Making photopolymer stamps used to be a complicated and expensive process, not easily done at home. Ultra-violet light was used to cure, or vulcanise, the photopolymer resin (which had to be mixed just right) and the stamp design usually needed to be engraved professionally onto a metal plate. Also, the vulcanisation process involved heat and pressure, complicating the process and making moulds short-lived. Kits are now available that allow you to easily convert ready-made photopolymer resin sachets into stamps using just a computer and a lamp.
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Create the stamp design on your computer, using your preferred program. While you can print it out and then copy it in reverse onto transparent film or the lightweight paper provided with your kit, it will be easiest to print it straight onto your chosen format. To do this, first invert the colours on your design in the illustration or photo program you are using. All of them have an invert button to do this. Then put the film or paper into your printer and print the image negative in black and white.
Your kit will provide a special frame for you to put the image negative and one of the photopolymer resin sachets in. Make sure they are sandwiched tightly together in the frame. Using a lamp with a 60-watt bulb, expose the front and the back of the frame to the light for two minutes each side.
Wear the rubber gloves provided with your kit to cut the packaging away and peel the photopolymer pouch away from the new plate. Use the brush provided with the kit and some cool water to clean away any unexposed areas, which will still be in liquid form.
Put the photopolymer plate in a dish of water so it is fully covered and expose it to the 60-watt light bulb for a further 10 minutes. This will finish the curing process.
Dry your new stamp and stick it to an acrylic mount. It will now be ready for use.
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