Material Composition | Long-term preservation of high-value coins | - Industry Standard: HDPE (1.5g/cm³ density) - Our Base: PS (1.05g/cm³, ASTM D792) - Our Advanced: Acrylic (PMMA, 1.19g/cm³▲13% denser, ASTM D638) | Acrylic resists scratches and UV degradation (▲99% UV block vs Base’s 85%). | HDPE yellows over time; PS lacks acrylic’s durability. |
Thickness | Protecting coins from physical damage | - Industry Standard: 1.5mm (ISO 3801) - Our Base: 2mm (ISO 3801▲33% thicker) - Our Advanced: 3mm (ISO 3801▲50% thicker) | Enhanced structural integrity for heavy coins or institutional use. | Thicker slabs add weight/cost (e.g., Advanced is 20% heavier than Base). |
UV Protection | Preventing coin degradation from sunlight | - Industry Standard: 70% UV block (ISO 10977) - Our Base: 85%▲21% improvement - Our Advanced: 99%▲16% over Base | Advanced blocks 99% UV, ideal for museums or rare coins. | Standard’s 70% UV block may cause discoloration over decades. |
Clarity/Transparency | Easy visual inspection of coins | - Industry Standard: 80% light transmission (ASTM D1003) - Our Base: 88%▲10% clearer - Our Advanced: 92%▲4% over Base | Advanced’s 92% clarity reveals fine details (e.g., edge engravings). | Lower clarity in Standard may obscure subtle coin features. |
Weight/Portability | Transporting coins to shows or sales | - Industry Standard: 12g/slab (ISO 8301) - Our Base: 15g - Our Advanced: 18g▲20% heavier | Lighter Standard便于frequent travel. | Advanced’s added thickness makes bulk shipments costlier. |
Durability | Withstanding frequent handling | - Industry Standard: 500 flex cycles (ASTM D882) - Our Base: 800▲60% more durable - Our Advanced: 1200▲50% over Base | Advanced resists cracking after 1200+ uses (e.g., in high-traffic auctions). | Standard may crack under repeated bending or pressure. |