Ditto®, the world’s original room-temperature-vulcanizing (RTV) mold compound and one of the most trusted names in the jewelry industry, is the best-quality, best-performing, most advanced–formulation RTV material you can buy. Specially designed to mold heat-sensitive objects without the shrinkage that can distort designs, Ditto compounds are your most important step in achieving excellent results--every time! With Ditto, you can:
• Create master molds before investing carved-wax models.
• Reproduce fragile, organic or heirloom originals.
• Reproduce without expensive vulcanizing equipment.
• Customize, size and test wax design models before production.
Easy-to-use Ditto® Clear provides the highest degree of tear-resistance for pulling waxes with undercuts. Make easy-to-cut molds from original wax models; the model is visible inside the transparent mold for precise placement of a parting line when cutting mold. Use mold release with RTV frames. Parts A and B combine to produce 8.8 lbs. of compound. Use Teflon® mold release spray with Ditto products.
• Max. temperature: up to 400°F (204°C)
• Elongation: 350%
please note: • All varieties must be vacuumed to remove trapped air.
• When using glass or metal mold frames, the rubber may be cured with moderate heat (approximately 300° F) in 2 hours.
• Important! Do not heat-cure rubber in plastic mold frames.
This is a Rio Grande Exclusive.
How To Mix Ditto Mold Compound
To ensure reliably good results, know how to mix and prepare Ditto RTV mold compound. Measuring accurately, mixing thoroughly and vacuuming are each crucial steps in the process. With proper care, the shelf life of Ditto compounds is up to one year.
Using the Teflon® mold release, spray the mold frame, the plates, and your model so that the rubber will not stick to them during the molding process. Place the sprue on your model securely in the sprue former in the mold frame, then assemble the frame and place rubber bands around assembly making sure there are no gaps between the plates and the frame.
Stir the mold compound (part A) well and weigh out the desired amount, placing it in a clean mixing container.
Shake or stir the catalyst (part B) well, and add the recommended proportion (by weight) to the container. The container should not be filled more than 1/3 its height to allow sufficient room for expansion during evacuation.
Using a vacuum pump and bell jar, evacuate the trapped air from the mix (approximately 30 seconds). Break the vacuum for a split-second and then hold under vacuum until the mixture rises and falls. Hold for an additional minute after the rise and fall. This process should take approximately 5–6 minutes. If it takes longer, you may have a vacuum leak; check all connections or call Rio for more information.
Mix the mold compound and catalyst well, using a flat-ended metal spatula, until a uniform color is obtained. Scrape container sides and bottom several times during the process to ensure thorough mixing.
Release the vacuum, and pour the mixture into your prepared mold frame and vacuum again for approximately 4 minutes or until the mixture rises and falls again. Top off the mold frame to offset any loss of compound from this step of vacuuming. No additional vacuuming is needed after this.
Allow the rubber to cure for 16–24 hours before removing the mold from the frame. When using glass or metal mold frames, the rubber may be cured with moderate heat (approximately 300°F) in 2 hours. Important: Do not heat-cure rubber if you’re using plastic mold frames or if your model is heat sensitive.
After curing, cut the mold as you would any vulcanized mold.