic mirror?
A: A mirrored acrylic guide cites continuous service up to roughly 160°F (71°C) with occasional short-term exposure higher; grade-specific datasheets should be used for final design limits.
Q: What temperature range is stated for PETG sheet?
A: A PETG sheet datasheet gives a service temperature range of -40°C to +60°C, which is a strong starting point for PETG-based mirror designs (verify per product construction).
Q: Can I bend plastic mirror sheets?
A: Line/strip bending is described as feasible with careful, localized heating; Acrylic 143 – 163°C, PC 171 – 185°C, PETG around 137°C, and warns overheating can cause “blushing” (reflective loss).
Q: How can I improve scratch resistance for acrylic or polycarbonate mirrors?
A: We offer abrasion-resistant (AR) / scratch-resistant coatings (e.g., AR coatings for PC mirror, scratch-resistant coating options for acrylic mirror families); these can materially improve durability in high-touch installations.
Q: How UV-stable is polystyrene (PS)?
A: A PS sheet datasheet states PS is not recommended for long-term open-air use because UV radiation can cause yellowing, gloss loss, and decreased mechanical strength (with darker formulations performing better).
Q: Is PETG available in UV-protected versions?
A: Yes—one PETG datasheet describes PETG grades as non-UV protected for internal use only and offers a coextruded UV layer on one or two sides upon request, with testing confirmed via yellowness index/light transmission/mechanical property retention (details on request).
Q: What temperature exposure is reasonable for polycarbonate mirror?
A: A polycarbonate fabrication guide states polycarbonate has excellent heat resistance with continuous service temperature up to ~100°C, and mirror datasheets show high heat deflection temperatures typical of PC.
Q: What temperature exposure is reasonable for PS sheet?
A: A GPPS sheet datasheet lists continuous service around 60°C, short-term to 80°C, and minimum service around -40°C, so PS mirror is generally best kept away from high-heat applications.
Q: Can humidity cause warpage in plastic mirror sheets?
A: One mirror guide notes mirror sheet can absorb moisture and high humidity may cause temporary warpage, which should be considered in design and storage.
About Applications
Q: What are the typical applications of different mirror materials?
A: Acrylic mirror for POP displays/security mirrors/home furnishing; PC mirror for abusive/high-traffic/security environments; PETG mirror for toys/cosmetics/office supplies; PS sheet for indoor decorative solutions and easy vacuum forming (PS mirror often aligned with indoor decor/POP).
Q: Which mirror substrate is best for high-abuse/security locations?
A: Polycarbonate mirror is commonly positioned as the top choice for strength, security, and abusive environments, with “virtually unbreakable” messaging and security-focused applications (detention centers, hospitals, gyms).
Q: When is PS mirror (polystyrene mirror) typically used?
A: PS mirror is typically selected for low-cost indoor decorative/POP applications where high security strength is not required; base PS sheet is described as economical/easy to process and intended for indoor use.
Q: If outdoor use is required, what should I change in product selection?
A: If outdoor use is unavoidable, you generally need UV-engineered substrates and coatings (e.g., UV-cap layers for PC or PETG) and you still must validate the mirror layer/backcoat durability, because “outdoor stability” depends on the full construction, not only the base polymer.
Q: When is PETG mirror a better choice than acrylic mirror?
A: PETG mirror is often described as a general-purpose mirror with higher impact strength and lower cost than acrylic mirror for certain thin-gauge, high-volume uses (e.g., toys/POP).
Q: Are mirror sheets recommended for exterior/outdoor use?
A: One mirror fabrication guide states mirrored sheets are not recommended for exterior use; if used outside anyway, it advises sealing the perimeter to keep moisture out and notes salt spray can degrade mirror surfaces and protective paint layers.
Q: Are there marine-grade or specialty mirror options?
A: Some product families offer marine-grade acrylic mirror options and specialty constructions; verify grade-specific corrosion/salt-spray performance and installation sealing requirements.
About Processing
Q: What cutting tools are recommended for straight cuts (general guidance)?
A: For straight cuts, manufacturers recommend minimizing vibration and using appropriate blades (e.g., carbide tipped, triple-chip geometry) with smooth, even feed to avoid chipping/gumming.
Q: Can I laser cut plastic mirror sheets?
A: Laser cutting is described as feasible for mirrored plastic sheets with proper safety, fume extraction, and parameter testing; manufacturers caution that lasers can create stress along cut lines and recommend annealing if cementing is planned. Donghua possesses several laser cutting machines capable of achieving precise cutting of plastic mirrors.
Q: How should I drill holes to reduce cracking/chipping?
A: A common recommendation is using bits designed/modified for plastics (sharper point angle, appropriate rake/clearance), using a drill press where possible, and avoiding heat build-up via air/water mist cooling.
Q: How do I reduce “dimpling” and distortion when mechanically fastening?
A: Use oversized holes, avoid over-tightening, support the bottom edge (trim/ledger) for large sheets, and mount to a rigid flat backing to prevent bowing and localized distortion.
Q: Which adhesives are commonly suggested for mirrored plastic sheets?
