In wide-spectrum mold making scenarios such as chocolate molds, candy molds, sugar flipping, DIY molds, epoxy resin, cement components, cultured stone, jewelry diamonds, and zinc alloy crafts, the four-dimensional indicators of "food-grade safety — low-viscosity flowability — high tear durability — wide hardness adaptability" of mold materials have always been the core contradiction in measuring mold replication precision and service life. Traditional condensation-cure silicones, while low-cost, release alcohol/acid by-products during curing, have odors, and suffer vulcanization poisoning from sulfur/phosphorus/nitrogen, causing sticky uncured surfaces. PU resin, while hardness-adjustable, lacks elasticity, causes demolding damage, and is non-food-grade. Gypsum molds have poor precision, are fragile, and cannot be reused. With the continuous upgrading of food-grade baking mold and precision casting demands, sourcing a liquid silicone with "low viscosity for easy defoaming, high tear strength, food-grade platinum catalysis, and full coverage from ultra-soft to semi-hard hardness" has become the core proposition for domestic mold material autonomy. Addressing this, Anhui IOTA Silicone Oil Co., Ltd. officially launches IOTA LSR 3500L Series Low Viscosity Food Grade Mold Liquid Silicone Rubber. Characterized by "two-component addition-cure platinum-catalyzed silicone elastomer; hardness range Shore 0A to 40A (3500L: Shore 0A/10C, 3505L: 5A, 3510L: 10A, 3515L: 15A, 3520L: 20A, 3530L: 30A, 3540L: 40A); tear strength >10-20 N/mm; viscosity <2000-4000 CPS; ratio AB=1:1 (customizable); color: colorless translucent or custom; non-dangerous goods, sealed cool storage 1 year; long-term use at -65°C to 200°C maintaining soft elasticity; water/ozone/weather resistant; physiologically inert; low linear shrinkage", backed by "low viscosity high tear + food-grade safety + wide hardness spectrum", it serves as the "precision casting choice" for mold making, achieving the leap from "condensation-cure odor and poisoning risk" to "platinum low-viscosity high-tear food-grade precision casting". System Positioning: Addition-Cure Platinum Mold Silicone vs. Condensation Silicone / PU / Gypsum IOTA LSR 3500L Series belongs to the addition-cure platinum-catalyzed liquid silicone system, distinct from condensation-cure silicone, PU resin, and gypsum. Condensation-cure silicone releases by-products, has odors, and suffers poisoning from sulfur/phosphorus/nitrogen. PU resin lacks elasticity, causes demolding damage, and is non-food-grade. Gypsum molds have low precision and are fragile. Platinum curing achieves by-product-free crosslinking through hydrosilylation, food-grade and odorless, while low viscosity grants excellent flowability and detail replication, thoroughly avoiding the shortcomings of traditional mold materials. Molecular Architecture: Platinum Addition Network + Low-Viscosity High-Flow Fluid + Wide Hardness Gradient Spectrum The core competitiveness of IOTA LSR 3500L Series stems from the precision molecular design of its addition-cure mold silicone:

• Platinum Addition Network: After mixing AB 1:1, platinum catalyst initiates hydrosilylation between vinyl and Si-H bonds, forming a by-product-free, odorless high-purity crosslinked network. Food-grade safe, meeting direct food contact requirements for chocolate/candy molds.
• Low-Viscosity High-Flow Fluid: Full series viscosity controlled below 4000 CPS (soft grades <2000 CPS). Excellent flowability after mixing penetrates micro-textures, perfectly replicating every detail of complex surfaces like jewelry and cultured stone. Strong self-defoaming reduces vacuum equipment dependency.
• Wide Hardness Gradient Spectrum: From ultra-soft Shore 0A (for fondant, chocolate demolding) to semi-hard Shore 40A (for epoxy, cement, zinc alloy), seven hardness grades cover the full spectrum from food molds to industrial precision casting. Tear strength同步 rises to >20 N/mm, greatly extending mold life.

