
1 - The original is a carved wood model. In most cases when reproducing a wooden original, it is important to also reproduce the woodgrain.
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2 - Gather all materials, including accessories, prior to beginning the mold making process.
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3 - Begin by securing the original model to a melamine board using hot melt glue.
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4 - Next, spray the original model with Ease Release® 200 release agent. This will aid in removing the cured silicone mold from the original.
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5 - Measure out Part A of Dragon Skin® Q silicone rubber. It is important to use the fast set version (''Q'') when making a brush on mold. This will drastically speed up the mold making process.
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6 - Measure out and equal volume of Part B.
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7 - Dragon Skin® is translucent in its natural state. This can sometimes make it difficult to ensure thorough coverage over an original model. Adding a small amount of Silc-Pig® silicone pigment will eliminate this problem.
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8 - A small amount of THI-VEX® II silicone thickening agent is added to the mixture. This will help the silicone stay on vertical surfaces.
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9 - Combine all components and mix thoroughly. Continue mixing until there are no color striations present.
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10 - Apply Dragon Skin® Q to the original model.
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11 - The first layer of a brush-on mold should be thin. This will help eliminate any chance of bubble entrapment.
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12 - Apply Dragon Skin® Q over the entire model and begin building a flange 3'' (8 cm) around the base of the model. Allow rubber to cure until tacky (approximately 45 minutes).
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13 - Mix a second thickened batch of Dragon Skin® Q. Adding a different Silc-Pig® pigment to alternate layers will help ensure thorough coverage over the entire model.
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14 - Apply a second coat of Dragon Skin® Q. The yellow Silc-Pig® contrasts well with the previous layer.
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15 - Second layer can go on thicker than the first.
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16 - Completely cover the model and continue building flange. Allow rubber to cure until tacky (approximately 45 minutes).
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17 - Mix a third batch of Dragon Skin® Q silicone.
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18 - Add additional THI-VEX® II thickening agent to this layer.
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19 - Using much thicker material means the mold can be built up faster. Use a stick to trowel the thickened rubber over the previous layer.
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20 - Cover entire model and continue building flange. Allow rubber to cure until tacky (approximately 45 minutes).
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21 - Mix a final batch of Dragon Skin® Q with some THI-VEX® II added.
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22 - Brush this batch over all other layers. This layer will further build thickness, but will also smooth out the surface of the mold, making application of a support shell easier.
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23 - Completed Dragon Skin® Q brush-on mold. Ultimate mold thickness should be approximately 3/8'' (1 cm). Allow rubber mold to completely cure (approximately 75 minutes).
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24 - Prepare the mold for application of the support shell by trimming back the flange to a straight edge around the entire mold.
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25 - Gather materials used to create the support shell.
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26 - This mold requires a two-piece support shell. Begin by planning out where the support shell will split to prevent mechanical lock. Draw a line over the high points of the model.
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27 - Using water clay, create a shim along the line drawn in the previous step. This shim will act as a separation line between the two halves of the shell. Brush Smooth-On's Sonite® Wax over all surfaces Plasti-Paste® will come in contact with, including the base board.
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28 - Smooth-On's Plasti-Paste® filled urethane plastic is designed for use as a support shell. It is mixed in a ratio of 1 Part A to 3 Parts B by volume.
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29 - Mix and apply Plasti-Paste® over the rubber mold.
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30 - Build Plasti-Paste® support shell to an ultimate thickness of 3/8'' (1 cm).
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31 - After first half of Plasti-Paste® shell has fully cured (about 90 minutes), removed clay in preparation for application of second half.
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32 - Plasti-Paste® will stick to itself and other surfaces vigorously. It is important to use a release agent to separate the two halves of the shell. Begin by applying Smooth-On's Sonite® Wax to any surface the fresh Plasti-Paste® will come in contact with.
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33 - Follow the application of Sonite® Wax with a spray coat of Universal Mold Release®.
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34 - Mix and apply a second batch of Plasti-Paste®.
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35 - Build Plasti-Paste® support shell to an ultimate thickness of 3/8'' (1 cm).
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36 - Allow Plasti-Paste® shell to full cure (approximately 90 minutes).
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37 - Once the Plasti-Paste® has cured, the support shell can be removed.
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38 - Before peeling back the rubber mold, apply some talc powder to the outside surface of the mold.
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39 - The talc powder will make removing the Dragon Skin® mold easier by reducing friction on the surface of the rubber.
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40 - Begin removing the Dragon Skin® by peeling it back from the base.
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41 - Continue rolling the rubber mold over on itself. Dragon Skin® is soft and stretchy enough to be completely inverted, like a glove.
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42 - The Dragon Skin® rubber will reflect perfect detail captured from the original piece. Because the silicone is so stretchy, there is no need to cut the mold in order to remove the original.
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43 - Re-seat the Dragon Skin® mold into the Plasti-Paste® support shell. Rubber bands are used to bind the two halves of the shell together.
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44 - Invert the mold and place it into a bucket. Once the mold is level, the casting process can begin.
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45 - When reproducing woodgrain, it is important to use the appropriate combination of resin and filler. Smooth-On's Ure-fil® 5 is combined with Smooth-Cast® 300 to create a woodgrain finish. The proper mix ratio is 1 Part A to 1 Part B to 1 Part filler by volume.
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46 - Combine all elements. Adding SO-Strong® Brown pigment will result in a casting closer in color to the original. Mix all elements thoroughly until no color striations are present.
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47 - Once thoroughly mixed, pour the resin/filler mixture slowly into the mold.
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48 - Once the Smooth-Cast® resin has cured (about 10 minutes) the Dragon Skin® silicone mold can be removed from the casting.
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49 - Cured casting is a dull tan color, but the woodgrain is still present in the piece. It simply needs to be highlighted.
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50 - In this case, black shoe polished is brushed into the surface of the piece.
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51 - Allow the shoe polish to sit for a short period, then use a paper towel to wipe off excess. Shoe polish will remain in details and deeper areas of the casting.
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52 - Following a spray with clear acrylic lacquer, the finished pieced is displayed alongside the original. The woodgrain has been reproduced to perfection and casting looks just like real wood!
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