Crystal Clear® 221

Crystal Clear® 221

Crystal Clear® 221为无色透明产品,专为需要清晰度的应用而设计。树脂为“热固化”系统,是流行的Crystal Clear®系列树脂较硬版本(邵氏硬度85D)。不同型号树脂仅在操作和脱模时间上有所不同。低粘度确保易于混合和浇注。Crystal Clear®树脂可在室温下固化,收缩率可忽略不计。
 
小心:不适用于家庭使用。此产品仅供工业使用。适当的通风,佩戴需要NIOSH认可的呼吸器和防护服(手套和长袖),将吸入和皮肤过敏的风险降至最低。如果呼吸受到影响或出现皮疹,请立即停止使用本产品并寻求医疗救助。使用前请阅读SDS。

特征

固化的浇注件:

通过添加颜料可实现鲜艳的色彩和色彩效果。
应用包括:封装、制作原型、模型、镜头、雕塑复制品、装饰浇注件、首饰、原型模型、特殊效果、道具


说明

Safety - Store and use at room temperature (73°F/23°C). These products have a limited shelf life and should be used as soon as possible. Environmental humidity should be as low as possible. Good room size ventilation is essential. Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk. Wearing a NIOSH approved respirator will minimize inhalation of residual fumes.
 

Selecting A Mold Rubber - Pour into a urethane rubber mold (Vytaflex urethane – release agent required), tin cured silicone mold (Mold Max® silicone) or Mold Star® 15, 16 or 30 (not Mold Star® 20T) platinum cured silicone. Do not use other rubber mold products. If you are unsure about surface compatibility, a trial casting should be made. To prevent cure inhibition, post-cure newly made Mold Max® silicones for 8 hours at 150°F / 60°C and let cool prior to casting resin.

For Best Results: Pre-heat the rubber mold at 212°F / 100°C for 4 hours before mixing & pouring Crystal Clear®. This will minimize the chances that cured castings will exhibit casting phenomenon such as fish-eyeing, suck back, corner rounding, large bubbles, etc.


Liquid urethanes are moisture sensitive and will absorb atmospheric moisture. Mixing tools and containers should be clean and made of metal or plastic. Materials should be stored and used in a warm environment (73°F / 23°C).

Measuring - Materials should be stored and used at room temperature (73°F / 23°C). The proper mixing ratio is 100A:75B by weight. You must use an accurate scale (gram scale or triple beam balance scale) to weigh these components properly Dispense the required amount of Part A into a mixing container. Weigh out the appropriate amount of Part B and combine with Part A.

Mixing - Mix SLOWLY, but thoroughly, for at least 90 seconds making sure that you scrape the sides and bottom of your container several times. If coloring or filling Crystal Clear® product, add filler or pigment dispersion to Part B and mix thoroughly before adding Part A.

Bubbles in the finished casting will be greatly reduced by vacuum degassing prior to pouring. Subject mixture to 29 h.i.g. mercury in a suitable vacuum chamber for until mixture rises, breaks and falls. Allow for 3 to 4 times volume expansion in mixing container.


IMPORTANT: Shelf life of product is reduced after opening. Remaining product should be used as soon as possible. Immediately replacing the lids on both containers after dispensing product will help prolong the shelf life of the unused product. XTEND-IT® Dry Gas Blanket (available from Smooth-On) will significantly prolong the shelf life of unused liquid urethane products.


Pouring - If casting Crystal Clear® into a rubber mold, pour mixture in a single spot at the lowest point of the mold. If encapsulating an object, do not pour the mixture directly over the object. Let the mixture seek its level. A uniform flow will help minimize entrapped air.

For Best Results: Bubble elimination is best achieved by pressure casting. After pouring the mixed compound, the entire casting assembly (mold, dam structure, etc.) is placed in a pressure chamber and subjected to 60 PSI (4.2 kg/cm2) air pressure for at two hours prior to heat curing.


Room Temperature Cure - Followed By Post Cure - Allow material to cure overnight at room temperature (73°F / 23° C). Place entire mold structure in an oven and cure at 150°F / 60°C for 4 hours, followed by 4 hours at 212°F / 100°C. Allow casting or part to cool to room temperature before demolding.

Heat Curing - After pouring material into pre-heated mold, heat cure for four hours at 212°F / 100°C. Allow casting or part to cool to room temperature before demolding.

Because no two applications are quite the same, a small test application to determine suitability for your project is recommended if performance of this material is in question.

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