Castaldo Rapido, Silicon Moulding Rubber, Very Fast, Super High Strength, 5lb Cut Strips, Marigold

Description

Creating a mould for your jewellery item is a time-saving solution, in a fast paced industry with demand for quick turn around.

Silicon moulding rubber is used to make vulcanised moulds, these moulds are heated and put under pressure (using a metal model) to create a mould that can be used repeatedly to produce further injection wax moulds for casting.

This Castaldo Rapido Silicon Moulding Rubber in marigold is a very fast version of the Castaldo silicon rubbers meaning it can speed up the moulding process for you as it can be produced in as little as 15 minutes.

This strong, tough putty like silicon rubber, has a shrinkage rate of 0.1% and vulcanises at a heat of 93°C / 200°F producing highly detailed wax injections with an extraordinarily shiny surface that requires less finishing.

Easy to work with this rubber allows waxes to self release without need for release spray or messy powder. Moulds are easy to pack and cut smoothly.

To use:

• Cut strips to a size that will fit your metal mould frame leaving the sticky backing cover on the bottom strip to protect it whilst packing
• Place 2 pieces (or aim for halfway up the mould) into the frame pressing it into the corners and paying attention not to trap air
• Add your sprue former and silver model, being careful to place it in the centre of the frame; If it is not halfway in depth you can push it into the rubber
• Add more pieces depending on the depth of your mould until rubber is level with the top of mould frame
• If it protrudes higher, use a wallpaper scraper or flat tool to scrape off so that the rubber is level
• Set your vulcaniser to the correct heat
• Use a marker to either name the design or draw a picture of what it is, the vulcaniser making it permanent
• We recommend cleaning the metal ends with washing up liquid on kitchen roll before putting the either side of your frame, this will help them not to stick (at this point remove your sticky backing paper)
• Place the mould into the pre heated vulcaniser and spin the handle until it stops a little and then turn it a tiny bit more; Unlike rubber mould you will not need to keep applying more pressure as silicon mould creates its own pressure when heated
• Set the timer and leave the vulcaniser to work
• When you take from the vulcaniser you may have flashing around the mould, you can trim this with scissors
• You are now ready to begin cutting your mould! Ensure that your mould is secured before cutting with a sharp scalpel blade (please seek advice before attempting this)

The amount of moulds that can be made per pack will depend on the depth of frame you use.