A: One manufacturer guide suggests several 3M options (e.g., polyurethane sealant, spray adhesive, double-coated polyester tape, VHB) but stresses that compatibility testing for at least 72 hours is necessary.
Q: Can mirrored sheets be thermoformed (vacuum formed) like clear sheets?
A: Acrylic/PC/PETG mirror sheets can be gently cold-formed but cannot be thermoformed, reflecting the risk of damaging the reflective layer/backcoat (clear sheets may be thermoformed, but mirror constructions often cannot).
Q: Can acrylic mirror be die-cut (steel rule die) like PETG mirror?
A: Acrylic mirror is often described as not die-cuttable for typical processes, while PETG mirror is commonly described as suitable for die cutting/punching (especially thin gauges).
Q: Is water-jet cutting recommended for plastic mirror sheets?
A: Not recommended, because it can leave micro-notches that may develop into cracks and compromise integrity.
Q: Should I countersink screw holes on plastic mirror sheets?
A: One mirror-sheet guide emphasizes oversized holes and avoiding overtightening to prevent dimpling/distortion; where countersinking is needed, follow the sheet family’s detailed fabrication instructions because stress concentrations can trigger cracking.
Q: What’s the best practice for adhesive mounting to reduce distortion?
A: Adhesive mounting should be done onto a smooth, rigid, flat backing; irregularities in the support surface can telegraph through and distort reflection. Some adhesives require porous surfaces for solvent/water escape—follow adhesive manufacturer instructions and test compatibility.
Q: Why do some adhesives damage plastic mirrors?
A: Some adhesives contain solvents (toluene, ketones, hexane) that can attack backcoats/reflective layers; a guide warns adhesives with ~5%+ solvents are not recommended and that pre-testing is required.
Q: Why is flame-polishing discouraged on mirror sheet edges?
A: A mirror sheet guide states flame polishing edges is not recommended, consistent with the risk of heat damage to coatings/backcoats and distortion.
About Cleaning
Q: How should I clean plastic mirror sheets without damaging them?
A: Recommends mild soap + soft cloth/microfiber with light pressure; avoid aggressive chemicals and do not use typical window sprays or scouring compounds on mirrorized sheets.
Q: What cleaning guidance exists specifically for PETG sheet products?
A: A PETG sheet datasheet recommends cleaning using warm soapy water (mild dish soap) and gentle wiping with a soft cloth; it also notes that a 50:50 IPA/water solution can work and warns against brushes/squeegees/sharp tools that scratch or damage UV coatings.
Q: What kind of solvent can remove grease from the surface of a mirror?
A: For certain deposits on the first (mirror) surface, one guide mentions hexane or kerosene; it also warns not to use chemicals on paint backcoats and to avoid general-purpose cleaners.
Q: Which chemicals are commonly listed as “attack” chemicals for acrylic/PC/PETG mirror sheets?
A: Examples include acetone, ammonia, benzene, MEK, methylene chloride, toluene, with polymer-specific differences and strong emphasis on compatibility testing.
Other
Q: What are the flammability/fire rating specifications for plastic sheets?
A: Most thermoplastic sheets are combustible and are characterized via standards like UL 94 and ASTM E84; many datasheets include these ratings (e.g., PETG HB or V-2 by thickness; acrylic sometimes includes E84 indices).
Q: Are plastic mirror sheets “hazardous materials” in normal handling?
A: SDS documents for mirror sheets commonly classify them as non-hazardous under OSHA in normal conditions, while still warning about fumes during burning/thermal decomposition and molten-material burns.
Q: What is “blushing” in a plastic mirror, and what causes it?
A: “Blushing” is described as a heat-related loss of reflective surface during bending; overheating the backcoat/reflective system can cause permanent visual defects.
Q: What documents should we request when selecting mirror-finished panels?
A: Best practice is to request a product datasheet (with test methods), fabrication/installation guide, and SDS, and to verify the mirror type (first-surface/second-surface/see-thru), thickness tolerances, masking type, and coating options.
Q: Does PETG’s UL 94 rating change with thickness?
A: One PETG datasheet states HB for PETG sheet thickness under 3 mm and V-2 for 3 mm or greater, highlighting why the exact thickness must be specified in compliance claims.
Q: What are common handling/storage issues that create defects in mirror sheets?
A: Common risks include abrasion from sliding sheets, masking removal damage, and warpage from storage conditions; guides recommend keeping masking on, storing flat/in controlled conditions, and minimizing humidity/temperature swings.
Q: Why do some plastic mirrors craze or crack after fabrication?
A: Environmental stress cracking can be driven by residual fabrication stress plus chemical exposure (solvents, cleaners, adhesive volatiles), and datasheets commonly recommend compatibility testing for any chemicals intended to contact the sheet.
Q: What are common “gotchas” when comparing mirror sheet quotes across suppliers?
A: Prices can shift due to substrate polymer, thickness, coating/hard-coat options, masking type, inspection grade (e.g., transportation/aircraft), size/tolerance requirements, and run-to-size services; ensure quotes match on these parameters.