Performance Leap: From "Odorous Poisoning Poor Precision" to "Platinum Low-Viscosity High-Tear Precision Casting" Introducing IOTA LSR 3500L Series brings a qualitative leap to mold manufacturing:

• Food-Grade Safe and Eco-Friendly: Platinum curing produces no by-products, non-toxic and odorless. Low-hardness grades dedicated to chocolate, candy, fondant and other food-grade molds, meeting food contact requirements.
• Low Viscosity, High Tear: Industry-leading combination of low viscosity and high tear strength (>10-20 N/mm). Molds are delicate yet tough, resisting tearing during repeated demolding, with long service life.
• Wide Temperature Stability: Long-term use at -65°C to 200°C maintaining soft elasticity; remains elastic even at -120°C. Water, ozone, and weather resistant, adapting to frozen dessert demolding and high-temperature resin casting.
• Low Shrinkage, Easy Operation: Low linear shrinkage, excellent dimensional stability. AB=1:1 mixing, general operation, room temperature or heat curing.
• Chemical Inertness, Non-Corrosive: Non-corrosive to mold substrates, suitable for epoxy, polyester, paraffin, concrete, metal and other casting materials.
• Flexible Formulation: Curing speed, hardness, and strength adjustable according to product structure, mold structure, and production process to meet mass production needs.

Application Penetration: From Food Molds to Industrial Precision Casting The application boundary covers all mold scenarios requiring "food-grade safety + low viscosity high tear + precision replication":

• Food-Grade Molds (Low Hardness Main Force): Chocolate molds, candy molds, sugar flipping, DIY baking molds, providing a non-toxic, easy-demolding, high-precision ideal carrier.
• Industrial Precision Casting (Medium-High Hardness): Epoxy resin, polyester resin, paraffin molds; large cement components, cultured stone, concrete decorative parts; jewelry diamonds, crafts, zinc alloy precision molds, balancing flexible demolding and dimensional accuracy.

IOTA Technical Guide: Clean Mix, Vacuum Defoam

• Application: Clean new mold surface with white oil or detergent water, air dry; mix AB 1:1 by weight; natural defoaming or vacuum 10-30 min; pour and cure at room temperature (operation time ~1 hour, fully cured in 3x operation time), or heat to accelerate.
• ⚠️ Taboo: Strictly prohibit contact with condensation-cure silicone, sulfur, phosphorus, nitrogen compounds, otherwise vulcanization poisoning causes surface uncured; if condensation molds were used, thoroughly clean with white oil or solvents; avoid high temperature and direct sunlight.
• Storage: Non-dangerous goods, sealed cool storage, protect from rain and sunlight; shelf life 1 year.
• Handling: Color can be customized; heat-resistant additives can extend to fire-resistant putty, coatings, encapsulation; demold with 3%-5% detergent water.

Industry Insight: In high-end mold silicones, the molecular design of addition-cure liquid silicone — "platinum-catalyzed by-product-free + low-viscosity high-flow + wide-hardness high-tear spectrum" — is the key path to achieving the trinity of "food-grade safety + precision replication + long life" — the introduction of platinum catalyst solves the industry pain point of condensation silicone: "odorous, poisoning risk", while the combination of <2000 CPS ultra-low viscosity and >20 N/mm high tear strength ends the application shortcoming of traditional mold materials: "low viscosity means low strength". IOTA LSR 3500L Series, with "food-grade + Shore 0A-40A seven grades + tear strength >20 N/mm + viscosity <4000 CPS + non-dangerous goods" hard metrics, fills the key supply chain link for domestic mold liquid silicone in food contact, precision casting, and industrial components, providing a mass-producible high-performance mold material for downstream baking, handicraft, building material, and jewelry enterprises. This confirms that domestic liquid silicone is leaping toward "condensation-cure → ordinary addition-cure → platinum low-viscosity high-tear wide-spectrum precision casting", with growing technical say in the mold making field.